I've just recently, and proudly bought my 3rd Toyota . It needs a few things done before its ready for the road but I stumbled accross a leak last night. Its coming from the driver side of the Block (3.0L V6). It is a small cylinder approx. 2 or 3 inches in diameter with a bolt in the middle of it and a hose from it headed toward the front of the vehicle. It looks like it would be an oil filter for a motorcycle however obviously it isn't. Does anybody know what this thing is so that I can order a gasket/ "O" ring for it. I can attempt to get a picture of it if anyone needs. For now I'll post a picture of a K&N motorbike oil filter. (This thing that is leaking looks very similar to one of these.)
Thanks a bunch!

 

That would be the oil cooler. It might the the seal on the bolt. Here is the part number Toyota Part: WASHER, SEAL Part NO.: 90210-22001

 

I thought it may be for an oil cooler but thanks a bunch! Any idea what I would call a seal kit for that if I wasn't to use part #'s? Just oil cooler adapter? or is there a name for it?

 

Try just tightening the bolt first, it worked for mine

 

I don't think there is a kit

 

There are 3 seals (o-rings) for that oil cooler in total.

 

15785-35010 Gasket $1.00 90301-61003 O-Ring $5.00 90210-22001 Washer $4.00

 

lucky you to only have an oil cooler leaking, i just bought me a 92 runner aswell beleiving it had just a leaking front crank seal which I fixed and the found another leak, long story short, my heads are off at the moment, its been a fun experience one that I hope I dont have to go through again soon