vacuum pump - oil pump drive or serp belt???

[Mikey von]

vacuum pump - oil pump drive or serp belt???

I have either option open to me. What is the best way to run???

 

[MaxPF]

If you're running a serp belt system anyway I say run the serp driven vacuum pump. The serp setup needs an idler in that position anyway...

 

[bavarian_blazer]

Hey Max,

interesting thread! does the p400/optimizer still have the gear drive for the vacuum pump or did the just leave it out in the new castings?

Greetings

Flo

 

[MaxPF]

Hey Max,

interesting thread! does the p400/optimizer still have the gear drive for the vacuum pump or did the just leave it out in the new castings?

Greetings

Flo

It's still there. Those engines use a flush mounted unit that holds the oil pump drive gear. It can be pulled out and replaced with a vacuum pump/oil pump drive assembly though.

 

[Wrench]

Actually you don't need an idler in the vac. pump position. If you get a stock belt from a '93 one ton (no vacuum at all) it will fit perfectly and you can just leave the pump out. That's assuming you're using the serp brackets that mount the A/C on the pass. side, I'm not sure if that's true of the newer models.

 

[Mikey von]

Actually you don't need an idler in the vac. pump position. If you get a stock belt from a '93 one ton (no vacuum at all) it will fit perfectly and you can just leave the pump out. That's assuming you're using the serp brackets that mount the A/C on the pass. side, I'm not sure if that's true of the newer models.

good to know. I think I will run the belt driven vac. pump.