no compression on driver side - 460 Ford Forum
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post #1 of 6 (permalink) Old 07-26-2013, 03:13 PM Thread Starter
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no compression on driver side

i have a rebuilt 466, i havent started it yet just turning over the the starter and checking compression, do i have to run it to get the rings to seat 1,2,and 3 all had 120 psi number 4 wasnt gettng pressure but then it caught and hit 120 just fine but i cant get the compression up
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post #2 of 6 (permalink) Old 07-26-2013, 03:19 PM
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If its brand new rebuilt never run. Yes you have to break it in and seat rings and such. Sometimes they smoke and whatnot til they get broken in.

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post #3 of 6 (permalink) Old 07-26-2013, 05:35 PM
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You probably shouldn't be cranking it over if it's never run without the intent to start it. Wiping all the assembly lube off the cam/bearings/lifters etc. is not a real good idea (unless it's a roller, than not a biggie, but still the assembly lube on the main and rod bearings should be considered)....Prime your oil pump, and, if it was mine, I wouldn't do any more cranking until I was ready to start it.

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post #4 of 6 (permalink) Old 07-26-2013, 09:41 PM
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Quote:
Originally Posted by 1972Mach1 View Post
You probably shouldn't be cranking it over if it's never run without the intent to start it. Wiping all the assembly lube off the cam/bearings/lifters etc. is not a real good idea (unless it's a roller, than not a biggie, but still the assembly lube on the main and rod bearings should be considered)....Prime your oil pump, and, if it was mine, I wouldn't do any more cranking until I was ready to start it.

Lucas
X2! Fire that thing up after priming it and break it in! Use good break in oil additive as well. Its your only chance you get one shot at it.

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post #5 of 6 (permalink) Old 07-27-2013, 02:49 PM
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compression

does it have hyd. lifters? if so that will factor in your compression problem too, crank it up and break in the cam and lifters and then see what you have after that, good luck
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post #6 of 6 (permalink) Old 07-31-2013, 05:50 PM Thread Starter
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ok guys so all is well, i almost forgot i posted this, but it seemed that the pos harbor freight compression tester releif valve was sticking. but for everyones concerns i was starting it a day later, so i wanted to make sure i had no leaks or anything of that sort. so i fired her up on my makeshift running stand, she is idleing fantastic, turn key starting and now im going through and going to be setting the timing. but she is purring like a kitten. thank you to all who has responded. sorry it was a false alarm
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