Cdti Aux Belt slap

Shapfell · 13th August 2021, 20:20

I'm running out of ideas so I thought I'd lob this to the hive mind on here. My ZTT had the crank pulley dismantle itself, so I bought a reputable one and after having to get a mega-powerful rattler to remove it (thanks Trikey!), I changed it over. Then it fell off. So after checking everything over again, it was refitted and tightened up to effin tight and marked for movement.

Since this was done, the 'pull' side of the drive belt (from the alternator) slaps around madly at idle. So far, I have changed the water pump (last year), idler, tensioner (pulley and tensioner unit), alternator (after it literally blew up on me) and belt. The only bit left is the PS pump but that has no play and the bearings sound good.
Why would the 'pull' side of the belt do this? Ive even had a DTI on the crank pulley and it is concentric (just in case). at a loss now. any ideas??

PS; I found using a cheap ratchet strap through the end ring of a 24mm combo spanner, then around the engine mount works better than amputating bits of hand regularly for the tensioner....

13th August 2021, 20:20	#1
Shapfell Loves to post Rover 75 Conn SE saloon / MG ZTT cdti auto Join Date: Jul 2011 Location: Lowestoft Posts: 497 Thanks: 10 Thanked 33 Times in 26 Posts	Cdti Aux Belt slap I'm running out of ideas so I thought I'd lob this to the hive mind on here. My ZTT had the crank pulley dismantle itself, so I bought a reputable one and after having to get a mega-powerful rattler to remove it (thanks Trikey!), I changed it over. Then it fell off. So after checking everything over again, it was refitted and tightened up to effin tight and marked for movement. Since this was done, the 'pull' side of the drive belt (from the alternator) slaps around madly at idle. So far, I have changed the water pump (last year), idler, tensioner (pulley and tensioner unit), alternator (after it literally blew up on me) and belt. The only bit left is the PS pump but that has no play and the bearings sound good. Why would the 'pull' side of the belt do this? Ive even had a DTI on the crank pulley and it is concentric (just in case). at a loss now. any ideas?? PS; I found using a cheap ratchet strap through the end ring of a 24mm combo spanner, then around the engine mount works better than amputating bits of hand regularly for the tensioner.... __________________ Oh well, it's only money...... 2004 Conn SE 1.8 Work so far:- Gerry T, Rad Fan Resistor, Handbrake Compensator, Bonnet Catch Block, Leather Handbrake gaiter, Journey Camera, Sean's DD Unit with Freeview!, Towbar, Rear Sunblind, Smiley!, Headlamp Protectors, Alloy Intake, R75 Brolly, Puddle lights, reversing camera. 2004 Connie CDTi Tourer; replacement for the ZTT. Last edited by Shapfell; 13th August 2021 at 20:25..