1991 Mack R Engine Cooling Parts
Keep Your 1991 Mack R in Top Shape with Quality Engine Cooling Parts
Whether you’re repairing or upgrading your Engine Cooling Part, using high-quality parts is key to keeping your 1991 Mack R looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Thermostats. Whether you’re replacing a damaged part or enhancing your truck’s style and protection, you’ll find exactly what you need to get the job done right.
Competitive Prices and Extensive Inventory
The average price for a 1991 Mack R Engine Cooling Part at Advance Auto Parts is around $44.85, with a range that starts at $36.99 and goes up to $52.99. With 7 options in stock from one trusted brand, finding the right fit is easy. Popular picks like Heavy Duty Thermostat: With Seal, 190 Degrees, Heavy Duty Thermostat: With Seal, 190 Degrees, and Heavy Duty Thermostat: With Seal, 180 Degrees start at just $39.99 and offer a great balance of form and function.
Explore Related Parts
While you’re upgrading or replacing your Engine Cooling Part, don’t forget to check out other key components like Air Conditioning Parts and Blower Motor and Related Products. At Advance Auto Parts, we’re here to help you keep your 1991 Mack R in peak condition, inside and out.
Find Your Specific 1991 Mack R Engine Cooling Parts
Looking for the perfect Engine Cooling Part for your 1991 Mack R? You’re in the right place. Below, you’ll find links to various types of Engine Cooling Parts that fit your vehicle. At Advance Auto Parts, we offer only the highest quality OEM and aftermarket Engine Cooling Parts, ensuring durability and a precise fit for your Mack R. Whether you’re driving a 1991 model or another popular model year like
1981,
1982,
1983,
1984,
1985, and
1990, we’ve got you covered. Purchasing Engine Cooling Parts from Advance Auto Parts is a smart choice, giving you access to trusted brands and parts built to perform. Below, you’ll find links to various types of Engine Cooling Parts that fit your vehicle.
Essential 1991 Mack R Engine Cooling Parts
Carquest Premium – Heavy Duty Thermostat: With Seal, 170 Degrees (Part No.15197)
from
$52.99
Manufactured with OEM quality materials and safety standards by an OE Supplier. Stands up to even the most demanding automotive cooling systems. Manufactured with OEM specifications and processes. Copper case and wax compound assures rapid response to temperature changes in the coolant.
Product Features:
See More
Product Features:
- High grade stainless steel and copper construction
- Meets or exceeds OEM standards
- Consistent and precise response to cooling system needs
- Original equipment design for worry-free direct fit replacement
- 100% tested and calibrated
Carquest Premium – Heavy Duty Thermostat: 180 Degrees (Part No.14838)
from
$21.99
Carquest Premium Thermostats are manufactured with OEM quality materials and safety standards by an OE Supplier. This thermostat will meet and exceed the expectations of the OE thermostat to insure the best product for your cooling system. Stands up to even the most demanding automotive cooling systems. Manufactured with OEM specifications and processes. Copper case and wax compound assures rapid response to temperature changes in the coolant. Offset design, air relief valve, and OEM style seals included where applicable.
Product Features:
See More
Product Features:
- High grade stainless steel and copper construction
- Meets or exceeds OEM standards
- Consistent and precise response to cooling system needs
- Original equipment design for worry-free direct fit replacement
- 100% tested and calibrated
Carquest Premium – Heavy Duty Thermostat: With Seal, 180 Degrees (Part No.14538)
from
$38.99
Carquest Premium Thermostats are manufactured with OEM quality materials and safety standards by an OE Supplier. This thermostat will meet and exceed the expectations of the OE thermostat to insure the best product for your cooling system. Stands up to even the most demanding automotive cooling systems. Manufactured with OEM specifications and processes. Copper case and wax compound assures rapid response to temperature changes in the coolant. Offset design, air relief valve, and OEM style seals included where applicable.
Product Features:
See More
Product Features:
- High grade stainless steel and copper construction
- Meets or exceeds OEM standards
- Consistent and precise response to cooling system needs
- Original equipment design for worry-free direct fit replacement
- 100% tested and calibrated
Carquest Premium – Heavy Duty Thermostat: With Seal, 170 Degrees (Part No.14537)
from
$52.99
Manufactured with OEM quality materials and safety standards by an OE Supplier. Stands up to even the most demanding automotive cooling systems. Manufactured with OEM specifications and processes. Copper case and wax compound assures rapid response to temperature changes in the coolant.
