My g/f's Tacoma has a squeal at startup and high RPM's. She has a '95 and I have a '97 4Runner, but we both have the same engine, the 2.7 4cyl.

I have found the squeal to be the belt that runs the alternator. Hers is pretty darn loose, where mine is tight against the accessories. On her truck, There is a wing nut that controls how far away the alternator is to the engine, thus controlling the tightness of the belt. The question is, it this long nut the only thing I need to turn? I tried to tighten the nut, but is very rusty and doesn't like to move.

There is a special bolt beneath the long wingnut, but I don't seem to have the proper size attachment for it. How do you tighten this belt? Does this special sized bolt control how the longer wingnut loosens or tightens? If so, how do you loosen it? It is between mm sizes!

Thanks for any replies!

Installation is reverse of removal

Generator (it's called in FSM)

Get some PB Blaster from NAPA for that bolt, put some antiseize on it once you get it loose.

Thanks for the link, that is exactly what I need.

Alright, so I get the adjusting bolt.
Now the lock bolt...What would you use for that? Do you know what size that might be? When I tried with my metric set, I had nothing that fit.

Hi Guys! Thank you so much for the diagram. We fixed the belt within a few minutes... it had been soaking in pb blast since we first looked at it last week.
We used an adjustable wrench to loosen the locking bolt because it is in-between metric sizes 11 and 12mm.
I am a happy girl.
Squeak you later!
-the g/f <img src="/forums/images/graemlins/smile.gif" alt="" />

Cool. Got me curious now; I just bought a 99 with a 2.7. Probably an SAE size for the locknut.