1997 acura tl crankshaft spinning freely, is this normal? Just replaced a/c compressor and the pulley is turning real slow. Belt is not slipping. The crankshaft pulley and a/c pulley/belt rotate normally when a/c is not engaged. Once engaged, crankshaft pulley is slipping. Please help

With the belt off, put a wrench on each thing the belt turns. You should even be able to turn the crankshaft slowly, with some effort. Check for play or excessive resistance on the pulleys. An idler or tensioner pulley should spin freely, not wobble, and make very little noise when spinning, like a fidgit spinner, or a scateboard wheel. Some effort will be needed for an AC compressor, less for the alternator, but as long as you don't hear metal to metal scraping, you should be fine.

It is turned by (usually) the main serpentine belt. When the AC is not in use the clutch spins freely. When the AC "kicks" in what is really happening is the clutch in the compressor is locking up and the belt makes the pulley turn, compressing the freon.

Yes as long as the a/c pulley spins freely. You should be able to spin all pulleys by hand, except for crank pulley

Most likely you have a seized AC compressor. When you ask for AC or heat the AC clutch engages with the pulley wheel that normally spins freely when the AC is off. As the pulley wheel is no longer able to turn because of the seized compressor the belt will either slip or snap.

Possible thermostat but more likely fan belt is slipping when idling causing waterpump to slow or even stop spinning. Tighten or replace fan belt that runs over waterpump pulley

take the belt off and spin the pulleys, all of them. they should all spin freely except for the crankshaft of course. the alt and the the water pump and the idler and tensioner pulleys can all freeze up. ac compressor pulley too.

Crankshaft position sensor located on Right side of the engine. 1.remove the crankshaft pulley 2. remove the drive belt auto- tension 3. remove the upper cover and front covers from the engine 4. remove the crankshaft position sensor from the oil pump 5. Install tbe sensor in the reverse order of removal. Hope this can help .

It is the harmonic balancer, ie. pulley. It is a two piece--with rubber between the two. It will, especially if belt dressing or other lubricant has penetrated it, slip. I just ordered a new one online for $70. It is a fairly common problem.

The A/C pully is supposed to spin freely until the AC is activated to run.. The cranshaft pully does not. Replace the tensioner pully. The belt has to fit in between the grooves on the pullys.

The pulley's aren't supposed to spin freely with the belt on. The belt connects all the pully's to the crankshaft, which does not spin freely because it is attached to the pistons inside the engine. To turn the pulleys, you have to turn the crankshaft, which in turn moves the pistons inside the engine up and down.