Have a1996 Toyota RAV4. With coolant in the oil. Compression test shows 180-190 in all four cylinders I have drained the oil, isolated the oil cooler and pressurized the cooling system and have coolant dripping from the oil drain. Any ideas where this leak is? The engine runs smooth with no codes.

SOURCE: My 1994 toyota 4x4 pickup coolant is draining

Your timing cover is worn through. Your timing chain has worn down the guides and is now eating a hole in the timing cover. You will need to replace the timing set. If you are doing your own work, you will NOT have to remove or loosen the head. You will need to remove the oilpan. It's not so much for the clearance as it is cleaning out the trash in your pan. The guides are now in your oilpan, and if you don't take it off now, you will shortly after the oil pick-up screen is blocked with junk. I'm not sure about the 2 wheel drives, but on the 4's you can take the motor mounts loose and jack the engine up enough to get a piece of 2X4 between the mount faces. You can then wiggle the pan out. Since you are replacing the timing chain and have to remove the radiator, do it first. Otherwise you will jack the fan through the fan shroud. Have fun.

gavin jones

• 1508 Answers
• Posted on May 27, 2011

SOURCE: Is a compression test a

Check for milky oil
It may help to have the radiator cleaned and flushed, and a new thermostat installed, the coolant may be going out the overflow
Not certain how it ruins radiator caps, they hold about 5psi in the radiatior and let excess pressure into the overflow, then when the engine cools, allow coolant to s uck back form the overflow tank