madkaw Posted May 30, 2009 Share Posted May 30, 2009 Another issue I have been dealing with on my 280zxt is oil on the sparkplugs-mostly seen as wet oil on the threads. It is not running down off the valve cover and the engine has been thoroughly cleaned. The cylinders are all reading about 135. I haven't had the car very long, but I have not noticed any major oil consumption or smoke. I have checked the pcv and the hose is dry between the valve and the crank case. After searching(I haven't found too many threads about oily spark plugs), I suspect noe the turbo oil seal is not holding. i am going to remove the return line to check for obstruction of the return oil-maybe building excessive pressure? Any ideas? Quote Link to comment Share on other sites More sharing options...
BlueTurboZ Posted May 31, 2009 Share Posted May 31, 2009 Pull the J Pipe & see if there is any oil residue inside. Then, pull the intake boot fron the turbo & feel for how much shaft play the turbo has. That should give you a good idea of the condition of the seals. Quote Link to comment Share on other sites More sharing options...
RUZN Posted June 4, 2009 Share Posted June 4, 2009 hmm but oil on threads not on inside of the plugs.. you might be surprised.. somtimes oil will weap out valve cover un noticed as when its hot its really thin then it wont show a mark.. otherwise I would presume pistons seals but if comp is good and electrodes arent black to then thats a odd one. Quote Link to comment Share on other sites More sharing options...
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