Classic Mustangs (Tech)Technical discussions about the Mustangs of yester-year.
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I was hoping that it was the oil pan gasket leaking at the back but after replacing the pan gasket the leak is still there. So it is the rear main seal leaking - no surprise since it is as old as the car.
Plan A: Pull 289 motor and replace rear main seal, put 289 motor back in car.
Plan B: Pull 289 motor and replace with a built up 302 spare motor that I picked up. What I want in the long run is a reliable driver with a little lope in the cam. Nothing wild or stroked since I will be spending money on the other Mustang this fall.
Anyone else been in this position? Insights ???
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I just did this Yesterday. Pull the cross member and disconnect the pitman arm and the pan will come out. Remove the #5 main CLEAN EVERYTHING and put the new seal in place. I used the FEL PRO silicone seal. Torque to 70 foot pounds in 3 stages. The hardest part was getting the oil pan back on , its a little hard to glue the pan gasket in place then place the pan up an bolt it down ( darn gravity) . Make sure you have a helper to hold the pan.
This really only took about 3 hours in my garage and I only needed air to remove the cross member.
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