Results 1 to 4 of 4
Thread: 20R Front Main Seal
09-07-2008, 06:38 PM #1
- Join Date
- Feb 2006
- Denver, Co
20R Front Main Seal
I'm changing the front main seal on a 20R motor in a 1980 4x4 Truck. People say that if the seal is old, it will wear a groove in the crankshaft so getting a thinner seal is best so that it seals on an un-grooved part of the crank.
What engine/car will have a seal that will work?
P.S. Also, any idea what other seals commonly leak on this engine other than the valve cover (already doing that too)? Thanks
Sponsored Links Remove Advertisements
09-08-2008, 10:16 AM #2
Use the late model 22RE seal (pn 90311-45014). It changes where the seal rides on the pulley so that you're running on a new surface. I'd go ahead and replace the oil pump o-ring while I'm there. As for leaks...oil pans are pretty common on the 20R, especially around the drain plug area, but outside of that they were a pretty good oil retainer. Leaky valve covers are due to substandard parts (Felpro for instance) or just being on there tooooo long.
Main Seal $11.47
Oil Pump O-Ring $8.08
09-11-2008, 06:20 AM #3
My dad used to have an '80 4X4 truck too. The distributor O-ring got hard with age and leaked, so you may want to check/replace that, too.
Thanks for that info on the front seal, Mark!
Dan (DragonLady's husband) *RIP Tyler (2yo son lost to cancer)
1986 P-type (Ruffian) black 6M 5 speed (formerly Lexusboy's), sitting.
1986 P type MKII 2tone night blue met/silver met. 5MGE auto, waiting for summer.
2005 Dodge Magnum Magnesium Pearl - new family car!
2000 Chrysler Town & Country - Charcoal, family/stuff hauler
09-11-2008, 02:37 PM #4
NP...and yes, Distributor O-rings can go bad, but not nearly as often as front main seals do on this particular application.Mark
Gear in this thread - Powered by O'Reilly Auto Parts
Users Browsing this Thread
There are currently 1 users browsing this thread. (0 members and 1 guests)