Blowing exhaust ????

[barriesheene]

Hi guys. If got what sounds like a blowing exhaust on my disco, ( '95 V8 ). I've changed the downpipe gasket and manifold gasket and it hasnt changed at all. There are no signs of cracks or leaks. Any idea's ? it's the drivers side bank. Thanks in advance, Baz

[ballcock]

Try having some one hold a rag into the outlet whilst your looking this should make it more obvious. I had a head gasket gone on mine which sounded like exhaut blow.

[teabag]

When my manifold to down pipe gasket leaked it sounded like a machine gun when underload, going up hills etc.

I couldn't see a leak but the garage could, and that was the drivers side, so 6 months later when they replaced the auto fluid and had to drop the Y pipe they also had replace the gaskets. Job done

[barriesheene]

Hi, guys. Sorry its been awhile I'm upto my eyes at the moment. UPDATE. Had new stainless exhaust fitted from y piece back. Gaskets changed ,( down pipe and manifold ). It is a machine gun sound which is what made me suspect gaskets but I cant seem to find the leak !. It is down on power tho and I pressure tested the bank of cylinders and the one closest to the bulkhead was reading 80/100 psi while the other three were all showing 150psi. Can the head gasket go from cylinder - out if there are no other symptoms ? No loss of water, never overheats, no signs of water in oil or vice versa. Dont want to get head done if no need but why would I be down on compression in just 1 cylinder ?? Please help.