Thread: Noisy Turbo

I'd be taking it back with a "please explain"

I have the number of a mobile landy specialist mechanic in Sydney if you want him to have look, PM me

Andy at hard range reccomended him, not used him myself yet but the water pump is due AGAIN!

Originally Posted by MT

I had the same noise about five months ago. Turned out to be exactly as described above. Two trips to the workshop (replaced exhaust manifold gasket and studs, second trip to fix the fact that they didn't re-assemble correctly and oil was going everywhere...) and a hefty labour bill later , fixed. Or so I thought. Driving up from Canberra to Sydney today.... Same noise. Less than six months and 10,000 km later. Could this be right or a stuff up somehow by the workshop? I am trying to work out how first one lasts a decade and 150,000km , next one less than 6 months and 10k?
Any thoughts?
Thanks.

Because they didn't reassemble correctly or torque it up properly and correctly.

I originally posted this thread last winter when my TD5 was making a noise similar to a rusty roller skate bearing above 2000 rpm but for some reason the noise disappeared for 12 months but now it is back again. Don't know if it is related to the cold but I rather think it is just something loose.

What's prompted me to repost is that tonight for the first time I experienced what I would best describe as an intermittent loss of power or huge turbo lag. It would drive ok for a minute or two then it would die again. Interesting thing is.......the noise was gone!

I got home, had dinner, searched aulro and tugged and pulled all the relevant hoses as suggested without finding anything I could attribute to the problem. I got back in the car, drove around for about 15 minutes and could not reproduce the power loss, the whistle/squeeky bearing noise was back though!

I can't see any evidence of exhaust leak and I believe from the previous owners receipts that the manifold bolts have been upgraded. I also believe that the car has been chipped and has a larger intercooler installed. The car drives fine apart from tonight's new symptom.

Can anybody suggest ways I can narrow down where the noise is coming from or things to check?

I can't reproduce it from revving, it has to be under load or while driving.

Originally Posted by simpin68

I originally posted this thread last winter when my TD5 was making a noise similar to a rusty roller skate bearing above 2000 rpm but for some reason the noise disappeared for 12 months but now it is back again. Don't know if it is related to the cold but I rather think it is just something loose.

What's prompted me to repost is that tonight for the first time I experienced what I would best describe as an intermittent loss of power or huge turbo lag. It would drive ok for a minute or two then it would die again. Interesting thing is.......the noise was gone!

I got home, had dinner, searched aulro and tugged and pulled all the relevant hoses as suggested without finding anything I could attribute to the problem. I got back in the car, drove around for about 15 minutes and could not reproduce the power loss, the whistle/squeeky bearing noise was back though!

I can't see any evidence of exhaust leak and I believe from the previous owners receipts that the manifold bolts have been upgraded. I also believe that the car has been chipped and has a larger intercooler installed. The car drives fine apart from tonight's new symptom.

Can anybody suggest ways I can narrow down where the noise is coming from or things to check?

I can't reproduce it from revving, it has to be under load or while driving.

Just in case - also keep a close eye on your engine oil level, including checking the exhaust pipe for any "dripping".

Originally Posted by gavinwibrow

Just in case - also keep a close eye on your engine oil level, including checking the exhaust pipe for any "dripping".

Oils OK and no dripping.

The other thing I forgot to mention is when you flatten it for approx 10 secs the whistle/squeeking noised then dissappears. Almost like giving it some revs releases the pressure and the whistle stops. It returns soon after though.

I've had two noises.

The first was the turbo itself. A screaming noise under boost. Got a new turbo from UK for 450 pounds. I was advised to replaced turbo before it sprayed metal into the cylinders when the impeller disintegrated.

The second noise was a whistle under load. I thought it was rotational. Intermittent nature meant it was hard to pin down.Turned out to be manifold stud.

I had noise and vibration when driving through 2000/2200rpm it turned out to be the transmission brake rattling. Replaced the T/Brake springs and all was quiet. I had to tidy up the junk in the back because you could hear it now.
Ollie
Td5 Auto 2001 Dec

Originally Posted by Roberto

I've had two noises.

The first was the turbo itself. A screaming noise under boost. Got a new turbo from UK for 450 pounds. I was advised to replaced turbo before it sprayed metal into the cylinders when the impeller disintegrated.

The second noise was a whistle under load. I thought it was rotational. Intermittent nature meant it was hard to pin down.Turned out to be manifold stud.

Think this is what mine is doing. Would be easier to work out if I had a boost gauge.
But while under load above 2000rpm, I get a high pitch squeal like a idler bearing or a slipping belt. But if I hold the revs, once the load decreases slight the boost will drop even though the revs are the same. Thus less maniold pressure and the squeal goes.
Glad I ordered a inlet and exhaust gasket. Will give me something to do on my holidays.
Now to find a good thread on how to de stress the std manifold and then find some one that can machine it flat.