Belt Tensioner.

Mikem · 12th April 2021, 10:26

I had a V belt shred on me 75 CDTI. (the one that drive just about everything)
Located a new belt, proceeded to fit new belt. all was good to this point !!

Got new belt in place, tried to move the belt tensioner with 24mm ring spanner clockwise direction. The tensioner only moved about 5mm. I assume the mechanism is ceased or broken.

I have searched the net for a procedure to replace it. No joy.
Can anyone give me a guide as to the replacement procedure. It looks as if the engine has to be dropped??

Any help will be much appreciated.
Regards to all
Mike

Atlan · 12th April 2021, 10:43

Try here: https://the75andztclub.co.uk/forum/s...d.php?t=212679
or here https://cse.google.com/cse?cx=013872...39.pjYF80d30eo

Arctic · 12th April 2021, 13:11

Quote:

Originally Posted by Mikem

I had a V belt shred on me 75 CDTI. (the one that drive just about everything)
Located a new belt, proceeded to fit new belt. all was good to this point !!

Got new belt in place, tried to move the belt tensioner with 24mm ring spanner clockwise direction. The tensioner only moved about 5mm. I assume the mechanism is ceased or broken.

I have searched the net for a procedure to replace it. No joy.
Can anyone give me a guide as to the replacement procedure. It looks as if the engine has to be dropped??

Any help will be much appreciated.
Regards to all
Mike

Hi Mike.
The auxiliary belt is a five ribbed belt, only fit a decent belt such as gates below.
https://www.ebay.co.uk/itm/152630183737

You need to get some leverage on the tensioner nut maybe use an aviation spanner as they are longer so more leverage.

peel back the wheel arch liner you get more access that way in my opinion.

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1a

Fit the spanner as far left as possible so you get good leverage.

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I would check and change the compressor belt as well at the same time as that belt seems to crack wear more that the large belt.
https://www.ebay.co.uk/itm/162597598422

Note the compressor belt cracking

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So it looks like you need to get more leverage on the tensioner.

Mike Noc · 12th April 2021, 13:25

Mike is the spanner moving but not pulling the tensioner back? If so then you need to get a spanner on the nut at the back and tighten it up - it is a left hand thread.

75driver · 12th April 2021, 18:41

FWIW, the last time I done this, I had to tap a small wedge of wood between the ring end of the spanner and the chassis leg (once the ring end was over the tensioner nut &#128556

to stop the spanner slipping off / rounding the nut.

Sent from my iPhone using Tapatalk

YHT · 27th June 2021, 18:07

Am part way through replacing the alternator on my CDT and have got to the point of having a spanner on the auxiliary belt tensioner and trying to remove the tension from the belt. PROBLEM! The hex head of the tensioner rotates as if the tensioner bolt is loose. How do I tighten it up in place or do I have to remove stuff to get it off and do it on the bench?

trikey · 27th June 2021, 19:12

Quote:

Originally Posted by YHT

Am part way through replacing the alternator on my CDT and have got to the point of having a spanner on the auxiliary belt tensioner and trying to remove the tension from the belt. PROBLEM! The hex head of the tensioner rotates as if the tensioner bolt is loose. How do I tighten it up in place or do I have to remove stuff to get it off and do it on the bench?

If you have the alternator off you have a little more room to wiggle a 13mm spanner into the rear of the tensioner and hold the nut while you tighten the 24mm nut on the front, as Mike Noc says, its a LH thread, give it a good nip up and you will be able to move the pulley easily when you need to refit the belt.

Arctic · 27th June 2021, 19:49

Quote:

Originally Posted by trikey

If you have the alternator off you have a little more room to wiggle a 13mm spanner into the rear of the tensioner and hold the nut while you tighten the 24mm nut on the front, as Mike Noc says, its a LH thread, give it a good nip up and you will be able to move the pulley easily when you need to refit the belt.

