1991 Mercury Cougar Engine Parts

Essential 1991 Mercury Cougar Engine Parts

Premium Drive Train – Engine Assembly (Part No.L4694R2T)

Engine Assembly

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$2752.99
(PDT) Premium Drivetrain Engines are remanufactured to original equipment (OEM) demanding specifications by an OEM builder. Each engine assembly is manufactured with the highest technology equipment, the most intelligent engineering support, and the best practices available in remanufacturing today.

Product Features:
  • REMANUFACTURING and QUALITY CHECKS – ENGINE BLOCKS: Each block is magnafluxed for cracks and checked for any visible damage to the block or threaded holes before being repainted to the original color. Five CNC machining centers are programmed to precise specifications that meet or exceed those established by the OEM for each engine block. After the engine block is bored, decked, and chamfered, each cylinder is honed with the specified OEM cross-hatch pattern. 100% gauging of all cylinder bores for diameter and roundness after final honing operation. 100% new pistons, rings and bearings are installed in every engine.
  • CYLINDER HEADS: Every head is resurfaced and completely inspected for any visible damage or cracks to the casting or threaded holes. Any heads that have cracks in the combustion chamber are immediately scrapped, no weld repairs. Valve seats are machined, inspected and replaced if necessary. Valve guides are inspected with an air gauge and replaced if necessary. The cam bore is air gauge checked on overhead cam engines and machined if required. 100% new valves, seals and lifters are used in every head. All head and valve assemblies are quantified for leakage using a vacuum decay process.
  • CONNECTING RODS: Each connecting rod is measured against OEM specifications for bend, twist, and center-to-center length before use. The piston pin bore and bearing bore are measured with air gauges for proper dimensions. New torque to yield rod bolts and nuts are installed.
  • CRANKSHAFTS: Crankshafts are machined on a fully automated CNC crank grinder. This enables consistency and critical tolerances for each journal. All oil galley holes are chamfered and brushed after machining and the crankshaft is given a final wash to ensure cleanliness. Each crank is inspected for cracks, bow and all applicable run-out specs for rod and main journals.
  • DYNAMIC ENGINE TESTING: Sims Testing – All engines are cold motored and checked and measured for proper torque to turn, cylinder compression, oil flow, oil pressure as well as monitored for any unusual noises inside the assembly. All engine assemblies quantified for oil gallery, gasket, and casting leakage in the oil passageways.
  • Product might not be available in all states due to local laws.
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Felpro – Oil Pan Gasket Set: High-Temperature Rubber-Coated Fiber, 3 Piece Set (Part No.OS 11701 D)

Oil Pan Gasket Set: High-Temperature Rubber-Coated Fiber, 3 Piece Set

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$22.49
Fel-Pro gaskets offer 100% vehicle sealing with application-specific materials to give you sealing solutions with the performance and durability professionals trust

Product Features:
  • DESIGNED FOR IMPERFECT SEALING SURFACES — Engineered and manufactured specifically for the repair environment to help seal imperfect sealing surfaces
  • ENGINEERED TO PERFORM — Proprietary cork-rubber formulation
  • SUPERIOR SEAL — Highly conformable to accommodate for the imperfect sealing surfaces
  • EVERY PART FOR THE REPAIR — Fel-Pro gasket sets include every part needed for the repair unless otherwise noted
  • REAL-WORLD TESTED — Parts are tested on-vehicle and validated to ensure optimal performance on the road
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Competition Cams – SUPER VALVE LOCKS, 3/8" 1 ST (Part No.612-16)

SUPER VALVE LOCKS, 3/8" 1 ST

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$553.99
Inside tang-to-taper relationship held tightly for repeatable valve spring installed heights

Product Features:
  • For simplicity, any Super Lock fits any COMP Cams 10° retainer – just choose the correct lock for you valve size and application
  • Super Locks are recommended in all race applications
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Cloyes Gear – Engine Timing Camshaft Sprocket (Part No.S764T)

Engine Timing Camshaft Sprocket

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$33.99
Along with the timing chain, tensioners, and guides, sprockets are an integral component within the timing system. Timing gears and sprockets are available as part of complete timing kits as well as for individual purchase and installation

