Annoying Engine Squeak

[KevinL1212]

Hello fellow 4runner enthusiast. I have a 98 2.7L 4runner (218K miles) with a very annoying engine squeak that is driving me crazy. The noise happens when the engine is idling and gets worse when accessories (lights, ac) are on. I replaced the belts and that didn't help. I took all the belts off and the noise is still there. My next guess is the crank bearings. Can anyone please help me, I have had this car for over 10 years and it kills me to hear her crying.

 

[NCrunner2012]

Hello fellow 4runner enthusiast. I have a 98 2.7L 4runner (218K miles) with a very annoying engine squeak that is driving me crazy. The noise happens when the engine is idling and gets worse when accessories (lights, ac) are on. I replaced the belts and that didn't help. I took all the belts off and the noise is still there. My next guess is the crank bearings. Can anyone please help me, I have had this car for over 10 years and it kills me to hear her crying.

Kind of hard to diagnose without hearing, but could it be the harmonic balancer (crank pulley) going bad? I'v heard Honda's whining really bad and it ended up being the pulley was basically coming apart...worth a shot I guess.

 

[tre9er]

have you spun each pulley individually without belts to see if any are hard to spin, wobbling, or making noise?

 

[kball]

I don't know much about the 2.7 but if it still makes the noise with all the accessory belts off I'd guess it could be something with the timing chain. Maybe a guide wearing out.