Screaching Noise

[BoBa524]

Ever since i got my car back from the mechanic (timing chains replacement) it screaches loud as hell on start up. Everyone says its the pulleys and i got some "engine dressing" at autozone (recomended by the salesperson), its a spraying lube can. it doesnt help any tips?1996 240SX174K MilesBase

[Altiman94]

Where does it sound like it's coming from? Try tightening your belts.

[DAEDALUS]

If the belts are not tight enough they'll squeal. If tightening them doesn't help then yes, you'll probably have to replace one or more pulleys. You can remove one belt at a time and just start the car to narrow down the right belt/pulley. Do it when the car's cold and don't run it for more than a few seconds each time. Don't want to overheat the car or kill the battery. Rotate the pulleys by hand with the belts off. Each should be smooth.