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ST 4500 Issues

Old 12-13-2009, 11:04 AM
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WhiteRook
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Default ST 4500 Issues

Bax , i have Read from a post on RCSB That there is a problem with a pin in the upper piston area that comes lose and scores the piston , also the oil hole in the big end may not be positioned right . any truth to these?
Old 12-14-2009, 10:18 AM
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Bax
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Default RE: ST 4500 Issues

We have no idea what you are asking about. There have been rare failures of the piston pin retainers, but that doesn't cause the wrist pin to grind against the cylinder liner. When a retainer fails, it is the part that causes damage. But again, it's a very rare happening.

We've never heard of connecting rod problems.
Old 12-14-2009, 10:44 AM
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WhiteRook
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Default RE: ST 4500 Issues

its most likely from someone who didnt break their engine in right
Old 12-05-2016, 11:12 PM
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Red Baron Mike
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I have recently heard from two internet comments about the wristpin circlip breaking on the large Super Tigres and scoring the cylinder liner. Any comments about this in addition to what has already been said?
Old 12-06-2016, 08:13 AM
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It has happened, but it's not at all a common problem.

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