Product Features:
See More
Product Features:
- High grade stainless steel and copper construction
- Meets or exceeds OEM standards
- Consistent and precise response to cooling system needs
- Original equipment design for worry-free direct fit replacement
- 100% tested and calibrated
Carquest Premium – Heavy Duty Thermostat: With Seal, 190 Degrees (Part No.14239)
from
$41.99
Carquest Premium Thermostats are manufactured with OEM quality materials and safety standards by an OE Supplier. This thermostat will meet and exceed the expectations of the OE thermostat to insure the best product for your cooling system. Stands up to even the most demanding automotive cooling systems. Manufactured with OEM specifications and processes. Copper case and wax compound assures rapid response to temperature changes in the coolant. Offset design, air relief valve, and OEM style seals included where applicable.
Product Features:
See More
Product Features:
- Consistent and precise response to cooling system needs
- Original equipment design for worry-free direct fit replacement
- 100% tested and calibrated
- High grade stainless steel and copper construction
- Meets or exceeds OEM standards
Carquest Premium – Heavy Duty Thermostat: With Seal, 180 Degrees (Part No.15198)
from
$55.99
Manufactured with OEM quality materials and safety standards by an OE Supplier. Stands up to even the most demanding automotive cooling systems. Manufactured with OEM specifications and processes. Copper case and wax compound assures rapid response to temperature changes in the coolant.
Product Features:
See More
Product Features:
- High grade stainless steel and copper construction
- Meets or exceeds OEM standards
- Consistent and precise response to cooling system needs
- Original equipment design for worry-free direct fit replacement
- 100% tested and calibrated
Carquest Premium – Heavy Duty Thermostat: With Seal, 190 Degrees (Part No.14539)
from
$39.99
Carquest Premium Thermostats are manufactured with OEM quality materials and safety standards by an OE Supplier. This thermostat will meet and exceed the expectations of the OE thermostat to insure the best product for your cooling system. Stands up to even the most demanding automotive cooling systems. Manufactured with OEM specifications and processes. Copper case and wax compound assures rapid response to temperature changes in the coolant. Offset design, air relief valve, and OEM style seals included where applicable.
Product Features:
See More
Product Features:
- Consistent and precise response to cooling system needs
- Original equipment design for worry-free direct fit replacement
- 100% tested and calibrated
- High grade stainless steel and copper construction
- Meets or exceeds OEM standards
Carquest Premium – Heavy Duty Thermostat: With Seal, 180 Degrees (Part No.15228)
from
$50.99
Carquest Premium Thermostats are manufactured with OEM quality materials and safety standards by an OE Supplier. This thermostat will meet and exceed the expectations of the OE thermostat to insure the best product for your cooling system. Stands up to even the most demanding automotive cooling systems. Manufactured with OEM specifications and processes. Copper case and wax compound assures rapid response to temperature changes in the coolant. Offset design, air relief valve, and OEM style seals included where applicable.
Product Features:
See More
Product Features:
- High grade stainless steel and copper construction
- Meets or exceeds OEM standards
- Consistent and precise response to cooling system needs
- Original equipment design for worry-free direct fit replacement
- 100% tested and calibrated
Carquest Premium – Heavy Duty Thermostat: With Seal, 160 Degrees (Part No.14536)
from
$36.99
Manufactured with OEM quality materials and safety standards by an OE Supplier. Stands up to even the most demanding automotive cooling systems. Manufactured with OEM specifications and processes. Copper case and wax compound assures rapid response to temperature changes in the coolant.
Product Features:
See More
Product Features:
- High grade stainless steel and copper construction
- Meets or exceeds OEM standards
- Consistent and precise response to cooling system needs
- Original equipment design for worry-free direct fit replacement
- 100% tested and calibrated
Carquest Premium – Heavy Duty Thermostat: 190 Degrees (Part No.14839)
from
$17.49
Carquest Premium Thermostats are manufactured with OEM quality materials and safety standards by an OE Supplier. This thermostat will meet and exceed the expectations of the OE thermostat to insure the best product for your cooling system. Stands up to even the most demanding automotive cooling systems. Manufactured with OEM specifications and processes. Copper case and wax compound assures rapid response to temperature changes in the coolant. Offset design, air relief valve, and OEM style seals included where applicable.
