It never seems to end, after replacing bearings & belt on the zd30 (due to a day out which involved only 1 mud hole) the old girl was as quiet as a mouse.
We went down south the following weekend & would have done a round trip of approx 1000k's no hick ups other than seeing how hot post turbo temps are due to newly installed exhaust temp gauge. Another whole week of driving went by with no dramas, the new Beaudesert exhaust had been ordered then out of the blue the missus was leaving work when she said this squealing started, she kept driving & the noise disappeared (that or the radio was turned up) when I got home she mentioned it so I went out & started up the car to this almighty noise.
After approx 10 seconds the noise disappears then every time you tap the throttle it squeals & disappears. First thoughts were idler pulley bearing or alternator so I removed serpentine belt so no pulleys were turning noise still the same.
Removed turbo inlet elbow to see/feel end float rotation of turbo. Rotates smoothly doesn't seem to be rubbing & minimal to no end float.
Also thought maybe exhaust gasket. The only thing that makes me change my mind is, when engine is cold the noise remains constant & disappears once engine begins to warm up. Once engine temp is up a little but not higher enough to register on temp gauge the noise disappears other than when you dab the accelerator pedal or switch the car off then back on again.
I'm a little lost for ideas & intend to sleep on it. I have had a read through some of the other threads previously written & I appear to have an opposite symptom compared to what others have had where there noise starts once the engine warms up.
Look forward to reading some ideas unless anyone knows a reputable mechanic in Perth they'd be happy to recommend?
Cheers Gutd3L
We went down south the following weekend & would have done a round trip of approx 1000k's no hick ups other than seeing how hot post turbo temps are due to newly installed exhaust temp gauge. Another whole week of driving went by with no dramas, the new Beaudesert exhaust had been ordered then out of the blue the missus was leaving work when she said this squealing started, she kept driving & the noise disappeared (that or the radio was turned up) when I got home she mentioned it so I went out & started up the car to this almighty noise.
After approx 10 seconds the noise disappears then every time you tap the throttle it squeals & disappears. First thoughts were idler pulley bearing or alternator so I removed serpentine belt so no pulleys were turning noise still the same.
Removed turbo inlet elbow to see/feel end float rotation of turbo. Rotates smoothly doesn't seem to be rubbing & minimal to no end float.
Also thought maybe exhaust gasket. The only thing that makes me change my mind is, when engine is cold the noise remains constant & disappears once engine begins to warm up. Once engine temp is up a little but not higher enough to register on temp gauge the noise disappears other than when you dab the accelerator pedal or switch the car off then back on again.
I'm a little lost for ideas & intend to sleep on it. I have had a read through some of the other threads previously written & I appear to have an opposite symptom compared to what others have had where there noise starts once the engine warms up.
Look forward to reading some ideas unless anyone knows a reputable mechanic in Perth they'd be happy to recommend?
Cheers Gutd3L