Auxiliary belts

Jontypilk · 9th September 2015, 13:26

How often should the alternator and air compressor belts be changed on a CDTi?

EastPete · 9th September 2015, 13:27

I think it is every 90,000 miles or 6 years, whichever is sooner

Pete

Mike Noc · 9th September 2015, 22:25

Yep that was in the earlier service schedule. The later schedule had them down for inspection only, but I change them every 90k miles.

Frank Incensed · 9th September 2015, 23:07

Quote:

Originally Posted by Mike Noc

Yep that was in the earlier service schedule. The later schedule had them down for inspection only, but I change them every 90k miles.

Cynical as I am, this is probably because the other components in the chain (ancillary belt pulley, alternator etc) often require attention or replacement at a not-much-higher mileage.

The manufacturer telling you that the belt should be replaced, only for you to have the pulley collapse, or something driven by the belt to go wrong shortly afterwards, wouldn't fill you with confidence in the skill of your mechanic. To tell you to replace everything.......what would you think then?

NB I've heard of means, modes and medians and there are always "exceptions to the rule". I am also aware that some diesels have attained stellar mileages, without their owners even having to change a spark plug!

And I believe them.

trikey · 9th September 2015, 23:10

I changed my belts on the diesel about 30k ago using oem belts, a check yesterday suggests that new ones are in order, no cracking but what looks like bad wear marks are starting to show.

Ignore the rules, get the bonnet up and have a check!

Mike Noc · 9th September 2015, 23:26

Quote:

Originally Posted by Frank Incensed

Cynical as I am, this is probably because the other components in the chain (ancillary belt pulley, alternator etc) often require attention or replacement at a not-much-higher mileage.

The manufacturer telling you that the belt should be replaced, only for you to have the pulley collapse, or something driven by the belt to go wrong shortly afterwards, wouldn't fill you with confidence in the skill of your mechanic. To tell you to replace everything.......what would you think then?

Good point, although I've found my diesel pretty good on ancillaries - original water pump lasted nearly 300k miles (Circoli replacement failed at 60k.

)

The idler pulley felt a bit rough at 350k miles so was swapped, and everything else the belts go round is original and running fine at 370k miles.

And despite all the horror stories that are posted up, the crank pulley hasn't fallen apart, or even started to rattle yet, and when it does I've had my money's worth.

.

Arctic · 10th September 2015, 00:01

Quote:

Originally Posted by Mike Noc

Yep that was in the earlier service schedule. The later schedule had them down for inspection only, but I change them every 90k miles.

Hi Mike
That means you have changed your belt more times than most on here, four times if I am correct

and still on the same pulley

got to be a record

Mike Noc · 10th September 2015, 07:37

Spot on Steve - I have changed the belt 4 times. Although I have driven the car from new it was a company car for the first 118,000 miles, so the first change was carried out by a main dealer.

Unfortunately I unknowingly bought a cheap Chinese serpentine belt, which started to delaminate after about 2 weeks and had to be replaced.

[IMG]

[/IMG]

As Andy says - worth getting the bonnet up and having a check every now and again, and especially after doing work or having work done.

Clickernick · 13th September 2015, 07:32

Just picked up the two belts required for a ctdi from a member.
What's the basics to change these as I would like to get it done before the cold comes.
Could I also have pointers as to what else to think about changing whilst doing these belts, I.e pulleys, tensioners etc
Car has 141000 on clock.

Phil-T4 · 13th September 2015, 08:06

Its not too bad, when your ready i have the proper tool which you can borrow.

9th September 2015, 13:26	#1
Jontypilk Regular poster Rover 75 Saloon Join Date: Oct 2012 Location: Welwyn Garden City Posts: 50 Thanks: 27 Thanked 4 Times in 4 Posts	Auxiliary belts How often should the alternator and air compressor belts be changed on a CDTi?

9th September 2015, 23:10	#5
trikey Premium Trader Rover 75 Join Date: Nov 2010 Location: Devon Posts: 33,767 Thanks: 8,837 Thanked 14,831 Times in 8,030 Posts	I changed my belts on the diesel about 30k ago using oem belts, a check yesterday suggests that new ones are in order, no cracking but what looks like bad wear marks are starting to show. Ignore the rules, get the bonnet up and have a check! __________________ Lest we forget..

10th September 2015, 07:37	#8
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: 11,548 Thanks: 3,470 Thanked 3,119 Times in 2,247 Posts	Spot on Steve - I have changed the belt 4 times. Although I have driven the car from new it was a company car for the first 118,000 miles, so the first change was carried out by a main dealer. Unfortunately I unknowingly bought a cheap Chinese serpentine belt, which started to delaminate after about 2 weeks and had to be replaced. [IMG][/IMG] As Andy says - worth getting the bonnet up and having a check every now and again, and especially after doing work or having work done.

13th September 2015, 07:32	#9
Clickernick Posted a thing or two Rover 75 Connie SE Tourer Triumph Street Triple R Join Date: Aug 2009 Location: Bletchley, Milton Keynes Posts: 1,163 Thanks: 75 Thanked 91 Times in 65 Posts	Just picked up the two belts required for a ctdi from a member. What's the basics to change these as I would like to get it done before the cold comes. Could I also have pointers as to what else to think about changing whilst doing these belts, I.e pulleys, tensioners etc Car has 141000 on clock. __________________ Real walnut interior. Original refurbished Forked Spokes 16” with Michelin Primacy 4 rubber, Pioneer AVH-Z9200DAB double din Wi Fi phone integration. Retrofitted twin front horns. 160 re-map. Revotec fan. Silicone intercooler hoses and ‘O ring’ replacement. Top hose thermostat. New walnut and smokestone steering wheel with cruise upgrade. Brembo Brakes. Ceramic coated rear Exhaust. L/engine mount, Hydramount, Bosch MAF. Focal Access Drivers and Focal Amp.

9th September 2015, 13:27	#2
EastPete Posted a thing or two Rover 75 CDTi Classic saloon, MGB GT, Skoda Yeti Join Date: Aug 2008 Location: Ramsey, Cambs Posts: 1,874 Thanks: 626 Thanked 635 Times in 430 Posts	I think it is every 90,000 miles or 6 years, whichever is sooner Pete

9th September 2015, 22:25	#3
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: 11,548 Thanks: 3,470 Thanked 3,119 Times in 2,247 Posts	Yep that was in the earlier service schedule. The later schedule had them down for inspection only, but I change them every 90k miles.

13th September 2015, 08:06	#10
Phil-T4 I really should get out more....... MG ZT-T, Rover 75 Tourer Join Date: Mar 2011 Location: Olney Posts: 2,969 Thanks: 245 Thanked 1,088 Times in 657 Posts	Its not too bad, when your ready i have the proper tool which you can borrow.