So my vaccum pump blew up

[zukinut]

This morning i was driving my 97 psd and it started screaming like a idler pulley locked up. Went to pull over and had no brakes. So i knew it was the vaccum pump. When i got stopped, i opened the hood and it had blown its oil all over everything. The entire side of the engine, the battery, the air box, the radiator and the hood were covered in this nasty gray slime. Not sure exactly what happened because i havent taken it off yet, but ive definately never seen that happen before.

Will

 

[david85]

I thought the vacuum pumps were an oil less design, ok, well I assumed really.

 

[NCheek]

I'm fairly sure they have a small reservoir, if I remember MIDNIGHT RIDER'S description of the little buggers...

 

[OLDBULL8]

How could that much oil come from the vacuum pump ? They arn't big enough to hold more than a couple of table spoons of oil.

Nasty gray slime is water in the oil or visa versa. the vacuum pump belt slipped on account of the oil on it, hence no vacuum. Check your oil dip stick. Pull a valve cover and see if the inside is gray slime. The oil cooler may have blown O'rings.

 

[LCAM-01XA]

They got oil alright, it lives inside the casting for the cam driven by the pulley.

 

[david85]

Any way to check or change the oil?

 

[6 Nebraska IDIs]

HEY! Now Im not the only one who's had these pumps literally explode on me!

 

[NCheek]

Any way to check or change the oil?

It's probably more along the lines of dump it all out and refill. Midnight Rider will chime in, he will know.

 

[LCAM-01XA]

It's probably more along the lines of dump it all out and refill. Midnight Rider will chime in, he will know.

Yep, drain and refill. Easiest done with the pump off the truck.

 

[david85]

What oil does it take?

 

[typ4]

I use synthetic motor oil.

 

[jtate]

yep i put a brand new one on my truck, lasted a total of 20 min. i read somewhere but dont remember where thats its best to drain the oil out of it and refill with a different oil to make it last longer.

 

[wanabebig]

i had a vac pump go out on me.. and wanted to see what was inside of it.. so i took it apart and it has oil.. lol didnt know that when i started and got it all over the hardwood floor in my room. now i know not to do that again..