Engine start

[Boosted LS1]

Good stuff Tim. Hope it all goes as predicted now. :-)

[dandare]

Is that ok running another belt from the alternator spindle? It looks like it would create high axial loads on the spindle.

[xrtim]

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

[Storer]

xrtim said:

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

Glad you have found the cause but I really don’t like the look of that second pully on the alternator. I guarantee it will cause bearing failure in the alternator. Just a matter of time.

[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]

[Storer]