Product Features:
See More
Product Features:
- High grade stainless steel and copper construction
- Meets or exceeds OEM standards
- Consistent and precise response to cooling system needs
- Original equipment design for worry-free direct fit replacement
- 100% tested and calibrated
Carquest Premium – Heavy Duty Thermostat: With Seal, 190 Degrees (Part No.15229)
from
$51.99
Carquest Premium Thermostats are manufactured with OEM quality materials and safety standards by an OE Supplier. This thermostat will meet and exceed the expectations of the OE thermostat to insure the best product for your cooling system. Stands up to even the most demanding automotive cooling systems. Manufactured with OEM specifications and processes. Copper case and wax compound assures rapid response to temperature changes in the coolant. Offset design, air relief valve, and OEM style seals included where applicable.
Product Features:
See More
Product Features:
- Consistent and precise response to cooling system needs
- Original equipment design for worry-free direct fit replacement
- 100% tested and calibrated
- High grade stainless steel and copper construction
- Meets or exceeds OEM standards
Popular 1991 Mack R Engine Cooling Parts Categories
Most Popular Thermostats for 1991 Mack Rs
Enhance your 1991 Mack R with one of the 7 Thermostats we have in stock, starting at just $36.99.
Carquest Premium – Heavy Duty Thermostat: With Seal, 190 Degrees (Part No.14539)
from
$39.99
Carquest Premium Thermostats are manufactured with OEM quality materials and safety standards by an OE Supplier. This thermostat will meet and exceed the expectations of the OE thermostat to insure the best product for your cooling system. Stands up to even the most demanding automotive cooling systems. Manufactured with OEM specifications and processes. Copper case and wax compound assures rapid response to temperature changes in the coolant. Offset design, air relief valve, and OEM style seals included where applicable.
Product Features:
See More
Product Features:
- Consistent and precise response to cooling system needs
- Original equipment design for worry-free direct fit replacement
- 100% tested and calibrated
- High grade stainless steel and copper construction
- Meets or exceeds OEM standards
Carquest Premium – Heavy Duty Thermostat: With Seal, 190 Degrees (Part No.15229)
from
$51.99
Carquest Premium Thermostats are manufactured with OEM quality materials and safety standards by an OE Supplier. This thermostat will meet and exceed the expectations of the OE thermostat to insure the best product for your cooling system. Stands up to even the most demanding automotive cooling systems. Manufactured with OEM specifications and processes. Copper case and wax compound assures rapid response to temperature changes in the coolant. Offset design, air relief valve, and OEM style seals included where applicable.
Product Features:
See More
Product Features:
- Consistent and precise response to cooling system needs
- Original equipment design for worry-free direct fit replacement
- 100% tested and calibrated
- High grade stainless steel and copper construction
- Meets or exceeds OEM standards
Carquest Premium – Heavy Duty Thermostat: With Seal, 180 Degrees (Part No.15228)
from
$50.99
Carquest Premium Thermostats are manufactured with OEM quality materials and safety standards by an OE Supplier. This thermostat will meet and exceed the expectations of the OE thermostat to insure the best product for your cooling system. Stands up to even the most demanding automotive cooling systems. Manufactured with OEM specifications and processes. Copper case and wax compound assures rapid response to temperature changes in the coolant. Offset design, air relief valve, and OEM style seals included where applicable.
Product Features:
See More
Product Features:
- High grade stainless steel and copper construction
- Meets or exceeds OEM standards
- Consistent and precise response to cooling system needs
- Original equipment design for worry-free direct fit replacement
- 100% tested and calibrated
Carquest Premium – Heavy Duty Thermostat: With Seal, 190 Degrees (Part No.14239)
from
$41.99
Carquest Premium Thermostats are manufactured with OEM quality materials and safety standards by an OE Supplier. This thermostat will meet and exceed the expectations of the OE thermostat to insure the best product for your cooling system. Stands up to even the most demanding automotive cooling systems. Manufactured with OEM specifications and processes. Copper case and wax compound assures rapid response to temperature changes in the coolant. Offset design, air relief valve, and OEM style seals included where applicable.
Product Features:
See More
Product Features:
- Consistent and precise response to cooling system needs
- Original equipment design for worry-free direct fit replacement
- 100% tested and calibrated
- High grade stainless steel and copper construction
- Meets or exceeds OEM standards
Carquest Premium – Heavy Duty Thermostat: With Seal, 160 Degrees (Part No.14536)
from
$36.99
Manufactured with OEM quality materials and safety standards by an OE Supplier. Stands up to even the most demanding automotive cooling systems. Manufactured with OEM specifications and processes. Copper case and wax compound assures rapid response to temperature changes in the coolant.
