My Pete rebuild
01-02-2020, (Subject: My Pete rebuild ) 
Post: #469
RE: My Pete rebuild
Has anyone ever checked or recorded piston protrusion? It's not listed anywhere on quickserve.
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01-02-2020, (Subject: My Pete rebuild ) 
Post: #470
RE: My Pete rebuild
Shouldn't need to right? As long as your rods and pistons measure the same length as OEM, you should be good. What makes you think about this?
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01-02-2020, (Subject: My Pete rebuild ) 
Post: #471
RE: My Pete rebuild
Because I've been overthinking EVERYTHING and the next step is to slap the head on this thing lol. That and Rawze has mentioned compression ratios more than once, I was more curious than anything.

Also curious on these anti-polish rings - I'd think they'd just be asking to fret the head.

I just know that the next time the tops of these pistons are visible, there's a very good chance that I'm going to be filling the liners with tannerite.
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01-02-2020, (Subject: My Pete rebuild ) 
Post: #472
RE: My Pete rebuild
I've thought the same thing about those rings.
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01-03-2020, (Subject: My Pete rebuild ) 
Post: #473
RE: My Pete rebuild
I have not seen it yet. Only fretting I see is when there are also liner issues.


User's Signature: ->: What I post is just my own thoughts and Opinions! --- I AM Full Of S__T!.
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01-03-2020, (Subject: My Pete rebuild ) 
Post: #474
RE: My Pete rebuild
280k on overhaul with a head that was reused when previous owners overhauled it there wasn't a single scratch on it from those rings


User's Signature: 2010 Lonestar - CM871 - 13sp - 3.70s, 2016 T680 - cm2350 - 13sp - 3.36s - skateboarder
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01-03-2020, (Subject: My Pete rebuild ) 
Post: #475
RE: My Pete rebuild
Huh, who'da thunk it since they're essentially free to dance around. Measuring my old gasket crush at approx .080", the rings have approx a .063" protrusion from the liner flange, leaving .017" of free space.
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01-04-2020, (Subject: My Pete rebuild ) 
Post: #476
RE: My Pete rebuild
(01-03-2020 )Nostalgic Wrote:  Huh, who'da thunk it since they're essentially free to dance around. Measuring my old gasket crush at approx .080", the rings have approx a .063" protrusion from the liner flange, leaving .017" of free space.

makes me wonder if aftermarket gasket is thicker?. that could explain a lot of compression differences. - old isx used to have thicker gasket and 'fire rings' installed the gasket to keep the combustion gasses in.


User's Signature: ->: What I post is just my own thoughts and Opinions! --- I AM Full Of S__T!.
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01-04-2020, (Subject: My Pete rebuild ) 
Post: #477
RE: My Pete rebuild
I guess it's possible, but if the IPD gasket was thicker, it would have reduced compression to some degree. I didn't mic the Cummins HG, not that it would matter without a before/after measurement, and I really don't want to open this thing up again...ever lol.

I did 150', then did two sets of 300' before calling it a night.



One nice thing about the OE Cummins kit (and head), is the USA markings on everything. I don't think it was always like that, but I don't think there was anything in the crate that didn't list US as the origin.
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 Thanks given by: redbeard , Rawze , Brock




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