The reason is that you're not CHANGING the pulley. The pump comes without one so you are removing it from the old and replacing it on the new pump. remember to put those bolts in first

 

I understand what you are saying Jack but, my question was directed towards those that replace the pump and install a new pulley rather than reuse the old one.

Hence, a pulley is a pulley unless it's damaged. As action4478 indicated if the pulley has been R&R'd numerous times creating a loose, pressed fit then that is a damaged pulley. jmho

Rog

 

I love this forum, thanks for the good info. I took my truck to a dealer and they gave me a price of almost 500.00 to replace this vacuum pump, thank goodness my son's are mechanical enough to do it for me. After market pump from KOI for seventy something, big difference!

 

First of all WELCOME to the forum. You woke up an old thread, but is fine to hear that it helps you.

 

And not one mention of checking the lube in the pump?????? Seen 3 from NAPA that came completely dry...... ymmv.......

 

What lube? How do you check it? (Am I being punked?) I just changed mine...

 

Allen head screw, remove, put in good oil (I use synthetic) put screw back in.

 

Can I do this while the pump is installed?

Thanks!!

 

I dont see any Allen head screw in the pics of the link I posted (post #9)

 

Where on the pump is the screw located? Also, what sort of oil would I use. Engine oil?