Turbo Whine-Like Sound
07-13-2013, 12:16 AM
#1
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Year: 1990
Model: Cherokee (XJ)
Engine: Renix 4.0
Turbo Whine-Like Sound
So I got a 1990 Laredo a week ago and at high RPMs (3500+). I think it sounds cool but is there anything that could be wrong to make that sound?
07-13-2013, 10:17 AM
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Year: 1991
Model: Cherokee
Engine: 4.0 I-6
I did the ZJ fan clutch upgrade a while back and mine sounds kind of like a turbo now at higher RPM's. A lot of folks on here said it would sound that way but mine isn't too loud...and I know that it's working right.
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07-13-2013, 11:59 AM
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Year: 1990
Model: Cherokee (XJ)
Engine: Renix 4.0
Originally Posted by JeepingDan
Have you opened the hood and taken a peek at anything?
07-13-2013, 12:12 PM
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Year: 1998 and 1988
Model: Cherokee
Engine: 4.7
When in doubt, Remove the fan belt and rotate every pulley by hand. one should feel wrong. if you don't find anything, You can even start it for a min or so (if its cold) and listen if the sound is coming from the back of the engine.
most unlikely but possibly, I rebuild my 88 engine and put it in a 98 with the fan belt routing of the 98.
I had this weird winding noise as well and couldn't find anything wrong then noticed that the belt was rubbing against a piece of the timing chain cover (didn't know they where different from year to year). Fortunately, there was about 1/2 " of material I could just file off and solve the problem.
The reason it was making that sound is because I have the type of belt that has little squares on the pulley side, not just the single grooves.
most unlikely but possibly, I rebuild my 88 engine and put it in a 98 with the fan belt routing of the 98.
I had this weird winding noise as well and couldn't find anything wrong then noticed that the belt was rubbing against a piece of the timing chain cover (didn't know they where different from year to year). Fortunately, there was about 1/2 " of material I could just file off and solve the problem.
The reason it was making that sound is because I have the type of belt that has little squares on the pulley side, not just the single grooves.