Re-ringing Engine

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Mar 9, 2006 | 05:17 PM

Bode71

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Re-ringing Engine

I recently bought a 1980 F-250 with a rebuilt 400 in it, but when I started the engine it had a miss. I ran a compression check and one cylinder was at 0, I know I need to rering it, but should I also put in an oil pump? it only has 1000 miles on it, I'm sure they didnt break it in properly.

Thank you,

Bode71

Mar 9, 2006 | 05:24 PM

holland501

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From: houston

A reading of "0" would mean more than bad rings. I've only seen readings that low when there was a hole in the piston. The only other possible cause would be if neither one of the valves were opening or closing. Pull the valve covers off and check for rocker movement. Good luck.

Mar 9, 2006 | 09:15 PM

Torque1st

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Hello- Welcome to FTE! I have moved your post to the specialized forum we have here for your question. Check out the list of tech forums we have on FTE. There is a wealth of information and expertise here to help you. There are a number of links in my sig below to help you also. Have fun!

Mar 10, 2006 | 06:50 PM

old75F-100

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that would be either a valve problem or head gasket failure the best way to check would be to do a leak down test to pinpoint the problem but either way u have to pull the heads