AMC Eagle Den Forum

The Mighty 258 => The Engine => Topic started by: drock87 on March 23, 2017, 11:09:12 AM

Title: Engine whine
Post by: drock87 on March 23, 2017, 11:09:12 AM
So lately, my car has been making a "whine" sound from the engine. It is louder when cold, but never completely goes away. I am paranoid it is a bearing spun somewhere, but there is no knocking or any of that sort. I did advance my timing recently, but I haven't experienced any pinging that I am aware of. Thoughts???
Title: Re: Engine whine
Post by: vangremlin on March 23, 2017, 04:22:03 PM
Does the whine vary with RPM?  I've got a whine in my engine, I'm pretty certain it is a vacuum leak that I haven't been able to track down yet. 
Title: Re: Engine whine
Post by: drock87 on March 23, 2017, 05:19:26 PM
It does. My big fear is that its a bearing somewhere only because its a similar sound to my 500SL that turned out to be a spun bearing in the transmission oil pump. That was costly...but then again, its a 500SL.
Title: Re: Engine whine
Post by: AMC of Houston on March 23, 2017, 06:10:12 PM
Lots of things on the front of the engine that can whine.  Water pump, idler bearings A/C clutch bearing, alternator bearing, P/S pump, etc.   Get a mechanics stethoscope (or use a long screwdriver as one) and try to see exactly what is whining (without getting the screwdriver caught up in anything spinning!!).
Title: Re: Engine whine
Post by: eaglefreek on March 23, 2017, 07:54:01 PM
Pull all your belts off and run the engine to rule out any of the accessories or pulleys.