Product Features:
  • Featuring precision-tooled or machined tooth form and precision-machined bore for true fit, timing chain sprockets offer reliability and dependability for engine rebuilds and typical replacement jobs
  • Recommended that the chain tensioner(s), sprocket(s), and guide(s) also be replaced when the chain is replaced, as these components play a vital role in system stability and accurate timing
  • CAD designed and manufactured using premium materials
  • Each part is extensively tested and measured for function, fitment, and durability to ensure optimal performance
  • Refer to our online catalog for detailed application-specific information
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Felpro – Fuel Injection Plenum Gasket Set (Part No.MS 95727)

Fuel Injection Plenum Gasket Set

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$32.99
Fel-Pro gaskets offer 100% vehicle sealing with application-specific materials to give you sealing solutions with the performance and durability professionals trust

Product Features:
  • DESIGNED FOR IMPERFECT SEALING SURFACES — Engineered and manufactured specifically for the repair environment to help seal imperfect sealing surfaces
  • SEALING TECHNOLOGIES — Exclusive sealing innovations and technologies with proprietary materials and unique design features to ensure a superior seal for your repair
  • ENGINEERING EXPERTISE — Parts are designed, reviewed, validated and approved by Fel-Pro engineers through rigorous research and development
  • REAL-WORLD TESTED — Parts are tested on-vehicle and validated to ensure optimal performance on the road
  • EVERY PART FOR THE REPAIR — Fel-Pro gasket sets include every part needed for the repair unless otherwise noted
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Felpro – Engine Timing Cover Gasket Set (Part No.TCS 45167)

Engine Timing Cover Gasket Set

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$26.49
Fel-Pro gaskets offer 100% vehicle sealing with application-specific materials to give you sealing solutions with the performance and durability professionals trust

Product Features:
  • Meets or exceeds all original equipment specifications
  • Application specific design to ensure a perfect fit
  • Engineered and manufactured specifically for the repair environment
  • Unsurpassed quality you can trust
  • Validated for fit, form, and function
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Imperial – Ultra-Cool Engine Oil Cooler Kit (Part No.240457)

Ultra-Cool Engine Oil Cooler Kit

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$167.99
Product Features:
  • Size: 3/4 in. x 10 in. x 12-1/4 in.
  • Medium duty applications
  • All except Chevrolet V8 applications
  • Two-pass design for increased cooling
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Motorcraft – Engine Oil Filler Cap (Part No.A6140422899MTR)

Engine Oil Filler Cap

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$9.52
Motorcraft® offers a wide variety of caps to support the ongoing maintenance needs of Ford and Lincoln vehicles. Plus, all are recommended by Ford Motor Company.

Product Features:
  • Engineered to conform to strict emission control standards
  • Both twist-lock and push-on types are available
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Anchor – Engine Mount: Front Left, 1 Piece (Part No.2682)

Engine Mount: Front Left, 1 Piece

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$20.99
The purpose of the mount is to support the engine and transmission on the chassis and dampen vibration and noise from reverberating to the rest of the vehicle. Engine and Transmission Mounts are engineered and manufactured to meet or exceed OEM specifications using the latest CAD/CAM engineering process to ensure superior quality, form, fit and function. Only premium quality materials are used in the manufacturing process to guarantee precise performance and maximum durability. Applicable to Applicable to FORD 83-92; MERCURY 79-86;. Please verify your application.

