Technical 1.9jtd multipla rattle

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Technical 1.9jtd multipla rattle

floodey

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help - when my car is just ticking over (multipla 1.9jtd) it has a rattle coming out of the engine bay, when a put a small amount of revs in it goes away. A friend said it may be the tensioner on the belt thats either loose or on its way out, any ideas anyone. thanks
 
Timing belt tensioner is a good start, you should be able to locate the approximate location with the engine running and the bonnet up. Be careful around the drive belt, if it's on the other side of the engine possibly clutch thrust bearing or poss gearbox, a large screwdriver or any long metal implement which can be placed against the engine and to the ear is surprisingly good at locating sounds.
 
Hi Floodey

From experience with a Pug HDI engine, I had exactly the same problem as you, a rattle that stopped as soon as you accelerated slightly. I found this was the auxillary drive belt pulley, that runs directly off the engine (cam?) This pulley has an outer metal casting that the pulley belt runs on, and also has an inner metal casting, that attaches to the camshaft. In the middle of these castings is rubber, which is used to stop the transmittal of vibrations from the engine to the auxillary drive belt/ system. Over time the rubber breaks down, and the two castings can knock against each other.

To confirm that it is this part that has gone, check around this pulley for signs of black/ grey dust on the face of it. If you have even a small amount of dust, then this is the fault. To confirm this fault, spray WD40 onto the pulley wheel while the engine is running, the knocking on mine stopped, but started again as soon as the WD40 evaporated/ dried off.

I hope that this helps you, I would recommend the purchase of a torque wrench to ensure the correct tightness of the new pulley. Also you will need an assistant, as you need to put the car in gear and have someone apply the brakes in order that you can undo and redo the nut. The part for my pug was £40, although depending upon source and fitment, this will probably vary considerably.

Best of luck

JamesAtthews
 
i had this on my 110sx jtd and it was a loose air box the other rattles i had was a mount tapping away because it was shot and a loose manifold rattles like mad and is hard to pin point
 
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