I got the feeling the first mechanic doesn't usually do head gaskets or didn't want to do it on this truck. Thanks for the reply! It seems to be the same noise at start up as after it warms up. I sometimes get just a hint of maybe one chirp at ignition (this has only started recently) At idle it does not chirp but if you go under the hood it does sound like a faint puffing noise from the passenger side of the engine at idle. If you rev the engine over about 3000 rpms you will get a chirping/tapping noise at first rev. If you are driving you will get a chirping tapping over about 1100 rpms. The noise stops if you back off the gas. From inside the car it sounds a little like morse code with a bit of a squeek. Faster, constant tapping and louder at higher rpms. Intermittent at lower rpms (the noise skips) The 2nd mechanic said he smoke tested it and it came out fine but I am going to crawl under it now and look at the underside of the the exhaust manifold and try tightening the bolts. It is from near that area or the nearby head gasket near cylinders 6 & 8 that I could feel a puffing when engine is really revved. I did notice that both exhaust manifolds have three gaskets on them which makes me suspect there was a problem here in the past. Just want to make sure I'm not missing something simple before deciding it's the head gaskets. Am I just not wanting to admit the inevitable?
2004 Land Rover Discovery II 4.6L V8 with 65,000 miles
Last edited by adamstennett; 11-21-2012 at 10:11 AM.