Product Features:
  • MAXIMUM LIFE & PERFORMANCE: Both natural and SBR (Styrene Butadiene) rubber provide good abrasion resistance and aging stability to ensure maximum life and performance.
  • MEETS OR EXCEEDS DUROMETER MEASUREMENTS: All rubber material is manufactured to specific Durometer (hardness) measurements based on the vehicle’s application requirements.
  • HARDENED STEEL FASTENERS: All fasteners are made of hardened steel with heat treated Grade #5 bolts.
  • SUPERIOR BOND: A special Chemlock® bonding agent is used to ensure a superior rubber-to-metal bond.
  • HYDRAULIC MOUNT DESIGN: Hydraulic Mounts (applicable where OE) are designed for most front wheel drive vehicles because transverse drive train mounting.
  • For Years: 1979-1992
  • Weight approx: 4 Lbs
  • PART GROUP: 2682, 2683
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NTK – Camshaft Position Sensor (Part No.EC0119)

Camshaft Position Sensor

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$88.99
The Camshaft Position Sensor plays a vital role in your engine’s operation; to determine the exact position and speed of the camshaft(s) to the ECM. The ECM uses this information to determine fuel and spark timing as well as VVT operation. A failed sensor can result in a check engine light, hard starting or failure to start, increased vehicle emissions and engine misfire. NTK Camshaft Position Sensors are a premium quality product with outstanding support and leading innovation bred from our OE heritage.

Product Features:
  • THE NTK DIFFERENCE: Enhanced, robust circuit board traces and precision-wound coated-copper windings increase durability, longevity and performance
  • OE QUALITY: Designed to meet or exceed OE specifications, fit, form and function to ensure proper position and/or rotating speed of the camshaft
  • EXTENSIVE TESTING: 100 percent thermal shock and vibration tested for best in class performance and reliability in the most extreme conditions
  • PRODUCT ENGINEERING: Premium seals prevent leaks or corrosion, while optimized magnet size and strength ensures precise, consistent signal output
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Cloyes Gear – Primary Timing Chain Kit: Exact Fit, 116 Links, Timing Components, Without Sprockets (Part No.9-0387SAX)

Primary Timing Chain Kit: Exact Fit, 116 Links, Timing Components, Without Sprockets

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$244.99
Designed for the replacement of worn or damaged timing chains, tensioners, and guides, Timing Chain Kits includes all components for a quick and efficient replacement. Each part is CAD designed and manufactured using premium materials. Recommended that the chain tensioner(s), sprocket(s), and guide(s) also be replaced when the chain is replaced, as these components play a vital role in system stability and accurate timing.

Product Features:
  • Meet or exceed OEM performance requirements, ensuring a quiet and maintenance free experience
  • Utilizes the latest in design and technology to offer a complete chain kit solution
  • Each part is extensively tested and measured for function, fitment, and durability to ensure optimal performance
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Sealed Power – Engine Piston Set (Part No.8KH273CP 30)

Engine Piston Set

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$272.99
Sealed Power® parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.

Product Features:
  • Helps improve cylinder sealing for less blow-by
  • Retains standard ring gaps in top groove
  • DUROSHIELD« skirt-coated piston
  • Moly-graphite coating extends engine life
  • Reduces friction for higher fuel economy
  • Prevents damage from inadequate lubrication on start-up
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Carquest Premium – Chain Arm – Left (Part No.9341)

Chain Arm - Left

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$24.99
Advance Auto Parts is proud to carry this part with the best fitment and performance requirements for this application, from the highest quality timing component vendor.

Product Features:
  • The part is precision machined with high grade material for greater durability
  • Maintains excellent chain or belt tension
  • Meets or exceeds O.E.M. performance
  • Part is quality inspected and tested
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Dorman – Timing Cover With Gasket And Seal (Part No.635-107)

Timing Cover With Gasket And Seal

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$113.99
This direct replacement timing cover matches the fit and function of the original equipment cover for a reliable repair. This part has undergone extensive testing to ensure adherence to precise design standards.

Product Features:
  • Direct replacement – this engine timing cover matches the fit and function of the original equipment cover
  • Durable construction – this part is specifically designed to withstand extreme underhood temperatures for a long service life
  • Cost-effective solution – offers original equipment quality at a competitive price
  • Quality tested – this part has undergone extensive testing to ensure a quality fit and long service life
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Felpro – Engine Conversion Gasket Set (Part No.CS 8548-9)

Engine Conversion Gasket Set

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$57.99
Fel-Pro gaskets offer 100% vehicle sealing with application-specific materials to give you sealing solutions with the performance and durability professionals trust

