Engine start

[xrtim]

Removed the drive belt which only runs the alternator, checked for any obstruction again for the crank pulley, alternator pulley and Belt, found nothing, alternator turns smooth, dry sump pulleys and belts no obstructions, will run the water pump tonight (electric) and check for noise and then restart and check with stethoscope, still got a sneaky feeling it’s a spring problem

[xrtim]

I have 2 belts fitted at the moment, the main belt only drives the alternator via a shorter belt, the only thing that could make that noise is the alternator itself or something close touching, the alternator is smooth and no obstructions anywhere near. The second belt from the crank pulley is driving the dry sump pump so can only run engine with the alternator belt removed and I figured after rechecking the alternator and belt that the noise cant be coming from there. Will run the water pump with the laptop tonight and then start engine and check with stethoscope.
Thank for the advise will let you know what I find

[xrtim]

Boosted you were right, Brother in law came round to give me a hand with his stethoscope. Noise was not from top end so belt removed and no noise, turns out it was the belt slapping on the crank pulley. Belt tightened as far as I dare and no noise, can't believe that the belt could make that noise with the tension that was on it originally. Even better a problem solved without costing me money.
Thanks to all

[xrtim]

its a special pulley designed to run off the ATI damper for dry sump applications

[xrtim]

I was wondering what you are talking about until I looked at the picture more closely, the pulley to the left is actually the dry sump pump pulley and it is underneath the alternator. It does look like it is on the alternator pulley though.
Tim

[xrtim]