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Timing housing head gasket damage

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Old May 3, 2020 | 01:03 PM
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2.5yotas's Avatar
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Timing housing head gasket damage

I have a 1989 Toyota pickup 22re with 1992 pre augest motor and transmission. I was removing the timing chain housing and I had a paper think piece of head gasket stick to the cover. I'm doing a clutch kit, timing chain,

main seals on engine, input shaft transission seal and pinion seals. With this being said I'm not interested in removing the head, I'd like to save that for another time and include a head redo with it. Will the head gasket be salvageable? Can I do rtv on it or cut a piece of different head gasket and and put that on timing chain cover?
Also doing water pump, oil pan gasket, and the timing chain cover gaskets. Do I need rtv on any of those items and where? I've read through many post on these things but need some advice on these issues. I've ran across two very good write ups one talks about rtv the other doesn't mention it Just wanted to know what everyone else does.
Not sure if I'm posting in the right spot either.
btw you all are amazing at this Toyota stuff I've got screen shots torque specs and info out my ears from just reading posts. Thanks for all of that and for any answers you give me.

Last edited by 2.5yotas; May 3, 2020 at 01:15 PM.
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Old May 3, 2020 | 02:03 PM
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Nope, not a piece of head gasket. It's a piece of timing chain cover gasket. If you get a new gasket for the timing chain cover, which you pretty much must do, you'll see it's just a paper gasket. I am pretty sure you're supposed to RTV both sides of it when you install it. RTV one side, stick it to the timing chain cover and let it set up. After it's set up, RTV the other side, let it set skinned, and install the cover.

Does this help?
Pat☺
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Old May 3, 2020 | 03:42 PM
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It does help. I bought that gasket kit. I bought 140$ worth of gaskets lol.

Last edited by 2.5yotas; May 3, 2020 at 08:20 PM.
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Old May 4, 2020 | 11:10 AM
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Originally Posted by 2.5yotas
It does help. I bought that gasket kit. I bought 140$ worth of gaskets lol.
Yeah, doing major work always needs a lot of gaskets. Since they're not reusable, the more you take apart, the more gaskets you'll need to put it all back together. And non-reusable means that if you put two somethings together, then realize you messed up, or whatever, and have to take them apart again...poof! New gasket.

Make certain you have all your ducks in a row before putting things back together
Gaskets can add up quick. That goes for o-rings, too. Non-reusable. Like the ones on the injectors, for example.

Good fortune to you!
Pat☺
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Old May 4, 2020 | 05:00 PM
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Wait, back up just a minute....

If the gasket part that came down was on the top of the timing chain cover, that IS the head gasket. You may have damaged the head gasket beyond repair.

If the gasket was sticking to the sides of the cover and not the top, those are the timing chain cover gaskets.

The factory manual just states to use a Form In Place Gasket (RTV) on the seam where the block and timing cover come together, before a head gasket is installed.

Personally, if I needed to remove the timing cover, the head and oil pan are both coming off, just like the factory procedure shows. I find it too risky not to remove both and hope that everything seals up just fine. People have successfully done it, but with my luck, I know that I would be doing the job again in short order.

Here is the factory procedure for a timing chain replacement: http://htftp.offroadsz.com/marinhake.../8timingch.pdf



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Old May 4, 2020 | 08:23 PM
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Yes it's the head gasket. I did not remove the head because I heard that sometimes a head will form to a gasket and if you dont have it plained it it could damage the head. That makes sense to me but not sure if that applies to 22re Yotas. What's your experience? Also figured if it leaked oil I'll pull the head, if not I'm lucky. I don't think it will be doing damage if I test that theory.
Also was installing a rear main seal, it was a national ( I know that most of you will opt for a Yota seal and I'll get that tomarow) the seal felt like it went in too easy. How hard should that be to get into place?
Thanks for the instruction page.

Last edited by 2.5yotas; May 4, 2020 at 08:35 PM.
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