Product Features:
  • Conversion Sets (CS) provide every gasket for lower engine work – add a Head Set (HS) for complete engine overhaul work
  • Application specific design to ensure a perfect fit
  • Meets or exceeds all original equipment specifications
  • Validated for fit, form and function
  • Unsurpassed quality you can trust
  • Includes all the parts necessary to complete the repair unless otherwise noted
  • Includes all the parts necessary to complete the repair unless otherwise noted
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Felpro – Engine Valve Cover Gasket Set (Part No.VS 50068 C)

Engine Valve Cover Gasket Set

from

$22.99
Fel-Pro gaskets offer 100% vehicle sealing with application-specific materials to give you sealing solutions with the performance and durability professionals trust

Product Features:
  • DESIGNED FOR IMPERFECT SEALING SURFACES — Engineered and manufactured specifically for the repair environment to help seal imperfect sealing surfaces
  • ENGINEERED TO PERFORM — Proprietary cork-rubber formulation
  • SUPERIOR SEAL — Highly conformable to accommodate for the imperfect sealing surfaces
  • EVERY PART FOR THE REPAIR — Fel-Pro gasket sets include every part needed for the repair unless otherwise noted
  • REAL-WORLD TESTED — Parts are tested on-vehicle and validated to ensure optimal performance on the road
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Felpro – CYLINDER HEAD BOLT SET (Part No.ES 72159)

CYLINDER HEAD BOLT SET

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$33.49
Fel-Pro gaskets offer 100% vehicle sealing with application-specific materials to give you sealing solutions with the performance and durability professionals trust

Product Features:
  • Meets or exceeds all original equipment specifications
  • Application specific design to ensure a perfect fit
  • Avoid risk associated with re-use of T-T-Y (torque to yield) head bolts
  • Validated for fit, form and function
  • Unsurpassed quality you can trust
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Melling – Stock Replacement Type Oil Pump Intermediate Shaft (Part No.IS-65B)

Stock Replacement Type Oil Pump Intermediate Shaft

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$14.29
A new Melling oil pump shaft is recommended to complete every new oil pump install. Melling offers a complete line of high quality shafts for domestic and import pump applications. A new oil pump shaft is necessary due to possible metal fatigue, cracking

Product Features:
  • Manufactured from high quality materials for consistent durable wear
  • Precision engineered for optimum fit and function
  • Designed for long-life and worry-free performance
  • Meets or exceeds original equipment specifications
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Dorman – Help – Rubber Expansion Plug 1-5/8 In. – Size Range 1-5/8 In. – 1-3/4 In. (Part No.10232)

Rubber Expansion Plug 1-5/8 In. - Size Range 1-5/8 In. - 1-3/4 In.

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$4.29
Our Engine Intake Manifold Expansion Plug is conveniently designed as a direct replacement for stripped plugs. A proper fit is ensured, every time.

Product Features:
  • Manufactured from high quality materials for a long service life
  • Torque values listed on parts (where applicable)
  • Easy to install
  • Constructed to strict engineering quality standards
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ARP Auto Racing – For Use With Ford 289/ 302 With Aluminum Timing Cover And Water Pump, Hex Head (Part No.154-1504)

For Use With Ford 289/ 302 With Aluminum Timing Cover And Water Pump, Hex Head

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$36.49
ARP timing cover bolts are available in both polished stainless steel or black oxide finish chrome moly. You also can choose between standard hex head bolts or compact 12 point fasteners. Also available as part of ARP complete engine and accessory kits. Studs are preferred by many pro engine builders because they eliminate the chance of pinching gaskets and contribute to easier engine assembly. You will note that ARP studs feature a special bullet nose to guide the nut accurately into place. Available in black oxide finish 8740 chrome moly or polished stainless steel with hex or 12 point nuts. Alternators that come loose are a pain, so That is why ARP came up with these super tough bolts (your choice of chrome moly steel or polished stainless (ARP 300) both rated 170,000 PSI). The stainless has the added advantage of being rust and corrosion resistant. It is the fastener of choice.

