New water pump moaning noise

New water pump moaning noise

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Lynx101

Original Poster:

1 posts

17 months

Wednesday 14th June 2023
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Hi. I just changed timing belt (INA kit, belt made in Germany, tensioners made in Slovakia), and water pump (Circoli), plus drive belt (INA). Also replaced coolant.

Started the engine, nothing special to hear for a minute or two, when I began to hear an irregular harsh-ing noise, as if something spinning was touching a stationary part. Soon the noise turned into a regular higher pitched moan, still rather quietly sounding. When I went to place a brick against the accelerator to quicken the engine heating up, the noise became much higher pitched, increasing in loudness and pitch with the acceleration.

I took the car (Astra J, 2011, diesel 1.7 cdti) for a ride on the motorway, nothing unusual, except for the turbo like whistle sound that wasn't there before the new parts placement.
Next day, took everything apart again, no water pump removal obviously, timing belt seemed perfectly guiding on the pulleys, I readjusted its tension a bit by loosening the tensioner, surely not tight especially now after checking it.

When I moved the water pump disk (the thing that the pulley goes onto) by hand, there was a squeak, remember new water pump. Put everything back together, the moaning-whistle turbo sound still there, which makes me believe it can't be anything else than the water pump.

My question, what can go wrong if I leave it that way, for, say, good months, a year, at least. It doesn't leak, it wasn't sticking, when I tried it by hand without the drive belt... What could go wrong, start leaking, right? In which moment I simply replace it. Right?

I mean, the old one was spinning by hand when removed, in steps, not smoothly, it had some skipings, as some potentiometers have, which means it was spinning harder, and soon it would've failed anyway. The new one can't get as bad as that so soon, I suppose. But, I let you decide, if there are folks up here who have more experience than I have.

I appreciate!

E-bmw

9,976 posts

159 months

Thursday 15th June 2023
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For me, if it is making a noise, it shouldn't so it needs fixing.

As to what may or may not be the outcome, who knows, it may be fine & last forever, it may implode next week, the likelihood is it will be somewhere between those 2 options.