Vacuum pump replaced. Pics comparing old vs new design.

gone_fishing · December 3, 2018

I replaced my vacuum pump back in March and forgot I took pics comparing the old with the new.

I could hear a light ticking noise that I suspected was coming from the vacuum pump. I decided to proactively replace it in case it decided to self destruct and contaminate the oil. I didn't notice any difference in brake performance before/after so I assume the old was still functioning properly. Vacuum line going to booster looked clean. Replacing the pump wasn't as straight forward as I thought it would be. Getting to and removing the bolts that hold it on to the engine wasn't easy. Had to get creative with multiple universal joints. Went through about every swear word in the book and wrapped it up in a few hours.

In the side by side pics the new pump is on the right. In the close up pics the new pump isn't oily/dirty and has "WABCO" cast in the inside. The new pump is definitely a completely different design the old. New pump part number is ACDelco 12669488.

gone_fishing · December 3, 2018

tbarn · December 3, 2018

Ya, I've changed a few of those. They are kind of a bitch. Glad I'm retired. No more of that stuff. Pays a whole 1.2 hours under warranty.

rkj__ · December 3, 2018

Ah, it's good to see the part was revised.

pickmeup · December 3, 2018

Save your receipts because national highway safety board is investigating pump failure related accidents I read . Might be a recall it said .

Sierra Dan · December 3, 2018

3 hours ago, pickmeup said:

Save your receipts because national highway safety board is investigating pump failure related accidents I read . Might be a recall it said .

Do you have any links or other reading material to this information above?

pickmeup · December 3, 2018

I just googled it .

AlljackedupZ71 · December 3, 2018

We had ours replaced under warranty after a year of owning the truck... ours was whining real loud. I believe it's starting to do it again.. come on recall. hahahaha.