Product Features:
  • Made From Black Oxide Finished 8740 Chrome Moly Or Corrosion Resistant Stainless Steel
  • Nominally Rated At 180,000 Pounds Per Square Inch Tensile Strength To Provide You With Plenty Of Clamping Force
  • Made In USA
  • Will Not Fit 5.0L Roller Cam Applications
  • Sold As A Kit
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Factory Air – O-Ring & Gasket A/C System Seal Kit (Part No.26717)

O-Ring & Gasket A/C System Seal Kit

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$15.99
High quality OE replacement part with all components needed to complete the job

Product Features:
  • All the seals needed to complete the job
  • Compatible with both R12 and R134a refrigerants
  • Application specific
  • SUV & rear air applications
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Sealed Power – Engine Push Rod (Part No.RP-3284)

Engine Push Rod

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$2.99
Sealed Power« parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
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Flex A Lite – Oil Cooler Sandwich Adapter Kit (Part No.3961)

Oil Cooler Sandwich Adapter Kit

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$42.99
Oil Cooler Sandwich Adapter Kit

PowerBond – Harmonic Balancer (Part No.PB1478N)

Harmonic Balancer

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$59.99
Powerbond Premium OEM Replacement Balancers are manufactured using premium ductile iron castings and injection bonded dampening rubber. Unlike typical original equipment balancers that are made with press inserted dampening rubber, the bonded dampening rubber in the Powerbond Premium OEM Replacement Balancer provides superior bonding strength between the inner and outer balancer rings that minimizes spinning and dislocation in high torque and serpentine belt appplications. With a unique combination of high strength castings, bonded dampening rubber, and dynamic balance, the Powerbond Premium OEM Replacement Balancer is the ultimate standard replacement balancer.

Product Features:
  • Designed as a premium OE replacement
  • Dynamically balanced for smooth operation
  • Strong Iron casting for maximum strength
  • OEM equivalent bonded rubber
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Dorman – Pipe Plug-Square Head-1/4 In. MNPT (Part No.490-071.1)

Pipe Plug-Square Head-1/4 In. MNPT

from

$3.99
This pipe plug matches the original equipment plug for diameter, thread pitch and head type to ensure a reliable repair. Made of corrosion-resistant material, it has been engineered for leak-free performance and a long service life.

Product Features:
  • Ideal replacement – this pipe plug matches the diameter, thread pitch and head type of the original equipment part
  • Durable construction – this plug is made of quality materials for dependable service
  • Leak-free performance – quality manufacturing process ensures a tight for reliable sealing
  • Quality tested – this plug has undergone validation testing to ensure proper fit and function for this vehicle’s application
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Cardone – Engine Control Module (Part No.78-5196)

Engine Control Module

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$238.99
CARDONE Remanufactured Electronic and Powertrain Control Modules are designed to meet or exceed O.E. performance. Reverse engineering provides insight into how and why the unit originally failed, allowing our engineers to identify and correct original design weaknesses. All critical components are re-soldered or replaced at our Philadelphia manufacturing plant, and each unit is 100% computer tested to ensure reliability. CARDONE is committed to getting your vehicle back to peak performance.

Product Features:
  • Tested with automated computer equipment or bench-tested, depending on application, to ensure functionality.
  • Re-soldering of critical components ensures superior electrical connections. This prevents intermittent failures and leads to longer product life.
  • On-car vehicle validation is done to test durability and performance.
  • As a remanufactured Original Equipment part, this unit guarantees a perfect vehicle fit.
  • Our remanufacturing process is earth-friendly, as it reduces the energy and raw material needed to make a new part by 80%.
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Mr. Gasket – Rear Main Seal Gasket (Part No.1963)

Rear Main Seal Gasket

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$42.49
This Mr. Gasket Rear Main Seal is made from silicone to allow the seal to handle extreme engine oil temperature. It also provides for an upgrade for that leaky rope style seal and is a direct replacement for a rubber main seal. It’s also injection molded for a precise fit.

