Hello all,

Have a '00 4Runner SR5 with about 150K on it.

I've noticed for the last few months a high pitch squeal on start up. This happens in the morning (parked in the garage) and also when it is raining out. The squeal lasts about 2 or 3 seconds as I drive or get the rpms up and then doesn't happen again. Sometimes I will hear it very faintly when idling at a light but this situation only happens when it is raining.

Thanks for any thoughts or help!

 

loose belt? mine was squeaking when i was water fording last night. then today i tightened the alternator belt up and it stopped squeaking. your belts must be worn out

 

if tightening doesnt work try spraying some belt dressing around the pulleys that fixed the same problem on my bros 87 chevy

 

Thanks. I'll do some work on it on Friday and report back.

 

My alternator belt does the same thing. Some toothpaste rubbed on it is a quick fix, it gives it a little grit. Brake fluid works well too, it slightly dissolves the belt making it a little sticky.
This is only for when you are waiting for a new one, or when you are cheap like me

 

Belt Dressing doesn't last long. The only fix is to tighten them or to buy new ones. You are talking about $30 to replace all 3 belts. Best thing to do is to replace the belts. Should take you no more than 2 HRS.

 

x2 belt dressing doesn't last long. i'd tighten the alt first. before replacing all the belts.i had the same issue for like 4 months till i tightened the alt.