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H motor noise when cold

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ernz

10-15-2004 04:33:12

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being new to old tractors but not equipment, i have a question for the group, i have an H that has some light knocking when first started on a cold engine. after about 5 min. quiets down and don't hear it again unless restarted on cold engine. knock is around #1 and high in motor. at one time engine was opened and at least rings installed, my assumption. engine uses no oil at all, has good oil psi-30 at idle-hot, 50 at full load/throttle-hot. tractor pulls like a champ and runs like a top. i am thinking it might be a little piston rattle or maybe wrist pin. my question is this something not to uncommon, and has anyone else encountered this issue, and what was your experience.

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Allan in NE

10-15-2004 05:03:35

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Re: H motor noise when cold in reply to ernz, 10-15-2004 04:33:12

Ernz,

You used the word "knock", so I assume that the noise is more of a "cracking" or "rapping" sound vs a "tic"? Kinda like a diesel sound?

If it is a wristpin, it is it's very early stages of failure tho, 'cause this type noise will usually stay with the enging cold or hot.

If the noise completely disappears after the 5 minutes, this means that something is swelling with tempreature and I think you are on the right track suspecting piston slap or a cracked piston, especially if someone did indeed go in there, just throw in a set of rings and not pay any attention to the piston clearance.

If on the other hand, the noise is more of a "tic" type sound and seems very high up, it could be coming from the valve train. Perhaps a valve adjustment is in order?

Dunno, it's hard to hear it over the phone like this. :>)

Allan

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ernz

10-15-2004 08:21:07

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Re: H motor noise when cold in reply to Allan in NE, 10-15-2004 05:03:35

its not lifter noise, more of a solid light knock, sounds alot like my pickup on a cold morning, a little knocking then quiets up after running awhile.

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harley

10-15-2004 08:20:37

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Re: H motor noise when cold in reply to Allan in NE, 10-15-2004 05:03:35

Bet REALRON would have an answer. Good, bad, or indifferent, he'd have an answer.

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