806camaro

Was driving my camaro, 1990 IROCZ 305, TPI, all stock. Looked at my temp gauge was at 260* degrees. Shut car, towed it home. Found a busted hose. Fixed, filled with coolant, now car has what sounds like an exhaust leak, a knock, and temp stays at little above 230* no higher, no lower. And the power of the car doesn't feel the same.... Any thoughts? And no water in the oil.

8t2 z-chev

a head may have gotten too hot and warped-do a compression test and if any cylinders next to each other show weak compression,you have warped head/blown head gasket.If head warped,an engine shop can skim it true(check for cracks first) or head can be replaced with a good one-check that it is flat before install

806camaro

What would the normal compression be on a stock 305 TPI? And also would a warped head/blown head gasket make a exhaust leak sound?

sofakingdom

iTrader: (1)

260° is not particularly "hot"; especially not, given that the boiling point of COOLANT (not WATER) under 15psi of pressure (not ATMOSPHERIC) is around 270°. I seriously doubt you hurt anything.

180 psi or so. More important, that all cyls be about the same; no more than 15 psi or so from least to most.

But you're not looking for a "number". You're looking for consistency, or for one cyl to be WAY lower or higher than the others, or 2 adjacent cylinders to be low.

Maybe; probably not.

Before getting all wound up about head gaskets though, I'd suggest replacing the spark plugs, and maybe unplugging the injectors one at a time to see if any of them make markedly less difference to how the engine runs than the others.

I'd suggest also while you're at it, instead of getting all wound up over head gaskets, find and fix the actual root cause of the cooling system not working right. Which would include,making sure the gauge is accurate, and that you're not just chasing your tail pointlessly.

People always seem to fear the worst and jump to the most dire possible conclusion about things like this. I'm reminded of people who pull their car into a shop and tell the mechanic, "replace the {fill in the blank expensive part}", and then when they get the car back with the brand-new {fill in the blank expensive part}, the car STILL has whatever was ACTAULLY wrong with it in the first place; except now the owner's bank account is about {expensive part} lighter; and all the screaming at the mech and demanding that he find and fix whatever is wrong FOR FREE is pointless, because he did EXACTLY what YOU told him to do. Don't go there. Instead of behaving like one of THOSE people, try a CALM, LEVEL-HEADED, LOGICAL, ORDERLY, STEP-BY-STEP approach to simply repairing the car.