Got oil on top of your spark plugs??

[IHateHacks]

Hopefully this gets sticky'd. There seems to be some debate over WHERE the oil comes from. I'm here to settle this once and for all, as I am tired of replying over and over again to this simple problem that anyone can repair very easily.

First of all, many DOHC engines have spark plug well seals. This, however, is not the case on the 87-92 7M engine.

Please refer to my custom diagram. When it says (color, shape) that is what I'm talking about. Pretty straight forward.



Go buy a 14mm allen head socket from napa. Take the No.3 cyl head cover off and throw it into the garbage. Now divert your attention to my shitty diagram:
If you have oil here (green arrows) then it is possibly coming from 2 places. Everyone says, "It's coming from the valve cover gaskets" (red boxes) which, I too thought when I was new to supras. So I replaced the valve cover gaskets, yet the oil was still "appearing" in the spark plug gallery. Not as much as before, but it was still appearing. No track marks from where it was coming from, just a puddle. It was very frustrating. I then discovered (through no help of any forum, they all said it was valve cover gaskets) that the No. 3 cylinder head cover BOLTS (yellow circles) were leaking. They are 14 mm allen head. You can A. Go to the dealer and get a new No.3 cylinder head cover (its a cover AND a gasket all in one, bad design) or B. bring 1 of your 14mm allen head bolts to an auto parts store and match up an oil drain plug gasket that fits. That's what I did, I used red ones (yellow circles), cuz it matches the red lines on the valve covers.

Hope this helps.

[mrnickleye]

Very well done ^^^.
Also, if you want to keep the old #3 gasket/cover on the motor,(and not pay the $38 for a new one), you can apply a little silicone gasket sealer (or FIPG) at those big threaded plugs.

Note: if enough oil leaks into the spark plug boot area, it will start causing misfires.

[grygst76]

so can you help us a little further and tell us what the part number or size of those gaskets are??? I am having that problem myself and I feel it is more then the valve cover gaskets!!!

[motosparky]

I agree, if you have anymore data it would be helpful.
I like to have all I need before tear down because my son has kidnapped my truck so its tougher to run errands with the SUP : )
THX !

[IHateHacks]

I don't know what the part number for the no.3 cylinder head gasket is, because I didn't replace mine I threw it in the garbage because that is what it is- garbage.

Since you asked, I went to NAPA and got 4 gaskets Part # 704-1076.

Wow, I thought you guys had enough sack to bring 1 of your 14mm allen head bolts to a parts store and figure it out for yourself, I had to. I guess I have to spoon feed information to you people.

Anything else I can help you with?

[grygst76]

Originally Posted by IHateHacks

I don't know what the part number for the no.3 cylinder head gasket is, because I didn't replace mine I threw it in the garbage because that is what it is- garbage.

Since you asked, I went to NAPA and got 4 gaskets Part # 704-1076.

Wow, I thought you guys had enough sack to bring 1 of your 14mm allen head bolts to a parts store and figure it out for yourself, I had to. I guess I have to spoon feed information to you people.

Anything else I can help you with?

Right,

I like being spoon fed, so when I go to do a job, I have everything at one time,not running back and forth to the store every 3 seconds; thanks for the help, I think.

[IHateHacks]

Let me know when your head gasket blows, I got all the part numbers you need buddy.

[88Tsupra]

i got oil showing up on top of my valve cover

[grygst76]

Originally Posted by IHateHacks

Let me know when your head gasket blows, I got all the part numbers you need buddy.

Jeez, you offer to help by telling people what you did to fix it, then I ask another question and you get pissed off, so why help in the 1st place?? If my HG blows then so be it, I'll just put another motor in and be done with it. If i decide to replace the headgasket, I will already know what i need by the fine and helpful people in these forums, Thanks for all your help with the gaskets and the pretty diagram...

[IHateHacks]

Most of the people here never repaired a head gasket themselves before. They just bring it to a shop and then walk around like they know how to do it. The 2% that have done it before don't have the part numbers on hand nor do they care about sharing that infomation. Find me one post where someone listed part numbers for all the parts for a head gasket repair. Yeah, its more than just a head gasket and head bolts.

I go out of my way to get you guys part numbers, you think I get paid for this?

I'm sorry if I sounded pissed, because I'm not. I was just busting your balls about the spoonfeeding, trust me when I'm pissed you'll know it by the moderators editing my posts.

Have a nice day sir!