Well my supercharger gasket went bad. set for a couple days start it up idols about 3 grand. huge vacuum leak gasket is leaking anything I should do while I have it apart l67 btw oh and I'm kind of curious why all the sudden it blew up?

Could be just a bad gasket. Reasearch Hylomar. It's expensive but it's good up to 700 F. You can use the stuff on head gaskets if you want. I mostly only use it on leaky plastic valve cover gaskets.

I don't see any way a failed supercharger gasket can cause a 3k idle, I think something else is wrong.

------------------
86 Fiero GT 4spd - L67 swap: VS cam, GenV
98 GTP - Some mods

Unless the gasket was torn or damaged the problem is more likely a warped housing or corroded intake where the gasket sits causing the leak. With the SC off and the surfaces scraped and cleaned check with a good straight edge to make sure all surfaces are flat and smooth like they should be.

------------------


DARN Cars now open with
Over 30 years wiring experience between cars and trade as an avionics technician in both Canadian Air Force and civilian aviation.
Over 25 years experience building and modifying cars.
Over 10 years of full Fiero engine swaps and harnesses building and still going.

okay I'll do that thanks for all the replies

Are you using the GM aluminum supercharger gasket? They usually seal fine. Did the installer torque down the supercharger in slow gradual steps while rotating by hand to insure no bind? Are you sure the leak is from the supercharger not the LIM manifold gasket?

------------------
" THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Powerlog manifold, Northstar TB, LS1 MAF, 3" Flotech Afterburner Exhaust, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, HP Tuners VCM Suite.
"THE COLUSSUS"
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "

Sound's like you could have a Idle Air Control Problem..

Is it common practice to use a sealer on an Eaton (M62 or M90) supercharger base gasket?

Also, is there a mounting bolts torque sequence pattern available for these superchargers?

Thank you for the help on this.