19867 Toyota supra oil leak.

MKIII Supra engine oil leaks. There are many possibilities. A regular one that crops up is the cam position sensor or distributor O-ring that gets hard and leaks. Look for oil all around and under it, but don't confuse it with a valve cover leak. I now have an internal oil leak in cam position sensor because it leaks from inside the cam position black cover. I made a temporary fix using an aluminum foil "cup" under the housing to catch the oil. There is a kit to overhaul and replace the shaft seal. It also includes a bearing, a expansion pin for the drive gear and the external O-ring for $25. Kit number 12313002 at www.kbox.ca I have found the best valve cover solution is to clean the surfaces dry with a towel and use a thin smear of oil resistant silicone on both sides of the rubber gasket. Use a twisted Q-tip to get the oil out of the screw holes an finish with some solvent dipped ones and finally a dry one. Get some stainless steel hex or allen screws to replace the stock ones of the same length. I used spare 1984 chysler laser turbo injector O-ring seals under the dome shaped metal washers as insulators. The rubber can take the heat. Put a drop of red locktite on the threads and screw down evenly all around. That red locktite makes it hard to move the screw after it has set up. I would be hesitant to use it with stock phillips screws. Another place is the cam shaft seals. They are not as hard to replace as it may first appear. Look for oil on the front under them and also by the cam position sensor. Check the Turbo oil lines and remember to use the copper washers on the pressure side banjo bolt. Check around the dipstick where it enters the block. I used some silicone to reinforce the hard O-ring. Rubber power steering lines or the pump itself can leak. Look for red oil. Ckeck the hose clamps but don't over tighten. Oil inside the air intake could mean excessive blow by from worn or carboned up piston rings. Do a compression test. Also a worn turbo can put oil in the induction system. Look for oil in the hose that connect to the intercooler low in front. Be careful with the Air Flow Sensor on a turbo car. Never use any solvent on the stalk that is in the air flow or it will be ruined. Blow by oil or a leaking turbo can ruin one too. A rare possibility could be the head gasket. Retorque the head bolts to 172 ft/lbs starting from the center and working out in a crisscross pattern (takes an allen socket tool) It might be well to clean up the engine bay and do the easy things first. Then you could see where the fresh oil is coming from. A mechanics mirror on a collapsible rod and a flashlight are useful in tight places.