Diesel engines (Q1) "Designed to be driven hard"

Oct 05, 2025 Last reply: 9 months ago 26 Replies

I had my fan belt snap on the M5. With the ignition warning light on and the temperature rising quickly I went straight to the hard shoulder. I cut off a length of windscreen washer tubing and made a temporary belt from it, and when I started the engine it slipped a bit but it did turn the alternator and water pump provided I kept the revs low - too fast and it slipped too much to be usable. With my temporary repair I could drive at 40mph in top, and I limped along to the next service station where the petrol bit sold me a replacement fan belt. I fitted it and completed my journey.

Petrol stations selling fan belts? That must have been a few years ago. ;-)

Tim

You were lucky: a) to find that they sold the correct belt for your car, and b) that you could fit it yourself with minimal/no tools.

When mine on my Peugeot 306 failed, it took my local garage two days to get hold of a new one and then fit it. And they failed to notice that one of the pulley flanges was bent - which is probably why the belt wore and then snapped in the first place.

I'd done about 5000 miles when the replacement belt snapped as I was about to set off back home on a Sunday night after staying the weekend at my girlfriend's house. So I had to return to her house and then arrange for the RAC to collect the car and take it to a genuine Peugeot garage to get it repaired *properly*. The garage replaced the bent pulley as well and gave me a report implicating it and blaming my village garage for not noticing. The response of that garage was "tough

- nothing to do with us, mate". So I stopped using them and stopped recommending them to anyone else.

About 40 years ago. And I was impressed that they had one the right size for my car which was 14 years old at the time.

It wouldn't happen nowadays.

I had tools. The car was 14 years old at the time. I carried a cantilever tool box containing all the tools I might possibly need in the boot at all times, plus a torch and a tyre pump.

My first car was an old Mk3 Cortina. It was a necessity to carry a full toolbox in the boot :)

didn't need to do that with my Mk IV - and I kept it for 13 years.

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