Engine whine - is this normal or too loud?

gn3dr · **Posted:** Sun Sep 21, 2014 10:07 pm

Looking for some input. Just got my car running after a year of on and off working on it. I fitted new belts to it myself. Now I can hear a whine from the front of the engine. I bought the car as a non-runner and don't have exposure here to another running 944 so I have no baseline. I assume they all whine a bit due to the belts right out front but is mine too loud. If so is it likely to be a belt too tight or a bearing making noise in a pulley? ( I didn't change any idlers as I thought they were all OK.

Hopefully the sound will be ok here.
[youtube]Porsche 944 whine: http://youtu.be/U9gQheqgVso[/youtube]

tr7v8 · **Posted:** Mon Sep 22, 2014 9:15 am

Can't watch the video as it is private

Waylander · **Posted:** Mon Sep 22, 2014 9:44 am

the old boy at east London Porsche told me if it sings loudly its to tight, if its quiet its too loose, it should sing just gently like a bit of alternator whine.

tr7v8 · **Posted:** Mon Sep 22, 2014 9:48 am

Waylander wrote:

the old boy at east London Porsche told me if it sings loudly its to tight, if its quiet its too loose, it should sing just gently like a bit of alternator whine.

I'd agree with that. New ones are quite load & take a few 1000miles to quieten down though.

Matey · **Posted:** Mon Sep 22, 2014 11:51 am

The balance belt idler near the bottom has a sweet spot too, if it's not right it'll whine.

gn3dr · **Posted:** Mon Sep 22, 2014 5:32 pm

Oops - epic fail as the kids would say on the you tube video upload. My first you tube video!
It is public view now.
I was considering doing nothing until there was a few miles on the belts just to see if they wouldvquiten down, but just wanted to be sure first.

timmyturtle · **Posted:** Mon Sep 22, 2014 6:24 pm

Ive put 40 miles on mine and its not quite as loud as before

tr7v8 · **Posted:** Mon Sep 22, 2014 6:41 pm

Not too bad, put some miles on it, check it doesn't get worse. After 1500miles or so they'll need tension checked & adjusted. It'll still whine after but not as loud.
Edited to say, I assume ALL the idlers & tensioners were checked whilst the belts were being changed. Also was the water pump OK.

deLUX · **Posted:** Mon Sep 22, 2014 9:13 pm

Sounds good! We'll done

gn3dr · **Posted:** Mon Sep 22, 2014 10:20 pm

Thanks folks
Idlers were checked and seemed OK. No play anyway.
Water pump was not changed - it seemed OK and wasn't teh first day pump so am hoping it is recent enough. Ideally yes I would have changed it but I was buying so many parts last year when I was collecting bits for the rebuild that it felt like I was heamorrhaging cash! and the water pumps are not cheap. Hopefully that wasn't a false economy.....

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Engine whine - is this normal or too loud?

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