Squealing After Head Gasket Replacement (Page 2/2) 82-T/A [At Work] JUL 29, 09:14 AM quote Originally posted by Fiero515: Sorry for broken image links, will redo them shortly. I'm able to open them if I do "right-click, open in new window." Easiest thing is to use the UPLOAD media button at the bottom. But either way, did you replace the belt with a new one? The old belt would have spread coolant all over the pulleys, and coolant includes some kind of oil for lubrication of the parts as much as it does for cooling. Follow what I said in my post above (brake cleaner, new belt, tighten it, etc.) Fiero515 JUL 29, 11:24 AM Removing the main serpentine belt removed the noise. We’ll replace the belt, douse the pulleys in brake cleaner and go tighter. How much play should a fully tightened belt have? It’s not clear from the Hayne’s. 82-T/A [At Work] JUL 29, 11:42 AM quote Originally posted by Fiero515: Removing the main serpentine belt removed the noise. We’ll replace the belt, douse the pulleys in brake cleaner and go tighter. How much play should a fully tightened belt have? It’s not clear from the Hayne’s. There's probably a technical specification for this... but to be completely honest with you... generally you make it as tight as you need to until it stops squealing. But with a new belt and clean pulleys... it shouldn't need to be crazy. You don't want to get so aggressive that you damage the bearings of all the accessories... but I will say this... there is a crow-bar pivot hole just above the alternator for good reason. 1985 Fiero GT JUL 29, 01:19 PM I think the tightness should be 1/4-1/2" deflection either direction in the center of the belt between the alternator and water pump, just going off my (notoriously bad) memory, that would be something the ogre probably has a spec to. Fiero515 JUL 29, 01:51 PM We leaned into the alternator with a crowbar after spraying the pulleys down with brake cleaner. Engine is running and belt spinning with no squealing. Thank you everyone for the tips on this!