As above

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2

trikey · 27th June 2021, 20:11

Always easier when you see a pic, nice one

COLVERT · 27th June 2021, 20:39

YHT.--Come back and read the above posts.---They are the answer to your question.---

12th April 2021, 10:43	#2
Atlan Avid contributor rover 75 Join Date: May 2016 Location: Home Posts: 203 Thanks: 6 Thanked 99 Times in 70 Posts	Try here: https://the75andztclub.co.uk/forum/s...d.php?t=212679 or here https://cse.google.com/cse?cx=013872...39.pjYF80d30eo __________________ Illegitimi non carborundum

12th April 2021, 18:41	#5
75driver Posted a thing or two Rover 75 saloon, manual. Rover 75 Tourer, Auto. Join Date: Jan 2013 Location: Newry Posts: 1,781 Thanks: 574 Thanked 443 Times in 371 Posts	FWIW, the last time I done this, I had to tap a small wedge of wood between the ring end of the spanner and the chassis leg (once the ring end was over the tensioner nut &#128556 to stop the spanner slipping off / rounding the nut. Sent from my iPhone using Tapatalk __________________ 2006 75 Contemporary SE diesel manual (#1) 2003 75T Connoisseur SE diesel auto (For Comfort) 2005 75 Connoisseur SE diesel auto (Marmite duotone ) 2006 75 Connoisseur SE diesel auto (The last one?) 2009 E220 (For a change) 2018 L200 (For Big & Heavy Things) 1976 W114 250 Manual (For Sundays)

27th June 2021, 18:07	#6
YHT Loves to post Rover 75 Saloon Join Date: Jun 2017 Location: suffolk Posts: 262 Thanks: 46 Thanked 25 Times in 23 Posts	CDT belt tensioner bolt loose? Am part way through replacing the alternator on my CDT and have got to the point of having a spanner on the auxiliary belt tensioner and trying to remove the tension from the belt. PROBLEM! The hex head of the tensioner rotates as if the tensioner bolt is loose. How do I tighten it up in place or do I have to remove stuff to get it off and do it on the bench?

27th June 2021, 20:11	#9
trikey Premium Trader Rover 75 Join Date: Nov 2010 Location: Devon Posts: 33,765 Thanks: 8,837 Thanked 14,831 Times in 8,030 Posts	Always easier when you see a pic, nice one __________________ Lest we forget..

12th April 2021, 10:26	#1
Mikem Newbie Rover 75 Saloon Join Date: Aug 2014 Location: Royal Wootton Bassett Posts: 11 Thanks: 0 Thanked 0 Times in 0 Posts	Belt Tensioner. I had a V belt shred on me 75 CDTI. (the one that drive just about everything) Located a new belt, proceeded to fit new belt. all was good to this point !! Got new belt in place, tried to move the belt tensioner with 24mm ring spanner clockwise direction. The tensioner only moved about 5mm. I assume the mechanism is ceased or broken. I have searched the net for a procedure to replace it. No joy. Can anyone give me a guide as to the replacement procedure. It looks as if the engine has to be dropped?? Any help will be much appreciated. Regards to all Mike

12th April 2021, 13:25	#4
Mike Noc This is my second home Rover 75 CDT Manual Connoisseur SE, Rover 75 CDT Automatic Connoisseur SE & a Freelander Td4. Join Date: Jul 2009 Location: Hampshire Posts: 11,547 Thanks: 3,470 Thanked 3,119 Times in 2,247 Posts	Mike is the spanner moving but not pulling the tensioner back? If so then you need to get a spanner on the nut at the back and tighten it up - it is a left hand thread.

27th June 2021, 20:39	#10
COLVERT This is my second home R75 Saloon. Join Date: Feb 2009 Location: France/or Devon. Posts: 14,003 Thanks: 3,851 Thanked 2,167 Times in 1,816 Posts	YHT.--Come back and read the above posts.---They are the answer to your question.---