GS - 2nd Gen (1998-2005) Discussion about the second generation GS300, GS400 and GS430 (1998 - 2005)

Valve Cover Gasket

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Old 10-27-08, 10:22 AM
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sleeperGS
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Default Valve Cover Gasket

Does anyone have or knows where I can find DIY instructions on replacing a valve cover gasket?
Old 10-27-08, 10:57 AM
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Debonair
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Year? GS300? GS400? GS430?


Old 10-27-08, 12:21 PM
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lexus ASM
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hope its a gs300...
Old 10-27-08, 01:17 PM
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sleeperGS
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1998 gs300
Old 10-28-08, 02:10 AM
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JeffTsai
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You're gonna have some fun on this project
It involves removing the intake, then remove the throttle body, remove y-pipe. Then remove all the screws and bolts on the valve covers and then they should pull off. You will have to reapply silicone sealant on the front on the first camshaft cap. For me it's about a 45min-1hr job and I've done this many many times. For a first timer expect to spend a few hours figuring out where all the stuff is

I actaully just did this for someone else this past weekend. I should of taken pictures so I can write a DIY guide, but I was too busy doing the whole 90k service maintenance. I didn't get a chance to take any pictures which I kinda regret. Oh well, there's always a next time.
Old 10-28-08, 06:07 AM
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cxp2001
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I'm planning to do this soon myself. Good Luck with everything. If I decide to do the job, I'll take some pictures..
Old 11-20-08, 05:41 AM
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Kenyon
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Anybody know the process for a GS400? I found an oil leak coming from the root of the valve cover gasket.
Old 11-20-08, 07:56 AM
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If its just a small tiny leak, clean up around the valve cover well with engine degreaser, and retorque valve cover bolts. Then inspect if the leak reappears.
Old 11-20-08, 10:38 AM
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Originally Posted by cxp2001
I'm planning to do this soon myself. Good Luck with everything. If I decide to do the job, I'll take some pictures..
I retorqued my bolts (well the ones could get to without removing the intake) which were 3 bolts on each cover. I cleaned off the engine and I haven't seen the oil leaking on the water pump anymore.
Old 11-20-08, 11:14 AM
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JoelGs
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Check to make sure that there is no crack on the oil hose. You'll have fun by doing this yourself, it's an exciting experience..Take some pics so that you'll remember to diy next time..
Old 11-20-08, 03:27 PM
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Originally Posted by Kenyon
Anybody know the process for a GS400? I found an oil leak coming from the root of the valve cover gasket.
Soon as I have time, I'll post a diy, I just got my gaskets in. Don't hold your breath, as I work 7 day's a week. I figure within the next 2 weeks
Old 11-21-08, 07:08 AM
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Originally Posted by lexus ASM
hope its a gs300...

It seems like the 400 is a big problem.
I Think I am having this problem. The car is running fine. That's why I don’t think is the head gaskets. The car is not blowing any smoke.
Only the engine bay is blowing smoke, but that is due to the oil dripping somewhere on the exhaust manifold or pipes.

I would imagine that is not a DIY job. I actually would not want to mess with my car right now. It is like 30 degrees out here.

Any help or suggestions would be highly appreciated.
Old 12-02-08, 09:35 AM
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gsproject
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Any posts on how to change a valve cover gasket on a 400 yet?
My is leaking right on the front driver-side
Old 12-05-08, 07:59 AM
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I though I was having a leak from the valve covers. But I was not. Anyways they were all loose. Just take a ratchet and a 10 mill socket and tighten them. It is very easy to do. If that does not fix the problem then you need new gaskets.
Old 12-20-08, 09:28 AM
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Does anyone know the torque spec on these bolts?
If I remember I think it was something like 4.3 ft lbs


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