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Old 05-17-2007, 03:18 PM   #11
IHateHacks
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Those 3 14mm allen head bolts right next to each set of spark plugs (1 0 1- 1 0 1- 1 0 1, 1= spark plug 0= 14mm allen head inbetween the plugs) hold coolant. Do not take those out unless you have coolant in your spark plug wells. I've never seen or heard of those 3 leaking though, so I wouldn't worry about them.

The no.3 cylinder cover is a gasket so you can't just take it off without using either another no.3 cylinder head cover or oil drain plug gaskets.
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Old 05-17-2007, 07:52 PM   #12
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okay cool, just wanted to double check.
thanks a bunch man, now i dont have any oil on top!
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Old 08-09-2007, 07:34 AM   #13
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does this apply to oil on the spark plug tip? the other day my ghetto rigged ic piping popped off. car ran super rich for about 20 feet until i could get to a gas station. after that, car was hesitating under load, thought it was knock so retarded the timing alot...no help. by proccess of elimination, must be a fouled plug right? went and dropped $70 on denso iridium plags and but them in. when i took the old shitty autolites out, plug #6's tip was covered in oil. it was kinda hard to tell where on the plug the oil was since my buddy kinda smeared it with his fingers. first time under load after denso install...same hesitiation. now, i dont have the spark plug socket with me right now but im pretty sure when i pop #6 off tomorrow, it will have oil on it. does this stickey apply???? thanks.
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Old 10-20-2007, 10:47 AM   #14
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Because they will bottom out if there is not a 2mm layer inbetween the 14mm allen head bolts and the cylinder head. You need to use either a new no.3 cylinder head cover or drain plug gaskets or you will strip the aluminum when you torque them to 13 ft/lbs.
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Old 11-03-2007, 03:23 PM   #15
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Currently in the middle of fixing this problem myself and need a little guidence i guess, read through all the posts and i think i understand what i need to do, picking up those gaskets on monday.


I took out the 4 14mm bolts things, now how do i remove the valve cover gasket? or does it just pop out, i didnt want to try and force it.

all i have currently removed is the 3000pipe, and that thortle thing and some IC pipes, do have have to remove the two black covers on the side with the red lines down it?
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Old 11-03-2007, 07:56 PM   #16
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theres one bolt towards the rear of the engine going through the gasket, if you havent removed that you need to, otherwise just pull the gasket out, if its catching anywhere then just figure out what its catching on and undo it. You just get rid of that gasket all together
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Old 01-31-2008, 04:26 AM   #17
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Maybe just dumb luck...but while doing my head gasket replacement, I also replaced (among many other things) the No. 3 cyl head cover with a new OEM ($52.00) from Toyota dealer. I felt at the time maybe this was a waste of money. But after reading these posts I think it was money well spent. No leaks. No problems. (and I run hard on road courses)

That elusive part number for this famous No. 3 cyl head cover I will donate to the cause for a Ron Paul vote...Toyota Part No. 11219-42020
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Old 02-02-2008, 01:55 AM   #18
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i bet the purpose is to keep debris and liquids out of the spark plug tubes since its so hard to get out once its in there, and if you remove the plugs when theres stuff in there itl fall into the cylinder.
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Old 05-28-2008, 05:38 AM   #19
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Quote:
Originally Posted by mc_p0pe View Post
Hey there,
I have this same problem and to make sure it is right the first time could you also tell me how to replace the valve cover gaskets too, how many and where at exactly?
There are two (2) valve covers and one (1) 'spark plug cover'. However, the Toyota manual, and probably your Toyota parts guy will list them as the No.1 and No. 2 Cylinder Head Cover Gaskets for what we Americans usually refer to as valve cover gaskets. The 'spark plug' cover/gasket is refered by Toyota on our car as the No. 3 Cylinder Head Cover.

So...the No. 1 and 2 are traditional valve cover GASKETS, to be used between the two valve covers (No. 1 and 2 cylinder head covers) and the head to seal, while the No. 3 Cylinder Head Cover is one complete replacement part/gasket/cover but not actually a valve cover...goes on top of the head, over the spark plugs, between the two valve covers.

If you are going to work on your own car and don't recognize a traditional valve cover you MUST get the Toyota Supra Repair Manual (TSRM). Even for those who do know cars will most likely have and use it frequently. (I recall from somewhere in this forum the TSRM is available on-line. If you can find it go to page EM-33 for the 1988 Turbo for a nice picture.)

Scan backwards on this thread for lots of info on this topic.
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Old 03-13-2012, 04:32 PM   #20
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To elaborate on post #7:

There is a third place it can come from... That's the PCV plumbing. If you've got severe blow-by issues the quantity of oil passing through the crankcase ventilation system can be quite high and quickly degrade the couplings giving the oil another escape route than the intake tract. It's not common and usually takes quite some time but it does happen often enough that you shouldn't disregard the possibility. I've seen this twice. It's a rather nice surprise as it's the easiest thing to take care of, but I usually replace the valve cover seals anyway (as I've probably already bought them :P ).

Don't forget the FIPG at the right angle of the #1 cam caps.
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Last edited by cre; 03-13-2012 at 05:07 PM.
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