1990 351 Rear Main Seal Leak

[pookiemonster]

Hi all!!

I have a 1990 Eddie Bauer Edition 351 M that i need help on. I noticed oil leaking out of the rear main seal, and was wondering wether i have to pull the engine out. I also have leaks all over the valves, and am not sure if that is the problem. A few weeks ago, my engine ran hot, and I noticed that my coolant wasn't going through, so after checking everything else, I realized it must be my heater hose and unplugged it until I was able to fix it. That works now, but am wondering if that could have something to do with my new problem. Please help. Thank you in advance.

 

[sweepersrgr8]

First, If it's a '90 it's a 351W not M . No you dont have to pull the engine to replace the rear main seal, but you will need to drop the tranny. The seal is a one piece unit, and requires a special driver to install. AUTOZONE, or ADVANCE will let you borrow one for a small deposit.

You engine shouldn't run hot because of a clogged heater hose, your water pump has a bypass hose, and many of the Broncs have a vacuume operated valve that actually blocks water passage through the heater core. I would check the thermostat if your water is not circulating through the radiator.