Can i tighten the crank shaft pully on a 99 chevy lumina

You may want to have a reputable mechanic take a look at this - simply whacking it with a hammer could likely cause other significant problems. You definitely don't want the nose of your crank beat up.

on the harmonic balancer =lower crank shaft pully,look all around it its there

The Harmonic balancer is held on to the front of the crank shaft with a bolt. there are pullys pressed onto the harmonic balancer in rubber.If more pulleys are needed for more accessories they are bolted to the harmonic balancer.

Its the harmonic balancer. The rubber in the balancer has disintegrated and not balancing the motor any longer. You have to install a new one.

The crankshaft sensor is located lower rear of engine right above transmission

The Crank shift sensor is located in front of the motor in between the intake manifold and oil filter housing, nest to the knock sensor. Look on side cylinder block beside starter.you have to remove the starter to remove the crankshaft sensor. Hope this helps. Thanks for choosing Fixya, RJ

the crankshaft postion sensor is always located either under the harmonic balancer pully aka crankshaft pully or mounted right outside the pully if yoiu need to change it keep in mind that you will need to to own or rent a harmonic balancer pully puller and a harmonic balancer pully installer kit both you can rent both at autozone fairly cheap and get all your money back when your done
job rating from 1-10 about a 3


hope it helps if so could you please leave me a 4 thumbs up feedback thank

Hi, in both engines the crank sensor is at the back of the engine by the transmission. The sensor is #10 in the diagram below and looks like the picture included.


4-cylinder crank sensor:


6-cylinder crank sensor:

the oil pan will need to be removed to repalce the rear seal, so replace the front seal and gasket then, replace the timing chain/gears if sloppy, then reinstall the oil pan.

hi, if this is the case on your vehicle, you need to get it to a shop to have inspected sooner than later. if this problem is the crankshft pulley out further than the rest of the pulleys, the harmonic balancer is coming apart most likely. if this does occur, it may spin off at very high rpms and tear up whatever gets in it's path insode the engine compartment. could be very costly. side note: i once saw a harmonic balancer come apart on a 9 second drag racing car and it ripped through the passenger seat area and went out the back window, not at all likely to happen to your van, since you're not reving at 7000 plus RPM's, but just an idea.