Noise from engine when cold

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zeeshanzaki
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Noise from engine when cold

Unread post by zeeshanzaki »

I noticed screeching noise coming from middle of the engine where a grey connector is connected. It goes away when the card warm up. Is this normal or something need attention.

I have attached location of noise and sound file.
Attachments
Citroen noise.zip
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Citroen Engine Connector.JPG
Last edited by zeeshanzaki on 31 May 2020, 12:18, edited 1 time in total.

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bobins
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Re: Noice from engine when cold

Unread post by bobins »

Which engine and what year ?

zeeshanzaki
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Re: Noice from engine when cold

Unread post by zeeshanzaki »

v6 petrol 2001

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xantia_v6
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Re: Noice from engine when cold

Unread post by xantia_v6 »

The noise does not seem normal. I think that the part in your photo may be the idle air valve, but I have not heard one making that noise.

Check that the rubber damper on the crankshaft pulley is not slipping, paint a mark accross both parts of the pulley then run the engine and check it.

zeeshanzaki
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Joined: 18 Jul 2017, 11:07
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Re: Noice from engine when cold

Unread post by zeeshanzaki »

It may not be the idle air valve but the noise is from the surrounding area.
Where is rubber damper located.

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xantia_v6
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Re: Noise from engine when cold

Unread post by xantia_v6 »

The crank pulley damper is part of the pulley on the end of the crankshaft that drives the alternator, A/C, (etc.). They are a common cause of loud squealing on these engines.

If your car has manual transmission, the noise could be the clutch throw-out bearing. Try starting the engine with the clutch pedal pressed and see if the noise disappears.

If your car has automatic transmission (4HP20 I expect), then the noise could be a warning of imminent transmission failure due to a blocked transmission oil filter. This requires engine removal to replace, but quickly results in a destroyed transmission if not replaced.

zeeshanzaki
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Re: Noise from engine when cold

Unread post by zeeshanzaki »

The noise coming from engine and only when cold after that its normal. I am noticing this noise since a year. Before it only used to come for few seconds when engine startup. But now it is lasting little longer.

All this problem started when i changed bsm unit(a fuse box) to fix headlight issue as it used stay on once year. Car was rough idle and transmission went into limp mode. So i did bsi reset and it fixed. Then i reinstall original bsm and driven for a week. Then last week i wanted to check transmission to see if it requies oil change, so raised the suspension as soon as started the car then it gave catalyst error with cylinder 6 misfire. Luckly i had new spare coil so replaced the coil. Started the car and it didnt go over 1500rpm. So replugged main connector on the engine as it always gives trouble whenever i do any work. After that it started and running perfect. I drive the car in manual and sports mode without any issue.