97 ranger squeal

[odogf150]

hey everyone i need some help on a little problem of mine, i got a 97 ranger 4.0 with a 5 speed overdrive and on start up there is a loud and very annoying squeal that lasts for a minute or less or more then fades away i notice the other day after cleaning the engine compartment, i unplugged the large harness from the alternator and started it up and no squeal and remembered, plugged it back in and bang the squeal came right back. engine was running for maybe 5 minutes

 

[kiwi f150]

hey everyone i need some help on a little problem of mine, i got a 97 ranger 4.0 with a 5 speed overdrive and on start up there is a loud and very annoying squeal that lasts for a minute or less or more then fades away i notice the other day after cleaning the engine compartment, i unplugged the large harness from the alternator and started it up and no squeal and remembered, plugged it back in and bang the squeal came right back. engine was running for maybe 5 minutes

Try tightening the fan belt.

Cheers Mark

 

[john112deere]

Pretty sure that truck's got a serpentine belt with automatic tensioner...I know my '97 with the 4-cyl does.

Is the belt in good condition, or is it glazed and cracked?

Unless the belt is brand-new, I'd probably replace it and then if the old one still looks decent, toss it behind the seat as a spare. Make sure the tensioner seems to move OK while you're changing the belt, and if it doesn't replace that, too.

 

[78F250SCCS]

My 95 with a 3.0 did the same thing. On mine it was the air compressor for the air conditioning. Not sure if the 4.0 and 3.0 have the same compressor, but mine would engage and then seize. I just unplugged the wiring harness.

 

[odogf150]

yea im sure i replaced the belt a few months back idk got to double check oh yeah, the a/c seized up a while back also so im dealing with that also

 

[jdk]

my dads 97, 3.0 did that. he replaced the idler and the tentioner and it went away, no a/c on his