UK Car Repair: Car Servicing issues, dual mass flywheel, clutch replacement

Question
Hi - Please Help as we have a major problem. We had our Rav 4 diesel serviced (60000) with Timing belt/Cam belt changed as per Toyota servicing schedule. We reported a fault with the car soon after we picked it up and the car was returned for the fault to be identified and fixed. it transpired that the Cam belt etc was not secured correctly and this is recorded on the job card. Less than 7000 miles later we take it into the garage for its 70000 service and told them that the car was vibrating. They have diagnosed that we would require a Dual Mass Flywheel and clutch and plus a strip of the gearbox is needed. i believe that this has resulted due to the lack of securing the Cam belt etc at the last service and we have been quoted £2500 to get fixed. we took out extended warranty on the purchase of the car and the 60000 service was completed without any issues whatsoever. Any advice would be greatly appreciated as we are not that 'mechanical' and many thanks

Answer
The clutch/flywheel and cam-belt are COMPLETELY separate.


First things first, are there any symptoms from the clutch/gearbox?
Is the clutch slipping?
Is there a rattling noise either with the clutch engaged or released whilst in neutral with the engine ticking over?
----




Strip of the gearbox? - the gearbox needs overhauling? why... Is it jumping out of gear or hard to engage gears? any noise or whining while driving, getting worse with load? Any jerking during acceleration?

If there's none of these symptoms I'd leave the clutch and gearbox alone.

This is a Toyota, the gearbox is known to be pretty much indestructible, with it being a light-weight vehicle the clutch can last well past 100,000 miles if driven expertly and most go for 85k without needing clutch replacement.

--

If they failed to properly install a cam-belt (2 or 3 things can go wrong with that...) then I wouldn't trust them to recondition a gearbox  (hundreds of components, assembled with tolerances around a thousandth of an inch......) let alone a clutch.. that's just my experienced opinion. In pure logic there's about a 1 in 3,000,000 chance of them getting it right given their previous performance.