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Omega Help Area => Omega General Help => Topic started by: Radiomarko on 05 December 2010, 21:07:19

Title: Screech diagnosis
Post by: Radiomarko on 05 December 2010, 21:07:19
Nasty screech developed from engine area.

Worse when cold start, or after idle, sometimes at random. Just about goes when warmed up.

I suspect the usual water pump/alternator. Does the accessory belt have a tensioner that would screech when on it's way out?

Any other suspects? I'd like to be armed when taking it to garage.   ;D
Title: Re: Screech diagnosis
Post by: Omegatoy on 05 December 2010, 21:17:33
Quote
Nasty screech developed from engine area.

Worse when cold start, or after idle, sometimes at random. Just about goes when warmed up.

I suspect the usual water pump/alternator. Does the accessory belt have a tensioner that would screech when on it's way out?

Any other suspects? I'd like to be armed when taking it to garage.   ;D

tensioner has a finite movement when tensioning, also it weras its bushes so has less movement, its well known fault that the actual arm seizes on it bearing, so best way to sort it is to
A, remove large cap on end of tensioner pivot and make sure it moves freely if not oil and greas it
Bwhilst there insert new belt , when they have stretched they screech on switch off
C check play n spring loaded tensioner metal bushes if worn either make new bushes r replace tensioner :y
Title: Re: Screech diagnosis
Post by: fiend61 on 05 December 2010, 21:43:21
Quote
tensioner has a finite movement when tensioning, also it weras its bushes so has less movement, its well known fault that the actual arm seizes on it bearing, so best way to sort it is to
A, remove large cap on end of tensioner pivot and make sure it moves freely if not oil and greas it
Bwhilst there insert new belt , when they have stretched they screech on switch off
C check play n spring loaded tensioner metal bushes if worn either make new bushes r replace tensioner
just to add to this the pully on the aux belt can make a screeching noise, this are available eperate to the tensioner (as i found to my cost) >:(
Title: Re: Screech diagnosis
Post by: Radiomarko on 06 December 2010, 08:20:54
Thanks a lot folks, I'll get them to check the tensioner parts also. Forewarned is forearmed.
Title: Re: Screech diagnosis
Post by: TheBoy on 06 December 2010, 09:24:17
Quote
Quote
tensioner has a finite movement when tensioning, also it weras its bushes so has less movement, its well known fault that the actual arm seizes on it bearing, so best way to sort it is to
A, remove large cap on end of tensioner pivot and make sure it moves freely if not oil and greas it
Bwhilst there insert new belt , when they have stretched they screech on switch off
C check play n spring loaded tensioner metal bushes if worn either make new bushes r replace tensioner
just to add to this the pully on the aux belt can make a screeching noise, this are available eperate to the tensioner (as i found to my cost) >:(
Remember Radiomarko's is a TD, not a V6, and has a very different crappy BMW tensioner that is even more prone to failures than the GM V6 ones :o
Title: Re: Screech diagnosis
Post by: Radiomarko on 06 December 2010, 16:44:36
Aha... good advice, checked in service history and was replaced with aux belt in 2005...I'll get it done even if that isnt the screech.

update: In garage now.   :-X
Title: Re: Screech diagnosis
Post by: Radiomarko on 07 December 2010, 17:20:48
You guys were 100% correct, the aux belt tensioner was seized. Now sorted.

He was unable to undo the fuel filter housing to change the filter as it was seized, try again when weather warms up he suggested.....  :(
Title: Re: Screech diagnosis
Post by: Omegatoy on 07 December 2010, 18:58:16
Quote
You guys were 100% correct, the aux belt tensioner was seized. Now sorted.

He was unable to undo the fuel filter housing to change the filter as it was seized, try again when weather warms up he suggested.....  :(

nice one!!! :y