tj90

OK guys - I need your help. I just got done with my timing / balance belt and water pump change on an 84 engine with eccentrics. Got the car started and I was so proud that the engine was idling relatively smooth. I come inside and my wife says, "what is that whine?".

I swear I didnt hear it, but after my wifes comment I think I have the dreaded whine. I took a short video. Can you guys watch it and give me some ideas to proceed? I think the whine is accentuated on the video and it doesnt sound that bad IMO.


I read that whine is due to incorrect belt tension. I adjusted the timing belt to 90 degree bend and balance belt to 180 degree bend. I just read on Clark that the timing belt should be tensioned CCW. I think I tensioned the belt CW. I All belts and smooth pulleys are brand new and the car is on the jack stands.

I was thinking that I should drive it for 20-30 miles just to let the belt "seat" and clean off any assembly oils etc. I used a stethoscope and noise seems very loud around the cam. I checked the CAM toward the back of the engine and it was loud back there too...

I also noticed that the V-belt PS pulley at the crank was tight but wobbly as it rotated. I tried to capture that in the video. I guess that wasnt put on properly. Is that keyed? I dont remember a stud or keyway.

Jfrahm

Dreaded whine? It's usually a slightly too tight balance belt and trivial to sort out. Not dreaded at all.

joes

It's pretty normal for the balance shaft to whine when you get a new one put on. if you didn't get it over tight it will quiet down quickly.

AZ520

Take the balance belt off and you will still get the noise because its the timing belt on this one is rubbing the guard. You will see.

tj90

Update - I went back and checked belt tension and found that I tightened both eccentric pulleys on cam and balance the wrong way. This caused the belts to have more servere bend. There is much less noise now. Thanks for help everyone.