Product Features:
  • Repairs That Leaky Rear Main Sail
  • Silicone Rubber to Withstand Extreme Engine Oil Temperatures
  • Upgrade for Rope Seal Equipped Cars or Direct Replacement for Rubber Main Seal
  • Injection Molded for Precise Fit
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Dorman – Pik-a-Nut – Steel Cup Expansion Plug 1-9/16 In., Height 0.380 (Part No.362518.1)

Steel Cup Expansion Plug 1-9/16 In., Height 0.380

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$2.29
This engine expansion plug is designed to match the fit and function of the original part on specified vehicles. Made of quality materials, it is engineered for reliable performance.

Product Features:
  • Direct replacement – this engine expansion plug matches the fit and function of the factory part on specified years, makes and models
  • Ideal solution – this plug is a reliable replacement for an original part that is missing or has failed due to fatigue
  • Durable construction – this part is made from quality materials to ensure reliable performance and long service life
  • Trustworthy quality – backed by team of product experts in the United States and more than a century of automotive experience
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1991 Mercury Cougar Engine Parts

You count on your 1991 Mercury Cougar to run right. That means taking care of it with regular maintenance, necessary repairs, and the right parts. Advance Auto Parts can help with all of that thanks to our extensive inventory of trusted Engine Parts. With 207 Engine Parts ranging in price from $0.43 to $5,877.99, you’re sure to find everything you need for your 1991 Mercury Cougar.

Brands matter. If you want to shop a specific Engine Parts brand, we stock 24 different brands like FELPRO, Dorman, and Sealed Power. 1991 Mercury Cougar Engine Parts start as low as $0.43!

One of the best ways to find top quality OEM or aftermarket Engine Parts is by asking professionals. Short of that, you can shop with confidence thanks to our 858 extensive product reviews on 1991 Mercury Cougar Engine Parts. Some of the top-rated Engine Parts products we carry are Oil Seal with 4.9 stars and Street Performance Harmonic Balancer; 161.5mm Diameter with 4.7 stars.

Did we mention you can order your Engine Parts from our online catalog and have them shipped right to your garage? Or, if you feel like seeing the parts first-hand, search for your nearest Advance Auto Parts location above and pick up in-store when you’re ready. Browse our full Engine Parts inventory for your 1991 Mercury Cougar below to get started!

Top-Rated Engine Parts Brands For Your 1991 Mercury Cougar

Trusted Engine Parts OEM and aftermarket product brands are what Advance Auto Parts specializes in. The brands we work with are sure to keep that 1991 Mercury Cougar running right for years to come. In our inventory you’ll find brands like FELPRO, Dorman, Sealed Power, and even more.

Popular Carquest Premium Engine Parts

You’ll find popular Carquest Premium brand products across Engine Blocks and Engine Timing Parts. All are waiting to get your 1991 Mercury Cougar back on the road. Some of the top-rated Carquest Premium products in these categories are:
Oil Filler Cap
from $10.49
(1)
Oil Filler Cap
Oil Caps
Timing Set, 3-Piece
from $29.99
(7)
Timing Set, 3-Piece
Timing Sets

FAQs for 1991 Mercury Cougar Engine Parts

What are the most purchased Engine Parts for the 1991 Mercury Cougar?

Out of 207 Engine Parts for the 1991 Mercury Cougar, the most popular in our inventory are:
Engine Crankshaft Seal Kit
from $34.99
(15)
Engine Crankshaft Seal Kit
Crankshaft Seals
Engine Valve Lifter
from $15.79
(3)
Engine Valve Lifter
Engine Valve Lifters
VALVE COVER GASKET SET
from $25.99
(20)
VALVE COVER GASKET SET
Valve Cover Gaskets

What are the top-rated 1991 Mercury Cougar Engine Parts?

Top-rated Engine Parts for your 1991 Mercury Cougar based on customer reviews/ratings are:
Oil Seal
from $10.79
(62)
Oil Seal
“worked great”
Street Performance Harmonic Balancer; 161.5mm Diameter
from $132.99
(38)
Street Performance Harmonic Balancer; 161.5mm Diameter
“Top of the line”
Engine Crankshaft Seal Kit
from $29.99
(18)
Engine Crankshaft Seal Kit
“Great product.”