MR2 Roadster Owners Club

The Workshop => Maintenance, Problems & Troubleshooting => Topic started by: Whisperhead on January 22, 2026, 13:39

Title: Crankshaft Pulley
Post by: Whisperhead on January 22, 2026, 13:39
So... My crankshaft pulley flew off. Bolt is MIA. It's at the garage now, on the ramp - I'm gonna need crank pulley, crank bolt and crank seal... On top of the belt, tensioner etc etc.

Can anyone here give some recommendations? I've heard rumours that lightweight crank pulleys aren't suitable as they also act as  a harmonic balancer?

Shoukd I bother with used parts here or is new the way to go (for bolt and pulley of course)?

Is the timing going to have been affected?
Kinda out fo my depth, hence it's in the garage for the repair.

Thank you for any and all advice!

Title: Re: Crankshaft Pulley
Post by: Carolyn on January 22, 2026, 14:49
Quote from: Whisperhead on January 22, 2026, 13:39So... My crankshaft pulley flew off. Bolt is MIA. It's at the garage now, on the ramp - I'm gonna need crank pulley, crank bolt and crank seal... On top of the belt, tensioner etc etc.

Can anyone here give some recommendations? I've heard rumours that lightweight crank pulleys aren't suitable as they also act as  a harmonic balancer?

Shoukd I bother with used parts here or is new the way to go (for bolt and pulley of course)?

Is the timing going to have been affected?
Kinda out fo my depth, hence it's in the garage for the repair.

Thank you for any and all advice!



I can send you a bolt.  A used puuley should be ok, but they do have a rubber 'sandwich' construction and they can go wobbly.  I spotted that mine was out of true just in time to prevent mayhem.  I sourced a used one and it's been fine for several years.

I should think you can get the pulley, tensioner, idler pulley and bolt as a set from one of our breakers.  I'd ask them to send all the bolts that go with the parts you are getting.

The seal will have to be new.
https://www.ebay.co.uk/itm/236552970897?var=0&mkevt=1&mkcid=1&mkrid=710-53481-19255-0&campid=5338268676&toolid=10044&ff=11&gbraid=0AAAAADA7Q_I-5pau44uSKno8Os-4BhZ8H&loc_physical_ms=1007037&adtype=pla&customid=CjwKCAiAssfLBhBDEiwAcLpwfuAAg9ezvyuxRBr-aMa25uAwNq-2kmTB8a4TnveLYPRNwP1m-FqGZxoC6XMQAvD_BwE&gclid=CjwKCAiAssfLBhBDEiwAcLpwfuAAg9ezvyuxRBr-aMa25uAwNq-2kmTB8a4TnveLYPRNwP1m-FqGZxoC6XMQAvD_BwE (https://www.ebay.co.uk/itm/236552970897?var=0&mkevt=1&mkcid=1&mkrid=710-53481-19255-0&campid=5338268676&toolid=10044&ff=11&gbraid=0AAAAADA7Q_I-5pau44uSKno8Os-4BhZ8H&loc_physical_ms=1007037&adtype=pla&customid=CjwKCAiAssfLBhBDEiwAcLpwfuAAg9ezvyuxRBr-aMa25uAwNq-2kmTB8a4TnveLYPRNwP1m-FqGZxoC6XMQAvD_BwE&gclid=CjwKCAiAssfLBhBDEiwAcLpwfuAAg9ezvyuxRBr-aMa25uAwNq-2kmTB8a4TnveLYPRNwP1m-FqGZxoC6XMQAvD_BwE)

How's the water pump and alternator?

None of this affects the timing.

Title: Re: Crankshaft Pulley
Post by: Whisperhead on January 28, 2026, 09:27
Thanks Carolyn - I'll get in those. They've also told me the Crank Key (95161-30416) is missing so now searching for that... I'll update once I know more.

Managed to grab a bolt on ebay in  a panic but thank you for the offer there, was only 8 quid new.