The Ford Barn

tucker6077 · 09-03-2023, 09:39 AM

Hello Everyone ! The motor in my 33 was supposed to have been rebuilt 100 miles ago. My question is I have oil showing up on a few plugs that are firing?

Boggus Deal · 09-03-2023, 03:16 PM

Just 100 miles? I’m sure the rings haven’t even begin to get broken in well!

tubman · 09-03-2023, 03:50 PM

Depends on the type of rings, doesn't it? Old style cast iron rings take a while and chrome is even worse. Modern Moly rings are said to break in almost immediately. I would suggest you go back to the source and see what was installed.

Bored&Stroked · 09-03-2023, 07:14 PM

It depends on a lot of things . . . the machine work, the tolerances, the quality of the rings, has the engine been put under load to break them in, etc.. I won't speculate here, but my suggestion is to go run it hard - full accelerations for low speed, multiple times to see if that helps the rings seat. Also, without a leak down test, hard to really know if you have an issue and what it is.

Krylon32 · 09-03-2023, 07:25 PM

Bored&Stroked has it right. Ride it hard and put it up wet as they say.When done do another check. You got nothing to lose.

mfirth · 09-04-2023, 06:55 AM

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Also, if there are any hills or grades in your area, "lug" it up hill. Make it work hard in 3rd gear if posssible. Long ago an old engine builder had me do this with a rebuilt 6 cylinder and that engine used no or little oil and ran forever.

09-03-2023, 09:39 AM	#1
tucker6077 Member Join Date: Apr 2022 Location: Williamstown, NJ Posts: 47	Flathead V8 Hello Everyone ! The motor in my 33 was supposed to have been rebuilt 100 miles ago. My question is I have oil showing up on a few plugs that are firing?

09-03-2023, 03:16 PM	#2
Boggus Deal Junior Member Join Date: Jan 2015 Posts: 11	Re: Flathead V8 Just 100 miles? I’m sure the rings haven’t even begin to get broken in well!

09-03-2023, 03:50 PM	#3
tubman Senior Member Join Date: Dec 2013 Location: Minnesota, Florida Keys Posts: 10,320	Re: Flathead V8 Depends on the type of rings, doesn't it? Old style cast iron rings take a while and chrome is even worse. Modern Moly rings are said to break in almost immediately. I would suggest you go back to the source and see what was installed.

09-03-2023, 07:14 PM	#4
Bored&Stroked Senior Member Join Date: Jan 2011 Location: Central Ohio Posts: 5,070	Re: Flathead V8 It depends on a lot of things . . . the machine work, the tolerances, the quality of the rings, has the engine been put under load to break them in, etc.. I won't speculate here, but my suggestion is to go run it hard - full accelerations for low speed, multiple times to see if that helps the rings seat. Also, without a leak down test, hard to really know if you have an issue and what it is.

09-03-2023, 07:25 PM	#5
Krylon32 Senior Member Join Date: May 2010 Posts: 4,489	Re: Flathead V8 Bored&Stroked has it right. Ride it hard and put it up wet as they say.When done do another check. You got nothing to lose.

09-04-2023, 06:55 AM	#6
mfirth Senior Member Join Date: Aug 2017 Location: ohio Posts: 986	Re: Flathead V8 Sponsored Links (Register now to hide all advertisements) Also, if there are any hills or grades in your area, "lug" it up hill. Make it work hard in 3rd gear if posssible. Long ago an old engine builder had me do this with a rebuilt 6 cylinder and that engine used no or little oil and ran forever.