LPT Engine whistles

Dr. Rog · Sep 3rd, 2010, 20:20

Hi, me again.

My "new" 940 SE LTP has a two-tone engine note on full throttle. A lower "normal" note and a high whine. I don't think its the turbo, more likely belts.

The seller, after I had given him my dosh, warned me to keep the oil level up to avoid starving the turbo, which he had been warned would make a high pitched scream if so abused. (A phenomenon I never experienced with my GLE, despite it getting low several times as it deteriorated.)

I have had issues with a noisy timing belt tensioner before, but that was different to this. (mmm?)

Anyone got any comments? Needless to say your ideas are only the starting point of an investigation.

Jim760 · Sep 3rd, 2010, 20:30

manual car? could be the dual mass flywheel making the whine

CTCNetwork · Sep 3rd, 2010, 20:45

Hi,

More than likely it will be cracks in the manifold/turbo. Common "feature" I hear tell. Mine has them and I get a whistle from the engine when cracking up..

Des. . .

Dr. Rog · Sep 4th, 2010, 08:56

Its an automatic.

Cracked manifold? Ouch. Certainly worth investigating.

Thanks chaps.

PS just noticed that "Thread subscription" defaults to "Do not subscribe". That explains a few things.

CTCNetwork · Sep 4th, 2010, 10:51

Hi,

Quote:

Originally Posted by Dr. Rog

Its an automatic.

Cracked manifold? Ouch. Certainly worth investigating.

Not as bad as it sounds, and likely no action need be taken for a while as yet.

Quote:

Originally Posted by Dr. Rog

PS just noticed that "Thread subscription" defaults to "Do not subscribe". That explains a few things.

Yes, that is the default setting. Good if you are aware as you can then subscribe to only those topics you really are looking at..

Des. . .

Dr. Rog · Nov 19th, 2010, 21:47

This was probably a blowing exhaust gasket.

http://www.volvoforums.org.uk/showth...487#post745487

Sep 3rd, 2010, 20:20	#1
Dr. Rog Master Member Last Online: Oct 21st, 2017 22:15 Join Date: Aug 2010 Location: Kingsclere	LPT Engine whistles Hi, me again. My "new" 940 SE LTP has a two-tone engine note on full throttle. A lower "normal" note and a high whine. I don't think its the turbo, more likely belts. The seller, after I had given him my dosh, warned me to keep the oil level up to avoid starving the turbo, which he had been warned would make a high pitched scream if so abused. (A phenomenon I never experienced with my GLE, despite it getting low several times as it deteriorated.) I have had issues with a noisy timing belt tensioner before, but that was different to this. (mmm?) Anyone got any comments? Needless to say your ideas are only the starting point of an investigation. __________________ Cheers Rog Previously owned 1996 940 SE auto and GLE manual, both B230FK estates.

Sep 3rd, 2010, 20:30	#2
Jim760 Mr G Last Online: Jun 12th, 2020 19:11 Join Date: May 2007 Location: north yorkshire	manual car? could be the dual mass flywheel making the whine __________________ will the jimousine ride again? previous models 940 TDI360 GLT 480 ES 740 GLE 940 SE 760 Executive 940 GL 850 GL 760 TIC V70 Torslanda

Sep 3rd, 2010, 20:45	#3
CTCNetwork Forum Support Team Join Date: Dec 2004 Location: Liège, Belgium View Photos By: CTCNetwork	Hi, More than likely it will be cracks in the manifold/turbo. Common "feature" I hear tell. Mine has them and I get a whistle from the engine when cracking up.. Des. . . __________________ Density:- Not just a measurement ~ It's a whole way of Life.! ! ! I drive a Volvo, Please Don't Get In My Way! OldVolvos4Ever He shows up. People die. He vanishes. People should not be afraid of their governments. "He'll deliver more justice in a weekend than 10 years of your Governments should be afraid of their people... "V" courts & tribunals. Just stay out of his way." "I plan to."

Sep 4th, 2010, 08:56	#4
Dr. Rog Master Member Last Online: Oct 21st, 2017 22:15 Join Date: Aug 2010 Location: Kingsclere	Its an automatic. Cracked manifold? Ouch. Certainly worth investigating. Thanks chaps. PS just noticed that "Thread subscription" defaults to "Do not subscribe". That explains a few things. __________________ Cheers Rog Previously owned 1996 940 SE auto and GLE manual, both B230FK estates.

Nov 19th, 2010, 21:47	#6
Dr. Rog Master Member Last Online: Oct 21st, 2017 22:15 Join Date: Aug 2010 Location: Kingsclere	This was probably a blowing exhaust gasket. http://www.volvoforums.org.uk/showth...487#post745487 __________________ Cheers Rog Previously owned 1996 940 SE auto and GLE manual, both B230FK estates.

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