The Ford Barn

[email protected] · 05-09-2026, 10:53 AM

Excessive oil leaks that appear to be front of engine ( not from cotter key hole) any easy fix, I plan to increase viscosity ( 20/50) and I put on a new breather, should I put on a PCV ?open to suggestions,37 cabriolet is 98 % original open to suggestions

ford38v8 · 05-09-2026, 10:45 PM

Cover your distributor with saran wrap and give your engine a bath, then get back to us with exact location and amount of leakage. 20/50 sounds good in any case.

Ggmac · 05-10-2026, 01:07 PM

I would not recommend pcv . The 37 uses no rear seal so youd be sucking dust from the clutch area using a pvc

Ggmac · 05-10-2026, 01:08 PM

You need to do as suggested. Clean the motor and be more specific, picture will help

mcgarrett · 05-10-2026, 01:12 PM

Maybe start by tightening the bolts on the oil pan, timing gear cover, distributor, etc. and see if that makes any difference.

mfirth · 05-10-2026, 05:44 PM

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What mcgarrett said x 2, but do not over tighten the pan bolts.

1956 ford · 05-11-2026, 01:55 PM

A 20/50 is no more then a 20 thought all operating temp go to a 30

05-09-2026, 10:53 AM	#1
[email protected] Junior Member Join Date: Mar 2026 Location: Chandler Arizona Posts: 1	37 Flathead oil leaks Excessive oil leaks that appear to be front of engine ( not from cotter key hole) any easy fix, I plan to increase viscosity ( 20/50) and I put on a new breather, should I put on a PCV ?open to suggestions,37 cabriolet is 98 % original open to suggestions

05-09-2026, 10:45 PM	#2
ford38v8 Senior Member Join Date: Jul 2011 Location: SF Bay Area Posts: 7,634	Re: 37 Flathead oil leaks Cover your distributor with saran wrap and give your engine a bath, then get back to us with exact location and amount of leakage. 20/50 sounds good in any case. __________________ Alan

05-10-2026, 01:07 PM	#3
Ggmac Senior Member Join Date: Jul 2016 Location: Lake worth Florida Posts: 1,466	Re: 37 Flathead oil leaks I would not recommend pcv . The 37 uses no rear seal so youd be sucking dust from the clutch area using a pvc

05-10-2026, 01:08 PM	#4
Ggmac Senior Member Join Date: Jul 2016 Location: Lake worth Florida Posts: 1,466	Re: 37 Flathead oil leaks You need to do as suggested. Clean the motor and be more specific, picture will help

05-10-2026, 01:12 PM	#5
mcgarrett Senior Member Join Date: Dec 2013 Location: Corsicana, Texas Posts: 1,551	Re: 37 Flathead oil leaks Maybe start by tightening the bolts on the oil pan, timing gear cover, distributor, etc. and see if that makes any difference.

05-10-2026, 05:44 PM	#6
mfirth Senior Member Join Date: Aug 2017 Location: ohio Posts: 1,165	Re: 37 Flathead oil leaks Sponsored Links (Register now to hide all advertisements) What mcgarrett said x 2, but do not over tighten the pan bolts.

05-11-2026, 01:55 PM	#7
1956 ford Member Join Date: Dec 2023 Posts: 60	Re: 37 Flathead oil leaks A 20/50 is no more then a 20 thought all operating temp go to a 30