Cold Weather - Very Strange Gearbox Noise

[lowbro]

All,

The last few mornings in Brisbane has seen the temperature drop.

My manual gearbox/clutch has experienced the strangest noise over the past 2 monrings while driving before all lubricants get to a decent operating temperature in my 34gtt coupe.

The noise is very hard to explain, but almost sounds like a kettle on the boil with a slight whistle when you give it some gas and when gauges get to operating temp it just stops, any ideas? *kind of sounds like air is being pressured out of a blow hole or something when you give it some gas in any gear!!

I know that the clutch needs a change soon, (standard clutch) and I am wondering if a component/bearing is feeling the cold weather??

I am parking it in the garage tonight to see if it is just temperature related as it has only happened on the last couple of coldest mornings.

Anyone out there had a similair experience??

Edited May 15, 2012 by lowbro

[The Dan]

You have a blown exhaust/turbo gasket

[lowbro]

Hi Dan,

Yes at first I had thought that it may be turbo outlet related with the noise that was made but it so sounded like it was coming from the box, I did the park in the garage trick last night and the whirl/whistle noise was only there for a very short period before operating temps got up there and nowhere near as noisy as the last few morning, and guess what I have also noticed tonight, there is a dump pipe bolt missing at the turbo housing, so you could be exactly right that when it is really cold and the metals have not expanded before everything gets to op-temps then air could be making its way out and making this bizzare whirling/whistle type noise.

And guess which one it is, the darn bolt that is near impossible to get at on the inner/top right when looking into the bay from the passenger side ; (

[Old Booster]

Hmmm after searching the forums it seems I have a very similar problem. On cold morning starts it almost sounds like the engine is knocking quite badly, and when you pop the bonnet you can't hear the knocking but can hear a loud hissing coming from the passenger side area around the front of the exhaust. During the day or after the engine is warmed up the knocking and hissing sounds disappear.

Daniel,

if you could PM me a quote to change the exhaust / turbo gasket it would be muchly appreciated, car is a stock R32 gtst.

Cheers Mike.