1993 Jeep Grand Cherokee Q&A
1993 Jeep Grand Cherokee Question: When I start my Jeep a chirping sound comes from the valve cover, what is it?
I say it is the drve belt (fan belt) have it checked, retensioned or replaced. That would sound like it's coming from the valve cover! Common problem. This belt does NOT have an auto. belt tensioner, it is manually adjusted and can become loose, thus the chirping, squealing noise you hear. The belt works it's hardest when the engine is cold!! After the engine runs a little/warms up, the ALTERNATOR has finished working harder to replenish the battery drain from having to crank the motor!!! Then everything just runs easier and belt becomes more pliable. That is why it does not do it after warm up! - pushrod
I agree with the two above but because the battery is drained when starting cold have it tested also, it may be starting to get weak. - Justin Case Auto
daycoproductsllc.com website has very good videos on diagnosing drive belt chirp and squeal, and they also have a free worn belt checker tool for free. - lightsaber
agree with #1 - globalhelper