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1994 Lexus GS 300 Repair Question


Topics covered: Engine, Timing chain, Camshaft.
Mileage: 200,000 miles.

Asked on October 13, 2012

How do you change all the front oil seals on the 1994 GS 300 Lexus

1994 Lexus GS300 4 dr 3.0L engine has bad oil leaks in the front of the engine both sides of the #1 and number 2 timing chain covers where they join. Everything I have read says it is the tension pulley gasket which is leaking. Looking at it how do you get it off for inspection special tools needed? Timing chain/ belt was done at 221,000 miles by local Firestone dealer then car sat for 3 years not being driven at all could they have not properly seated the lower seals? The tensioner pulley assembly looks like the original one that came with the car
Avatar Asked by Captto627

Answer

Replied on October 13, 2012

3 years?? no fault there. the seals hardened up from sitting.

yes, pullers will be required for this job. very complicated and if you have no experience at this, you are better off letting a shop do it for you.

Roy

Tiny Answered by ASEMaster6371 (expert)
24,845 answers provided
Replied on March 19, 2013

Have all front of engine removed how do I remove oil seals at camshaft- 2 and main pulley on oil seal? Harmonic balancer was leaking too upon inspection ordered a new one. I must admit the crankshaft bolt was ridiculous to remove even my CP twin hammer 3/4" drive 1000 lb ft torque woud not budge it.

Tiny Response from Captto627
4 questions asked
Replied on March 25, 2013

OK All new front oil seals replaced 2 of which crumbled when being removed. I am almost done re assembling the engine. My question is: As long as all 3 timing marks are set to 0 degrees with dual overhead cams can engine be 180 degrees out? I am not certain about bottom crank it may have been rotated without movement of the cams while the timing belt was off I have included pics of the timing marks they show that they are a hair off but they all are at 0 when rotated.

Tiny Response from Captto627
4 questions asked