TechVillage said:

Hi,

I'm ordering a cam belt kit for my 2003 JTD. The Service book that came with the car advises every 5 years to change the timing belt, but I cannot see anything about the frequency of the auxiliary belt. What should it be?

Many thanks!

Rich

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BikeDoc said:

Last time I looked, the Cam/Timing Belt was completely enclosed by the Plastic covers, so nothing of any size could get in there.

Aux Belt is an 'on-condition' item really, it'll start to make squeaking/whining noises when it's on the way out, and will start to show signs of cracking on the ridges, most noticeable where it goes round the Tensioner Pulley (small diameter, Belt ridges on outside, so stretched, which will show up age cracking).

Might as well do it while you're doing the Cam Belt really, especially as you don't know how long it's been on there.

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creon said:

does the crankshaft pulley themselves cause problems on the jtd, on some models (hdi) these tend to need changing circa 70k because of damping on pulley giving in.

once had an aux belt shredding and wrapping itself round the crankshaft pulley making the timing jump breaking valves damaging the head.

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