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1/2 cordless drill chuck the valve up in the drill and a belt sander works fine.
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10552ST and 10555ST pressure problems
The 383 I dynoed with high oil pressure using the 10552 ST oil pump was exactly what I thought was the problem. The bypass valve was to long and not exposing the complete bypass hole. I also have another engine with the same pump same problem.
I don't understand why I have to there home work for them. They told me not to take the pump ap
art it would void the warranty. I said really.
I have used probably 35 of the10552 pumps with zero problems. Now they said the 10552 ST they did change the cover HMMMMM
Here is a link to the dyno run
https://www.facebook.com/cncblocks.northeast/posts/pfbid0CWMCC5tUE7H6txU83MSpjAoU8FzbTU3S2kHjCUGtFtAoZSEQEPaEeG165yXwCig7l
PS
Good customer Jerry Brighthaupt saw my post on FB and took his 10555 ST pump apart and called me and found less the half the bypass hole was exposed. He was just getting ready to put the pump and pan on one his circle track engine. He was going to shorten the valve 3/16 of and inch which will cure his problem.
A big shop near him stopped using those pumps because of high oil pressure.
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I don't understand why I have to there home work for them. They told me not to take the pump ap
art it would void the warranty. I said really.
I have used probably 35 of the10552 pumps with zero problems. Now they said the 10552 ST they did change the cover HMMMMM
Here is a link to the dyno run
https://www.facebook.com/cncblocks.northeast/posts/pfbid0CWMCC5tUE7H6txU83MSpjAoU8FzbTU3S2kHjCUGtFtAoZSEQEPaEeG165yXwCig7l
PS
Good customer Jerry Brighthaupt saw my post on FB and took his 10555 ST pump apart and called me and found less the half the bypass hole was exposed. He was just getting ready to put the pump and pan on one his circle track engine. He was going to shorten the valve 3/16 of and inch which will cure his problem.
A big shop near him stopped using those pumps because of high oil pressure.
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A lot of people been contacting Mellings with zero results. A lot of dist. and cam gear issues from running over a 100 LBS of oil pressure.
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949 Posts
Any update from Melling?
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Nope I just fixed another pump where the customer took his pan off and brought me the pump and it was messed up
Nope just fixed another pump where the customer had t much oil pressure
Carl Hinkson
Had a friend bring his oil pump to me a Mellings 10552 ST complaint was high oil pressure. Yup had to shorten the bypass valve.165 to clear the bypass hole. Mellings has never returned any of my...
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41 - 45 of 45 Posts
