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I've had a whining for a number of years. It's heard in the cabin at 2,000rpm and sounds similar to a Supercharger whine and it's rather annoying. Any suggestions what I can causing the whine? I forgot to note it's an LS1 Edited by user Friday, 3 May 2019 8:33:04 PM(UTC)
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Is it all the time or sporadic? Does it do it more when hot or cold, or temp makes no difference? Does it matter what gear you're in or does it do it in all gears?
If it's purely engine speed related, and is sometimes louder or quieter, then I'd be thinking it's the alternator (assuming it's not a loud whine).
Alternators will whine for a while after a cold start (or with high loads), and the whine can be much more pronounced at a certain RPM.
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Cheers,
Mick
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Cold it is rather quiet and when warmed it whine gets louder as engine reaches running temperature.
When at running temperature it's engine speed related; above idle and gets louder at the engine rpm gets higher. The nature of the whine doesn't alter; it's the same in every gear.
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Timing chain and gears ?
Oil pump
or plastic lifer buckets are cracked.
Have a good look at your PCV as it should of been replaced by now.
How many KM is up on it, is it original.
Could be just the throughout bearing, put your foot on the clutch at that rev and see.
Get a stethoscope out and search about like.
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It's done 265,000kms
I've diagnosed the it as a noisy power steering pump; it makes the same noise when turning lock to lock at low speed.
Not too sure why it's noisy though; I put a seal kit about 4 years ago and the pump is internally the same as my both my HQ and VN -both which where never noisy despite covering far more kilometers then my VY.
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Change it. They leak down onto the alternator and short them out. My V2 had it happen, cost me less than $200 for a replacement pump but $650 exchange for an alternator! |
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Okay, I just checked it, there is a wet patch under the pump. The alternator is still charging; it's not effected yet.. BTW, does anyone know why there is a small metal restrictor in the rubber return line near the reservoir? I didn't slide it in while I installed a new hose. Edited by user Thursday, 6 June 2019 3:18:15 PM(UTC)
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Restrictors in the return line help provide a slight amount of positive pressure. This helps to prevent the oil from aerating after the sudden change in pressure (high pressure, restricted flow to the valve in the rack, and otherwise unrestricted flow back to the reservoir). |
Cheers,
Mick
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I think the 'restrictor' that Shearer is referring to is actually just a brass tube to prevent the plastic fitting from collapsing when the clamp is tightened.
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I bought a new pump and the noise it no more, in fact not only quieter but smoother too
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