Weird whistling noise B5254S engine

Johan850alt1 · Oct 30th, 2023, 21:56

Anyone familiar with the sound in the video?
https://youtube.com/shorts/lTlO5LFG-...cZ8EKCVc5wd1cm

I tried several things at tension belt, but it really seems inside engine noise coming from the cylinder head.
Maybe bad sprocket adjustment? (Not altered that I am aware of….)

I just think it is not a normal sound.

Clan · Oct 30th, 2023, 23:44

Quote:

Originally Posted by Johan850alt1

Anyone familiar with the sound in the video?
https://youtube.com/shorts/lTlO5LFG-...cZ8EKCVc5wd1cm

I tried several things at tension belt, but it really seems inside engine noise coming from the cylinder head.
Maybe bad sprocket adjustment? (Not altered that I am aware of….)

I just think it is not a normal sound.

There are 2 noises there, both cambelt related?

Johan850alt1 · Oct 31st, 2023, 05:15

Quote:

Originally Posted by Clan

There are 2 noises there, both cambelt related?

I am not sure, cambelt was replaced but also cylinderhead had been off...

How can I figure out is cambelt is ok?

Clan · Oct 31st, 2023, 07:53

Quote:

Originally Posted by Johan850alt1

I am not sure, cambelt was replaced but also cylinderhead had been off...

How can I figure out is cambelt is ok?

only by someone experienced looking at it, did you use genuine volvo parts? it is a must...

Johan850alt1 · Oct 31st, 2023, 10:47

Quote:

Originally Posted by Clan

only by someone experienced looking at it, did you use genuine volvo parts? it is a must...

not all original, but new parts from skandix.de including new tensioner

Can it also be something from inner engine?

Baffler · Nov 1st, 2023, 17:02

To my ears it sounds like a rough bearing so could it be auxiliary belt related? Try removing the auxiliary belt and run the engine to see if noise goes away. If indeed it goes away switch off the engine and inspect all auxiliary related pulleys, power steering pump, alternator and air-con pulley are spinning freely and smooth.

Not sure if your engine has an alternator overrun pulley or not...?

Johan850alt1 · Nov 1st, 2023, 19:38

Quote:

Originally Posted by Baffler

To my ears it sounds like a rough bearing so could it be auxiliary belt related? Try removing the auxiliary belt and run the engine to see if noise goes away. If indeed it goes away switch off the engine and inspect all auxiliary related pulleys, power steering pump, alternator and air-con pulley are spinning freely and smooth.

Not sure if your engine has an alternator overrun pulley or not...?

Al pulleys Are practically new. I tried with auxiliary belt. No change.
I think best try is to take off cam belt and check water pump and pulleys…otherwise 🙈

Oct 30th, 2023, 21:56	#1
Johan850alt1 New Member Last Online: Apr 14th, 2024 16:13 Join Date: Jan 2023 Location: Groningen	Weird whistling noise B5254S engine Anyone familiar with the sound in the video? https://youtube.com/shorts/lTlO5LFG-...cZ8EKCVc5wd1cm I tried several things at tension belt, but it really seems inside engine noise coming from the cylinder head. Maybe bad sprocket adjustment? (Not altered that I am aware of….) I just think it is not a normal sound.

Nov 1st, 2023, 17:02	#6
Baffler Premier Member Last Online: Yesterday 21:18 Join Date: Dec 2002 Location: Co. Limerick, Ireland	To my ears it sounds like a rough bearing so could it be auxiliary belt related? Try removing the auxiliary belt and run the engine to see if noise goes away. If indeed it goes away switch off the engine and inspect all auxiliary related pulleys, power steering pump, alternator and air-con pulley are spinning freely and smooth. Not sure if your engine has an alternator overrun pulley or not...? __________________ Liam... '96 854 TDI SE, '99 V70 2.5D S, '05 C70 2.0T Collection, '05 S80 2.0T SE, '15 V70 D4 SE Lux Nav.

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