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Old 03-15-2011, 12:52 AM   #1
gaitski
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Default Oil in Spark Plug Wells

So I've got a ton of oil in my spark plug wells, enough to submerge all 6 of my plugs. I've researched around this and other forums and think I've got it; I'm replacing my valve cover gaskets and No. 3 cylinder head cover bolts with new gaskets, which seems to cover both possibilities of where the oil's coming up from.

My question is about the No. 3 cylinder head cover. Is that just the plate that's running down between the two valve covers? If that's what it is, mine is in rough shape as you can see from the photo It's been flaking off and getting everywhere.

I got the info about the No. 3 head cover and bolts from this post, can anyone tell me if I'm on the right track or forgetting something major? This is really my first venture into engine work. Thanks much!

Couldn't get the photo to embed, so here's a link if anyone's interested: http://flickr.com/gp/25598754@N00/LGGe58
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Old 03-15-2011, 01:39 AM   #2
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Yes you are on the right track. You can do away with the No. 3 cover if you wish and use some sort of sealer on the treads that is compatable with oil to seal the allen head plugs. Also if you didn't see it already:

http://www.toyota-supra.info/forums/...ng-in-oil.html
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Old 03-15-2011, 01:39 AM   #3
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The cover in the middle is just for looks. When my motor was rebuild Mine was flaKing to so They just left it off.
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Old 03-15-2011, 02:26 AM   #4
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Thanks for the quick replies guys, one more quick question; are the gaskets connecting the air intake > throttle body > y-pipe re-usable, or do I need to replace them?
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Old 03-15-2011, 02:27 AM   #5
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No they are not reusable.
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Old 03-15-2011, 02:59 AM   #6
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The #3 cover is NOT for looks! New, it's a rubber coated gasket with a steel core, as it ages the plastic hardens and cracks. It is there as a backup against the valve cover seals leaking oil to prevent it from draining down there. It's also there to keep out debris (fine dirt and sand) from getting in where you cannot reach it to clean it out when you go to pull the spark plugs... sand and other grit in the cylinder is.... anyone? anyone?..... BAD!

Jebus... the shit people decide is "just there for looks" is amazing... the whole engine bay looks like a cluttered disaster and you think they're worried about a galley which you can't see unless the ENTIRE intake has been removed? Are you f@#$ing serious?

Oh, and the #3 IS the gasket for those 4 plugs.

The gasket for the throttle body (the factory one) is a multilayer steel gasket and you bet your tooshy it's reusable. The paper ones may be reused, but I recommend a very light spray gasket dressing if you're intent on reusing them.

That's it. I quit. Have fun misleading each other... Here's one more good one about the #3 which hasn't been mentioned: "It's useless and you'll get some weight reduction from removing it." HAH!!! That's an old favorite.



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Old 03-15-2011, 04:40 AM   #7
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Thanks Cre, so you'd recommend replacing the #3 itself and not worrying about individual gaskets for the four 14mm bolts?
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Old 03-15-2011, 05:27 AM   #8
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Show me where in Toyota's parts catalog they list individual gaskets for those bolts please, because I've been missing it...

Here's the page:
http://www.cygnusx1.net/Supra/Librar...spx?F=1104&P=1

Do whatever you like, just do it with an understanding as to why or why not you are really doing it.
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Old 03-15-2011, 01:36 PM   #9
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Yeah, I want to understand what I'm doing as well. You're right, I wouldn't expect to find the individual bolt gaskets in the Toyota catalog. I read on the post that I linked in my first post that the #3 cover has a built in gasket that seemed (to that guy) to be a bad design. He recommended bringing one of those 14mm bolts in to the parts shop and matching it up with an oil plug gasket since that's where the oil is coming up from.

I appreciate your responses, I'm definitely new to this and would like to get different opinions. Thanks again!
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Old 03-15-2011, 10:08 PM   #10
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The only thing on them for a gasket is a crush washer like the type used for an oil drain plug. If you use the use some sort of liquid gasket on the threads before you reinstall them they won't leak anymore. But as for the need of the cover, I don't understand why cre would get so upset. I don't use mine anymore so I can see if any of the plugs do start to leak again. But the cover does not stop oil or coolant from still getting in the valley and besides there is nothing that the cover covers that is that important. Also what debris is going to get in there anyway unless you are driving offroad with the hood off.
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