50/50 mix of acetone and transmission fluid if what i've used for a while now to get glow plugs out, but if your not an experienced with chemicals or you forget things then use PB blaster. if you do try this mixture then only use enough don't sit there spraying it all over the place and when it breaks free use brake cleaner and wash it all OFF.
and this works really good on the uppipe to manifold bolts
2006 Chevy LBZ
3 inch MBRP downpipe with 4 inch exhaust.
Edge insite CS 85100, transgo jr shift kit, FASS 150, edge EGT sensor, Egr blocked off with blocker plate that can be removed when testing time comes
just bought truck 11/14 upgrades are coming as the cash gets in the bank account!
Working in a Gm dealership as diesel specialist , and no i don't half *** anything to make flat rate. its always done right and clean.