re-tension cambelt at regular intervals?

kentplums · Sep 28th, 2010, 16:17

hi
I'm in the process of replacing my waterpump (940 se turbo 2.3 1994/5) and noticed (as the timing upper cover is removed ) that theer is a small amount of play on longest run of cam belt (1/2 inch or so). should i loosen and retighten tensioner to take up any slack? the belt was replaced 10,000 miles ago and i dont think it has ever been retensioned.
thanks
R

CTCNetwork · Sep 28th, 2010, 19:01

HI,

Your tensioner may be going/gone south as it should maintain tension in the belt.

I would change that and get the belt re-tensioned.

Des. . .

Clan · Sep 28th, 2010, 19:34

Part of the first service was to slacken the nut and tighten it to retension the belt but that was it for the life of the belt , your play may have just been the way the engine stopped, ie rotated backwards a touch before coming to rest ...

vjck_uk · Sep 28th, 2010, 20:25

with a spring to set the tension and then clamped to be a fixed tensioner it has got to go slack with use due to the belt sitting lower on the pulleys and a very slight stretch,i used to slack my clamp bolt off each year to let it take any slack up

Dr. Rog · Sep 28th, 2010, 21:51

What exactly do you mean by play. You push it and it moves?

My car is a similar era and has a sprung tensioner, so there is no slack, but pushing the belt can compress the spring. The spring is very stiff indeed and so I think 1/2" sounds too much.

If there is no tension in the belt you risk slipping a tooth and wrecking the engine so some urgency to confirm or rectify is required.

roadcar2000 · Sep 29th, 2010, 02:11

Yes at regular intervals slacken and retighten the nut. 8-10000miles or 1000 miles initially after fitting new belt

kentplums · Sep 29th, 2010, 17:39

thanks to everyone. i'll do as roadcar has said
cheers

Sep 28th, 2010, 16:17	#1
kentplums New Member Last Online: Aug 31st, 2015 14:07 Join Date: Aug 2010 Location: vayres	re-tension cambelt at regular intervals? hi I'm in the process of replacing my waterpump (940 se turbo 2.3 1994/5) and noticed (as the timing upper cover is removed ) that theer is a small amount of play on longest run of cam belt (1/2 inch or so). should i loosen and retighten tensioner to take up any slack? the belt was replaced 10,000 miles ago and i dont think it has ever been retensioned. thanks R

Sep 28th, 2010, 19:01	#2
CTCNetwork Forum Support Team Join Date: Dec 2004 Location: Liège, Belgium View Photos By: CTCNetwork	HI, Your tensioner may be going/gone south as it should maintain tension in the belt. I would change that and get the belt re-tensioned. 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 28th, 2010, 19:34	#3
Clan Experienced Member Last Online: Today 11:31 Join Date: Jun 2007 Location: L/H side	Part of the first service was to slacken the nut and tighten it to retension the belt but that was it for the life of the belt , your play may have just been the way the engine stopped, ie rotated backwards a touch before coming to rest ... __________________ My comments are only based on my opinions and vast experience .

Sep 28th, 2010, 21:51	#5
Dr. Rog Master Member Last Online: Oct 21st, 2017 22:15 Join Date: Aug 2010 Location: Kingsclere	Play? What exactly do you mean by play. You push it and it moves? My car is a similar era and has a sprung tensioner, so there is no slack, but pushing the belt can compress the spring. The spring is very stiff indeed and so I think 1/2" sounds too much. If there is no tension in the belt you risk slipping a tooth and wrecking the engine so some urgency to confirm or rectify is required. __________________ Cheers Rog Previously owned 1996 940 SE auto and GLE manual, both B230FK estates.

Sep 28th, 2010, 20:25	#4
vjck_uk Premier member Last Online: Jul 29th, 2017 15:54 Join Date: Nov 2002 Location: southern edge of birmingham	with a spring to set the tension and then clamped to be a fixed tensioner it has got to go slack with use due to the belt sitting lower on the pulleys and a very slight stretch,i used to slack my clamp bolt off each year to let it take any slack up

Sep 29th, 2010, 02:11	#6
roadcar2000 Senior Member Last Online: Jun 2nd, 2023 11:46 Join Date: Jul 2010 Location: gosport	Yes at regular intervals slacken and retighten the nut. 8-10000miles or 1000 miles initially after fitting new belt

Sep 29th, 2010, 17:39	#7
kentplums New Member Last Online: Aug 31st, 2015 14:07 Join Date: Aug 2010 Location: vayres	thanks to everyone. i'll do as roadcar has said cheers

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