Yes, Deterrents, not Detergents, and the winner is Zeibart!
Some months ago I had belatedly realized that the GT I bought on eBay had been Zeibarted in its Youth (seeing some of the 'plugs' in the door jam) but I never paused to reflect on what that might mean, until Yesterday. I was replacing my Oil Pressure Sensor that had unhappily sprung a leak under the electrical plug, spraying oil all over the engine and firewall during the two days I had ignored a'faint smell of burning oil.' This also seemed like a good time to tackle the nasty job of generally cleaning off the 27-year accumulation of grease and dirt on the engine, trans, cradle, and what-not. The folks at O'Reilly's had recommended a 'Green' foaming cleaner with much enthusiasm and in using it I quickly noticed that it only superficially removed some of the muck, which then dried leaving a very sticky mess. Then the light went on: 'undercoating! Ziebart!!' Why the Zeibart technician felt the need to coat the Oil Pan, A/C compressor, much of the engine block, etc., etc., became an open question to me. Had my car been coated on a Friday afternoon? A Monday morning perhaps? Tossing Environmental Friendliness aside I returned to the store and purchased a goodly amount of brake cleaner, original-flavor Gunk, and Mineral Spirits (from Home Depot.) With these I was then able to completely dissolve the Ziebart and make real progress toward cleaning up the engine. Let Ziebart victims take note.
And now for a quick question during a break from cleaning: do I have to remove the oil filter to get the starter out? It's a real mess with oil and undercoating
And a follow-up: is anyone using a 45 degree angle adaptor for the oil filter so it is straight up and down? If so, where can I get one? Or is there some trick to removing the angled oil filter so it doesn't leak all over the engine block and cradle?