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-   -   Oil on spark plugs (http://www.toyota-supra.info/forums/mkiii-supra/17262-oil-on-spark-plugs.html)

Rahnter 06-27-2010 12:41 AM

Oil on spark plugs
 
My car has been misfiring at random times during the last week or so. Decided to take a look today, and found a small pool of oil around spark plugs 1/2 & 5/6, pugs 3/4 were unaffected . I cleaned the area as best I could and pulled the plugs, and the were covered with motor oil (may leaked down since it was hard to clean it all). I didn't see any leaks from the valve covers (had the gaskets replaced about 2-3 years ago). I'm going to take another look tomorrow, but what do you guys think? Any help is appreciated

mirage83 06-27-2010 01:04 AM

That's your #3 gasket leaking in the plug galley. Easy to replace with the OEM gasket, or you can use generic washers/gaskets of a size I can't recall right this moment :o . Just pull the bolts which hold that gasket on and replace, should resolve the problem of oil getting into the plug galley and shorting your plug wires.

mirage83 06-27-2010 02:23 AM

BTW, the four bolts you have to pull are 14mm allen head bolts. The gaskets I mentioned earlier (if you don't want to go with a new #3 cylinder head gasket) are oil drain plug gaskets. Take one of the bolts with you to a auto parts place and find a suitable size.

907mge 06-27-2010 02:40 AM

You don't need to replace the 4 plugs. On mine I did away with the spark plug valley cover and just reinstalled the plugs with RTV and it has worked very well for me. I also cleaned up the treads well. I left the cover out so I could keep track of what is in the valleys since the coolant plugs can leak also.

mirage83 06-27-2010 04:13 AM

Yeah, didn't realize that I had left a couple of words out as the bolts definately don't have to be replaced. Was thinking faster than I was typing. :eek3:

batmmannn 06-27-2010 09:37 AM

Those plugs
 
Be careful putting them back in I also used RTV and it worked great I have no oil leaks. Don't strip them going back in and not too tight. By the way guys my red Supra is still going strong!


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