V-6 with third pulley.

[dmarx]

OK folks, what is the third pulley on the front of this engine? Is it an alternator mounting bracket, or perhaps an idler pulley?
Dan
dlmarx@bellsouth.net

 

[b4black]

Hard to say without knowing where the alternator will be. If there won't be alternator on the front, then I would say it's a tensioner pulley since the crank pull and water pump pulley are not adjustable.

 

[WarWagon]

It's a tension pulley for sure, But from what? I'm 100% that's not a GM part, I'd bet it was sourced or fabbed up when that engine is swapped into a different chassis. That part would never be used on any OEM setup especially with v belts, if it was a serpentine belt pulley... well that that's a different story.

 

[charlief1]

It's a tension pulley for sure, But from what? I'm 100% that's not a GM part, I'd bet it was sourced or fabbed up when that engine is swapped into a different chassis. That part would never be used on any OEM setup especially with v belts, if it was a serpentine belt pulley... well that that's a different story.

Yep, not a factory part. Looks like and aftermarket AC set up that was put on it.

 

[dmarx]

I emailed the owner and he doesn't remember what it is for. he has had the engine for 15 years. This engine is on ebay.
Dan

 

[mat231v6]

that engine is on ebay. i think its so you can use the toyota drives. not a factory part.

 

[FlintBuick4Life]

I wish they made a tension pulley... would have saved me an alt bracket

 

[dmarx]

It's a Downey Idler pulley

here it is. That alternator bracket is exactly what I have been looking for. Made for the 231 V-6

Downey Buick -> Toyota pickup goodies - Pirate4x4.Com Bulletin Board
Dan