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Don 'Mo Lurch'
Don 'Mo Lurch', Classic Car Mechanic
Category: Classic Car
Satisfied Customers: 20854
Experience:  Heavy Line Mech-, Mobile Electronics. Sales, Installation & Repair for 30 years. R/S, etc.
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Have64 ford 390 engine leaking from wherei think is the

Customer Question

have64 ford 390 engine leaking from wherei think is the rearmain seal [7569 miles on rebuild] just read online thatit may be leaking behind oilfilter plate that bolts to block [ thunderbird club info]..they recomend an oversize gasket with silicone on both sides to cure problem please advise me as to your answer thanks jim
Submitted: 8 months ago.
Category: Classic Car
Expert:  Don 'Mo Lurch' replied 8 months ago.

You would need to Clean & have a good look to be sure it is not coming from the Rear Main Seal
The Oil Filter Plate is also a know issue.......
IF you replace the Oil Filter Plate Gasket, I would use RTV Form A Gasket, but you have to be sure the Block & Plate are very clean & let it dry for at least 24 hours in a 60 degree or above climate
Since the Plate is likely the Aluminum one, be sure the Mounting Surface is not pitted or cracked
IF it is, replace the Plate

let me know if you need further

Expert:  Don 'Mo Lurch' replied 8 months ago.

Did you have any other questions?
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Thank you.

Expert:  Don 'Mo Lurch' replied 8 months ago.

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