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Pulled motor due to white smoke/oil in exhaust and no compression on #3. Pics...

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Old 03-19-2017, 09:19 PM   #1
BlackMagicC5
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Default Pulled motor due to white smoke/oil in exhaust and no compression on #3. Pics...







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Old 03-19-2017, 10:20 PM   #2
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So what exactly happened - besides the rocker breaking?

Doesn't look like anything is hurt too bad.
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Old 03-19-2017, 10:38 PM   #3
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My tuner said valve seal came loose and retainer starting beating the seal which broke the rocker. I have very limited knowlwdge about engine internals. Any idea why this would happen and how to prevent it from happening again? The motor only has 24k miles but we already ordered forged internals expecting it to be worse so we are going to go ahead and rebuild while its out. Was only at 650rwhp when this happened and under 500 miles of it being boosted.
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Old 03-20-2017, 07:18 AM   #4
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Hard to say, probably a bad seal - looking at the springs, it looks like someone already replaced the springs/seals/seats so a bad or incorrectly seated seal would be my guess.
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Old 03-20-2017, 10:26 AM   #5
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Looks like you may be able to simply put a new seal and rocker on and keep trucking!
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Old 03-20-2017, 03:26 PM   #6
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The car came with a small ECS blower cam installed by ECS.
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Old 03-20-2017, 05:02 PM   #7
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Quote:
Originally Posted by SmoothFRC View Post
Looks like you may be able to simply put a new seal and rocker on and keep trucking!
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Old 03-20-2017, 06:12 PM   #8
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No it needs a rebuild with forged internals 😉
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Old 03-21-2017, 05:36 AM   #9
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No it needs a rebuild with forged internals 😉
And a bigger blower.
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Old 03-21-2017, 08:08 AM   #10
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Ditch those rockers and go with stockers with bronze bushings.
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Old 03-21-2017, 08:25 AM   #11
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There were some batches of Ultralights that were prone to breaking.

But given there is other damage, it would seem that something else failed and that caused the rocker to break

If the rocker had just broken on its own, there wouldnt have been the other damage.
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Old 03-22-2017, 07:48 PM   #12
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And a bigger blower.
I have turbos
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Old 03-30-2017, 10:40 AM   #13
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Those are the older run of YT rockers. See post #24 picture 1

https://www.corvetteforum.com/forums...post1582040512
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