15% OFF ORDERS $35+ | 20% OFF $100+ | ONLINE ONLY
USE CODE
CRUISE
*
Exclusions apply.
Advance Auto Parts Logo
Choose a Store
  • Shop All
  • Replacement Parts
  • Performance Parts
  • Accessories
  • Oil & Fluids
  • Special Offers
  • Advance Rewards
  • Advice & How-Tos
  • Project Guides
  • FAQ / Help Desk
Loading...
Share
Product thumb
Product thumb
Product main large

Dorman - Help Engine Coolant Reservoir Cap: Twist, Plastic, 1 Pack

(8 reviews)
Part # 82590
limited lifetime warranty
Loading...
Loading...
How Would You Like To Get This Item?

Store Pickup

Loading...Loading...Loading...

Same Day Home Delivery

Loading...Loading...Loading...

Home Delivery

Loading...Loading...Loading...
Loading...
Loading...
Loading...Loading...Loading...Loading...Loading...

Product Information

Product Details
Part No. 82590
Warranty Details (Limited Lifetime Warranty)
Cracked or lost the original engine coolant reservoir cap- Replace it seamlessly and effectively with this precisely engineered, direct replacement cap.

Product Features:
  • Direct replacement - this engine coolant reservoir cap directly replaces a cracked or lost original cap
  • Application specific - made to match dimensions of reservoir cap on only certain vehicle years, makes and models
  • Seamless fit - reverse-engineered from the original equipment to fit perfectly
  • Excellent value - a quick, easy replacement that's less expensive than going back to the dealership
Specifications
Attachment Type:
Twist On

Color:
Black

Diameter:
51.13 mm

Length:
1.059 in

Material:
Plastic

Pressure Release Lever:
No

Pressurized:
No

Type:
Twist

Vented:
Yes

Width:
2.013 in
Loading...
Loading...Loading...Loading...Loading...Loading...
4.5 out of 5
8 Customer Reviews
100% of respondents would recommend this to a friend
Ratings Distribution
5 Stars
7
4 Stars
0
3 Stars
0
2 Stars
0
1 Star
1
Pros
1
Easy To Install
1
Identical to OEM
Cons
1
none
Best Uses
1
Replacement
Describe Yourself
1
Auto Enthusiast
1
Classic Auto Restorer
1
Mechanic
Reviewed by 8 Customers
Exact replacement cap
Staff Reviewer -
Exact look, fit, and feel of the original 27 year old GM part I replaced. Cheap to replace if your original fiber gasket in the cap is gone or rotting.
Bottom Line Yes, I would recommend to a friend
Didn't Fit
Verified Buyer -
Did not fit my vehicle in spite of the of the assurance that it did.
easy fit
Verified Buyer -
fits and replaces the original
Bottom Line Yes, I would recommend to a friend
Hope I don't have to buy another one😱
Fit my 87 Chevy Silverado
Bottom Line Yes, I would recommend to a friend
Does the job
Verified Buyer -
Fits 83 cutlass
Loading...
Loading...Loading...Loading...Loading...Loading...
No results
Loading...
Loading...Loading...Loading...Loading...Loading...
Feedback
Be The First To Know About Deals And Promotions.
Plus, create an account to receive $5 off of $20 or more.
TOP REPLACEMENT PARTS
Brake Pads & Shoes
Brake Rotors
Alternators
Water Pumps
Starters
Brake Calipers

Order Lookup

Help Desk

Store Locator

In Store Services

Mobile App

CUSTOMER SUPPORT
Accessibility Statement
Contact Us
Forgot Password
Help Desk
In Store Pickup
In Store Services
Order Tracking
Recall Information
Return Policy
Same Day Delivery
© 2026 Advance Auto Parts
Privacy Policy
Terms of Use
Site Map
ADVANCING A WORLD IN MOTION®