On my '89 IROC with stock L98 motor the passenger side exhaust manifold bolts are rusted and tight. I have been using Liquid Wrench and it seems to help only a little. Any ideas? I really don't want to break a bolt off in the heads.

Thanks!!

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Phil87IROC
Blue '87 IROC, 383 Crate Motor, KB pistons, AFR 190 heads, ZZ-9 cam, Edelbrock RPM intake, Hooker SC/LT headers, Edelbrock 750 cfm Carb (#1411), stock T-5, GM 3.42 rear w/Auburn posi.
Ohio Valley Dragstrip Trophy Bracket WINNER - 8.39 ET on a 1.82 sec. - 60'. Best MPH = 84.44. Still Tuning Carb!
Red '89 IROC L98, 700R4, T-Tops, K&Ns w/open air boxes, 160 T-stat, Hyper Chip, gutted MAF, 53kv coil, MSD wires.

 

Tried PB Blaster?

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lg4
slp muffler
pro flow air cleaner
performer intake
cat delete
ratchet shifter
160* stat
q-jet from 1970 vette

 

Yes, try WD-40 or PB Blaster. PB blaster claims it'll eat through a styrofoam cup in a few minutes. That stuff is pretty strong and should work.

Jason