Originally Posted by Desarial
i have a 1989 4.0L Renix. I just found that there is water in my oil. it was milky on the dipstick and where it blew back on the air filter, but not under my valve cover. any ideas? I'm worried it might be the head gasket. just curious if there are any other causes.
Sounds like a head gasket to me. I had a blown gasket on mine, but it was between cylinders and didn't leak to the water jacket. A bad rms won't let rain water in. You might do a compression test, if it's letting water in at least one cylinder might show low. Hey, if you end up replacing the head gasket, it'd be a good time to replace the lifters. I didn't think of it when i did mine, but i wish i had. My old '93 is ZERO leaks anywhere, but still sounds like a sewing machine on steroids.