CDTI Aux belt tensioner will not move

frankgoldstar · 14th July 2020, 11:54

My crank pulley went, so I prepared to change it. I have the right pulley, having done this on my previous 75's. However, the aux belt tensioner will not release. The centre 24mm nut rotates, but the arm does not move.

I have done this job before, hence me having the spanner to get on the 24mm nut, but while it has not been easy, it has not been impossible before now.

So two questions for those experts who have taken the tensioner off in the past.

1. How do I take tension off when the centre nut just turns?

2. Will the centre nut rotation screw the tensioner bearings up?

Best wishes, Frank B

Mike Noc · 14th July 2020, 13:36

I've had the same problem Frank, and tightened the bolt up that holds the bearing in place. It is a left handed thread and you need to get an open ended spanner on the nut behind the bearing.
Once the belt was off I backed the nut off and put a few drops of Loctite behind it before retightening to help prevent it happening again.

frankgoldstar · 14th July 2020, 15:23

Quote:

Originally Posted by Mike Noc

I've had the same problem Frank, and tightened the bolt up that holds the bearing in place. It is a left handed thread and you need to get an open ended spanner on the nut behind the bearing.
Once the belt was off I backed the nut off and put a few drops of Loctite behind it before retightening to help prevent it happening again.

Dear Mike, many thanks for the information. Seems a NAUGHTY WORD-NAUGHTY WORD-NAUGHTY WORD-NAUGHTY WORD-NAUGHTY WORD-NAUGHTY WORD- stupid way of doing things, but hey ho, it is what it is.

Lord knows how I will get a spanner on the back, but you have told me it can be done, which is an enormous help. A lot more help than Haynes too!

Best wishes, Frank B

macafee2 · 14th July 2020, 16:12

it can indeed be done, mike told me how to do mine as I had the same problem.
You may need to grind down the spanner that goes next to the engine block as there is little in the way of space

macafee2

14th July 2020, 11:54	#1
frankgoldstar Avid contributor Rover 75 Conny Saloon Join Date: Sep 2009 Location: Manchester Posts: 144 Thanks: 16 Thanked 25 Times in 16 Posts	CDTI Aux belt tensioner will not move My crank pulley went, so I prepared to change it. I have the right pulley, having done this on my previous 75's. However, the aux belt tensioner will not release. The centre 24mm nut rotates, but the arm does not move. I have done this job before, hence me having the spanner to get on the 24mm nut, but while it has not been easy, it has not been impossible before now. So two questions for those experts who have taken the tensioner off in the past. 1. How do I take tension off when the centre nut just turns? 2. Will the centre nut rotation screw the tensioner bearings up? Best wishes, Frank B

14th July 2020, 13:36	#2
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	I've had the same problem Frank, and tightened the bolt up that holds the bearing in place. It is a left handed thread and you need to get an open ended spanner on the nut behind the bearing. Once the belt was off I backed the nut off and put a few drops of Loctite behind it before retightening to help prevent it happening again.

14th July 2020, 16:12	#4
macafee2 This is my second home Rover 75 Saloon & Tourer Join Date: Sep 2012 Location: Lincoln Posts: 14,912 Thanks: 1,630 Thanked 3,032 Times in 2,181 Posts	it can indeed be done, mike told me how to do mine as I had the same problem. You may need to grind down the spanner that goes next to the engine block as there is little in the way of space macafee2