




⚙️ Upgrade your engine’s heartbeat with precision and durability!
The Dorman 635-502 Engine Timing Cover is a direct replacement part designed to perfectly fit select Chevrolet, GMC, Oldsmobile, and Workhorse models from 1995 to 2007. Constructed from durable, heat-resistant plastic, it ensures long-lasting performance under extreme engine conditions. Tested extensively for quality and fit, this cover offers a reliable, OEM-grade solution backed by over a century of Dorman’s automotive expertise. Its ready-to-paint black finish allows for seamless customization, making it the smart choice for professional repairs or upgrades.





| Brand | Dorman |
| Color | Black |
| Material | Plastic |
| Exterior Finish | Ready To Paint If Needed |
| Item dimensions L x W x H | 12.38 x 10.38 x 2.38 inches |
| Vehicle Service Type | Car, Truck |
| Style | Modern |
| Item Weight | 1.4 Pounds |
| Automotive Fit Type | Universal Fit |
| OEM Part Number | 103073; 103074; 500262; 500262WO; 10077964; 12554555; 12554557; 89017259; 89017261; 93445880 |
| Manufacturer | Dorman Products |
| UPC | 019495065609 |
| Global Trade Identification Number | 00019495065609 |
| Model | 635-502 |
| Item Weight | 1.4 pounds |
| Product Dimensions | 12.38 x 10.38 x 2.38 inches |
| Item model number | 635-502 |
| Manufacturer Part Number | 635-502 |
| Hollander Number | 308-434 |
C**F
no problems with the product or delivery
well made, BUT difficult to install without dropping the oil pan.
M**K
Quality
High quality.
P**D
What I need to do to job
Was made of good product
D**6
Great fitment
Just be sure to add gasket sealer at the bottom and lower sides. Popped right on
T**E
Worked as intended
Appreciate the crank sensor plug since it was going in a boat with no crank sensor. So much more expensive than just buying a seal though, no idea why GM switched to one-time use timing covers.
M**Y
It already has a seal on it
It fit perfectly
S**
Worked
It worked
S**R
DOES NOT FIT CORRECTLY '98 GMC Jimmy 4.3 Vortec
One star is too high. Thumbs down/finger up.-It didn't fit. Period, hard stop.The bolt holes BARELY lined up enough to get them in, and only the rubber grommets allowed that much flexibility.The lower sealing face didn't fit, by almost halfan inch total... quarter inch on each side. I had to trim it that much and it barely fit at that.To make sure it sealed, I had to use black RTV... and I hate the stuff.I'll never buy from this brand again.
Trustpilot
2 months ago
3 weeks ago