Evo 9 GSR & TTR Built 2.3L Oil Consumption

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Mar 26, 2018 | 04:41 PM

#166

LetsGetThisDone

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That seems like installer error on the oil rings.

Mar 26, 2018 | 07:06 PM

#167

Redlimit835

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This happened on the last two builds, and the only difference is this time it only happened to 3 of the 4 cylinders. Only difference I saw in the teardown measurements it that the good cylinder had less cylinder tapper, The other 3 had a strange taper that opened up towards the top of the bore, which is what lead me to think there was some strange wear from the rings.

Mar 26, 2018 | 07:44 PM

#168

LetsGetThisDone

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What are you revving this thing to?

Mar 26, 2018 | 07:48 PM

#169

Redlimit835

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Quote:

Originally Posted by letsgetthisdone

What are you revving this thing to?

Because of the oil consumption I barely ran it. The whole 5000 miles were at waste gate pressure with the limiter set to 8000. Nothing worth getting excited about.

Mar 26, 2018 | 08:29 PM

#170

RightSaid fred

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It must have been assembled carelessly.

Mar 27, 2018 | 12:15 PM

#171

Pal215

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Quote:

Originally Posted by Redlimit835

Because of the oil consumption I barely ran it. The whole 5000 miles were at waste gate pressure with the limiter set to 8000. Nothing worth getting excited about.

What measurements did you get for cylinder taper?

Mar 27, 2018 | 12:58 PM

#172

LetsGetThisDone

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Something is wrong with assembly. Either oil rail end gap, PTW clearance, or the oil rings were installed incorrectly. That damage doesn't just "happen".

Mar 27, 2018 | 07:55 PM

#173

Redlimit835

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From: Ohio

The only cylinder without ring land damage was less than 0.5 thou, the other 3 were 0.8-1.1 thou tapper. Again, hardly anything outrageous, but over the specs we would expect for an engine at work. Still not a worthy explanation for the consumption.

Mar 27, 2018 | 07:56 PM

#174

Redlimit835

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Quote:

Originally Posted by letsgetthisdone

Something is wrong with assembly. Either oil rail end gap, PTW clearance, or the oil rings were installed incorrectly. That damage doesn't just "happen".

What is your expected oil rail end gap? Do you have an actual number? Curious what you would expect to see.

Mar 28, 2018 | 12:56 PM

#175

LetsGetThisDone

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IIRC Wiseco calls for ">.010" end gap on the oil rings.

Mar 28, 2018 | 01:42 PM

#176

Redlimit835

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Ok, well according to Mike at Wiseco, they actually recommend >15 thou. And again not the problem with either of these builds.

Only thing we have come up with is the Asymmetric skirts combined with a notched bore not providing good enough alignment. So the talk is focused on maybe a 87 1400 HD with some adjustments and a custom ring pack so hopefully can get this thing squared away soon.

Apr 26, 2018 | 02:02 AM

#177

drmo

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Have you checked that the oil support rail that is used on these pistons was fitted the right way? If it wasn't it could make the exact same damage as it did.
http://blog.wiseco.com/oil-support-rails-how-they-work

May 7, 2018 | 05:18 AM

#178

xxthayxx

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From: cow tippin

Quote:

Originally Posted by High_PSI

Any updates?

Sorry its been awhile. It turns out the short block i bought from a member on here was junk, its noisy and consumes a lot of oil. He even tried to blame Kevin D's shop for the problem. Lesson learned.

May 11, 2018 | 10:31 AM

#179

Pal215

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Quote:

Originally Posted by xxthayxx

You should take it apart and rebuild it. Odds are the block itself is still good and you just need to reset PTW and ring gaps.... as long as the oil clearances were set properly.