Product Features:
See More
Product Features:
- High grade stainless steel and copper construction
- Meets or exceeds OEM standards
- Consistent and precise response to cooling system needs
- Original equipment design for worry-free direct fit replacement
- 100% tested and calibrated
Carquest Premium – Heavy Duty Thermostat: With Seal, 170 Degrees (Part No.14537)
from
$52.99
Manufactured with OEM quality materials and safety standards by an OE Supplier. Stands up to even the most demanding automotive cooling systems. Manufactured with OEM specifications and processes. Copper case and wax compound assures rapid response to temperature changes in the coolant.
Product Features:
See More
Product Features:
- High grade stainless steel and copper construction
- Meets or exceeds OEM standards
- Consistent and precise response to cooling system needs
- Original equipment design for worry-free direct fit replacement
- 100% tested and calibrated
Carquest Premium – Heavy Duty Thermostat: With Seal, 180 Degrees (Part No.14538)
from
$38.99
Carquest Premium Thermostats are manufactured with OEM quality materials and safety standards by an OE Supplier. This thermostat will meet and exceed the expectations of the OE thermostat to insure the best product for your cooling system. Stands up to even the most demanding automotive cooling systems. Manufactured with OEM specifications and processes. Copper case and wax compound assures rapid response to temperature changes in the coolant. Offset design, air relief valve, and OEM style seals included where applicable.
Product Features:
See More
Product Features:
- High grade stainless steel and copper construction
- Meets or exceeds OEM standards
- Consistent and precise response to cooling system needs
- Original equipment design for worry-free direct fit replacement
- 100% tested and calibrated
FAQs for 1991 Mack R Engine Cooling Parts
What are the best-selling Engine Cooling Parts for 1991 Mack Rs?
Out of 7 Engine Cooling Parts that fit 1991 Mack Rs, the following parts are the top sellers:
- Heavy Duty Thermostat: With Seal, 190 Degrees (15480034) – $39.99
- Heavy Duty Thermostat: With Seal, 190 Degrees (11330362) – $51.99
- Heavy Duty Thermostat: With Seal, 180 Degrees (11330194) – $50.99
What’s the price range for 1991 Mack R Engine Cooling Parts?
The prices of Engine Cooling Parts for the 1991 Mack R range from $36.99 up to $52.99 for the most premium parts.
What is the average price of an Engine Cooling Part for a 1991 Mack R?
The average price for Engine Cooling Parts for the 1991 Mack R is $44.85. Keep in mind the variety of part types within our Engine Cooling Part category, where you are likely to find a wide range of prices across a variety of parts and components.
Does Advance Auto Parts sell Engine Cooling Parts for other Mack R model years?
What are the cheapest Engine Cooling Parts for my 1991 Mack R?
The cheapest 1991 Mack R Engine Cooling Parts we carry are:
- Heavy Duty Thermostat: With Seal, 160 Degrees (20480066) – $36.99
- Heavy Duty Thermostat: With Seal, 180 Degrees (17650013) – $38.99
- Heavy Duty Thermostat: With Seal, 190 Degrees (15480034) – $39.99
- Heavy Duty Thermostat: With Seal, 190 Degrees (15480097) – $41.99
- Heavy Duty Thermostat: With Seal, 180 Degrees (11330194) – $50.99
Does Advance Auto Parts sell Engine Cooling Parts for any other 1991 Mack models?
Yes. We stock Engine Cooling Parts for 20 other popular 1991 Mack models. Some of the most popular are 1991 MS200P Mid-Liner Engine Cooling Parts, 1991 MS250P Mid-Liner Engine Cooling Parts, 1991 MS300P Mid-Liner Engine Cooling Parts, 1991 CS200P Mid-Liner Engine Cooling Parts, and 1991 CS250P Mid-Liner Engine Cooling Parts.
What types of Engine Cooling Parts do you sell for my 1991 Mack R?
We currently have just 1 Engine Cooling Part in stock for a 1991 Mack R, and as of 11/2/25, it is a Thermostat.
Can I get help with 1991 Mack R Engine Cooling Part orders?
Contact our customer support team by chat or phone, through the help desk page, where you can find instant answers about Mack Engine Cooling Parts and more.
What is your return policy for Mack R Engine Cooling Parts?
Advance Auto Parts keeps returns simple. For new Mack R Engine Cooling Parts and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.