ok i still cant seem to get rid of this bloody rattle and it is really starting to do my head in. ok when ticking over cars sounds fine i can rev up the engine and still sounds fine. Now when i take it out for a run all is ok until i push a little harder. as soon as get some boost i get this annoying rattle (metalic). the more boost the louder the rattle. i have checked heat shield around turbos and they seem fine. it seems to be coming from front passenger side. is there anything that i may have missed. iv also checked brake disk plate and also seems fine. :headvswal:headvswal:headvswal:mad::mad:

detonation, possible bottom end rattle, thats how mine sounds at times, pop the bonnet and rev the car slightly to about 3000rpm, then release, do this repeatedly and quickly, if you hear a knocking then its fooked

its more a rattle than a knock but i will try anything at this stage. tnx stella

mine sounds like a rattle when driving, wasnt till i popped the bonnet that i found the rattle to be a knocking

on my way out now to see. 2 mins

you may have to get it warm first

ok mate i just done that and the engine is as quiet as a mouse. rev'd it several times and no rattle or knock. the mystery continues. as i said it only seems to happen when i am driving and boost it.

 

o and i am only just back from town so the engine was warm.

maybe a turbo propeller hitting the sides of a turbo, hinting at maybe a loose shaft ooeer lol

 

could also be a timing belt tensioner knacked

yea very maybe a tensioner. i was thinking the same. another bitch of a job. but not as bad as the turbo shaft. wouldnt the timing belt tensioner rattle when rev'd sittin stationary in the yard though.

actually it would yes, so would suggest your noise could be something like a turbo or maybe clutch related, will put me thinking cap on and have another stella and see if i can come up with anything else

cheers mate. i had it over the pit today for hours pulling and banging on things to check if they are loose. to give u an idea of the sound its like a socket stuck in the exhaust. wish it was now.

maybe the baffles in the exhaust are shot, sounds very much like a possible turbo prob

baffles in exhaust? could be the turbo. hope not. she boosts fine tho.

baffles are the things that keep things quiet and they sometimes come loose and rattle ablout

where r they. my exhaust is stainless steel front to back.

on another thread someone mentioned that the aircom pump might cause this. but it should rattle when standing still and rev'd if it was that rite.

i am thinkin of jacking up the back wheels and putting it in 2nd gear and boosting it cause i am so out of ideas. not the best idea iv ever had tho. might locate the bloody rattle tho.

but the shaft would rattle more under load would it not?????

yea gonna try that now before the lifting of rear wheels.

wouldnt lift the wheels lol, if it jumps off the jacks you will end up with a car on full boost shooting off into whatever its facing lol

true stella very true. i dunno. pissin me off now. we have a meet next weekend and i want it sorted by then cause its a long drive.

not the aircon so i am going for a rear wheel lift to locate the prob. i have a mate to help me so he can stay in the car just in case it drops. will report back soon.

May sound daft, but I had a stone stuck on top of the exhaust bracket (one that goes across the tunnel) This was causing an annoying rattle.

Sounds like detonation to me. It will sound like a stone or a marble in a tin can and its shakeing. some say like a crisp packet being scruntched up?

 

If its only on boost this will be the problem. If it was anything else mentioned above then it will do it all the time through out the rev range imo.

 

Do you have a boost controller??

ok lifted my rear wheels and went through the gears but she doesnt hit boost for some reason and no rattle. i have no boost controller. would a det problem show up on conzult? i presume it would.

get it on a rolling road and it should show up mate.