Could this be a problem (gasket gap) - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 04-04-2006, 08:46 PM   #1
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Default Could this be a problem (gasket gap)

I found this when I removed my supercharger. The Fel-pro gasket leaves a gap at two points on the wastegate leaving a path to cavities on the underside of the SC. It was this way when I took it off, and my new gasket has the same issue.



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Old 04-04-2006, 09:41 PM   #2
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No problems. Dead sealed area, and only when bypassed.

EDIT

Your coolant leaks look nasty.
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Old 04-04-2006, 11:53 PM   #3
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Interesting.

Talking to John on the phone, and looking more closely, then going out and test fitting two OEM gaskets on my old Gen2 supercharger, I have a MUCH better fit.

John is going to test fit his old gasket on his recently replaced Gen3 and his OEM Gen2 soon to help troubleshoot this.
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Old 04-05-2006, 02:08 AM   #4
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That is why instead of FelPro, I used ROL/Victor Gasket P/N MS4509. I compared the ROL to the OEM and they are identical.
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Old 04-05-2006, 08:58 AM   #5
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Joe, he had this same problem with OEM and Fel-Pro on two consecutive gaskets.
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Old 04-05-2006, 10:52 PM   #6
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Will...look at the intake... ...remember our discussion of velocity and distribution?? Remember the results??? Look at the different color between the two open areas.
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Old 04-05-2006, 10:55 PM   #7
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Yup. Noticed that. Pretty severe reversion. The colors are obvious. And it'* turned the debris into tar.

John, did you smell fuel when you opened it up? Does it look any different near the entrance to the runners?

How long have you had that SC on since the last change? About a year, right?
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Old 04-05-2006, 10:57 PM   #8
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Will...Remember when I did the rebuttal when it was said on an earlier posting that the flow was equal on all runners and I said it was not?
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Old 04-05-2006, 11:00 PM   #9
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The runners were the same color as everything else... really dark brown. The dark stuff on top of the LIM felt like thin gritty oil, and wiped right off for the most part. Couldn't tell you about fuel smell, I had a bucket full of it next to me at the time.
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Old 04-05-2006, 11:00 PM   #10
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Yuppers. Remember it well. It'* not even remotely possible for them all to be equal. Particularly the 5 and 6.

A little history on the unit we're looking at.....it was purchased from FLOZ in disguise. Unbeknownst to John. It'* part of a Gen3 conversion. John has been battling tuning issues for the last year with it.
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