Wheel Nut Torque

Jan 25, 2026 Last reply: 5 months ago 45 Replies

Recent experience with crank pulley bolts (on a Ford Focus) would tend to indicate that you are probably better off using the recommended "special tool" (which is a torque multiplier) - otherwise the other "special tool" (which locks the flywheel in position) will snap off and leave some unhelpful bits of debris in the clutch casing.

The crank pulley bolt itself is some sort of "stretch bolt" and is discarded as a new bolt is supplied with the cam belt kit

Attacking the bolt with any kind of impact wrench is NOT recommended !

The crank pulley itself has some sort of magnetic hall effect sensor for crank positioning, but DOES NOT have a Woodruff key or anything to fix it in the correct radial position :-\

No problem. I only work on vintage cars so none of that modern nonsense applies. :) I would *not* attempt to lock the crankshaft, at least to begin with. I'd rely on its inertia for the wrench to work - and the 'give' of having it unlocked would prevent any nastiness in respect of sheered off bolt heads.

and vintage cars (very sensibly) dont get fitted with cam belts anyway :-\

This may be interesting:

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Only saw it today or I would have posted earlier.

Cambelts are the work of the devil!

One thing I detest about Ducatos - which are probably the most common base vehicle for motorhomes etc- is they use cambelts.

Fiat recommend you change them every 5 years or 100k. Few motorhomes do that kind of mileage - on the one we traded in in March, which was just over 6 years old, we’d done under 20k but I’d had the belt changed at 4 years due to the service cycle being every 2 years. Fiat charge - and I suggest you sit down- about £1100 to change the cambelt and water pump, which is recommended at the same time.

Conversely, Toyota use chains which should last the life of the car.

I’m a bit paranoid re Cambelts- I had one snap on an Orion 30 years or so back. I was lucky, no serious damage but it was the most expensive car repair I’ve ever had.

Fiat have a recall on some Ducatos for the incorrect cambelt but, fortunately, our new Ducato isn’t one of them.

As for wet belts…….

The Ford Focus which I dismantled has a wet belt, which is actually not too difficult to change - the real aggravation stems from the fact that the exhaust system is routed directly under the sump, so a lump of that, along with the cat and the turbo has to be removed before you get the sump off.

However, the reason for the sump removal is so that you can change the oil pump drive belt - which is also wet, and to clear the granulated bits of "caviar" out of the oil pump pickup filter

Obviously some of the studs on the turbo and the exhaust shear off during the process :-\

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