Vacuum pump sheared off
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Vacuum pump sheared off
I have an 88 7.3 idi and while I was driving I guess a bolt in the vacuum pump came loose, fell out, then the pump twisted and the other bolt sheared off. I drove home with it off and I had barely any brakes and my tranny was shifting weird.
What does the vacuum pump control exactly and how bad is it to drive without it?
Also what would be the best way to get the bolt out of there? Thanks
What does the vacuum pump control exactly and how bad is it to drive without it?
Also what would be the best way to get the bolt out of there? Thanks
Lead Driver
Joined: Apr 2008
Posts: 6,938
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Supposed to be 3 bolts that hold it in. Vacuum controls the climate control in cab depending on year and trim, also gives vacuum to the C6 auto, as well as power brakes. Ive driven with a leak... no way i would drive w/out a pump.
Logistics Pro
Joined: Sep 2007
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From: Western Mass
If its the original engine, an 88 should be V-belts.
The vacuum pump is held onto a bracket with 3 bolts. That bracket is then bolted onto the engine with 2 bolts. I can't remember if it bolts directly into the engine block, or if there is another bracket it attaches to. If the vac pump bracket attaches to another bracket, pull that bracket out to attack the problem on your workbench.
If you are lucky, and can grab onto some of the bolt, vise grips might get it out easily. If you have access to a welder, weld a nut on to the remaining bit and use that to get it out. Or carefully drill it out, and clean up the threads with a tap. That will most likely be a real pain in the butt due to the location of the vacuum pump.
The vacuum pump is held onto a bracket with 3 bolts. That bracket is then bolted onto the engine with 2 bolts. I can't remember if it bolts directly into the engine block, or if there is another bracket it attaches to. If the vac pump bracket attaches to another bracket, pull that bracket out to attack the problem on your workbench.
If you are lucky, and can grab onto some of the bolt, vise grips might get it out easily. If you have access to a welder, weld a nut on to the remaining bit and use that to get it out. Or carefully drill it out, and clean up the threads with a tap. That will most likely be a real pain in the butt due to the location of the vacuum pump.
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Logistics Pro
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That's odd, I've never seen a dual belt P/S pump on an IDI before. But then maybe that's the factory A/C delete? I've never seen an IDI without air either so I dunno.
Your best bet would be to pull that mount the pump bolts to and drill out that bolt.
I drove my '92 around for a while with a dead vacuum pump. People that cut me off never knew they were taking their lives into their own hands. Stopping a crew cab F350 dually with no power assist isn't something to be done without plenty of prep time. Legs got a good work out though.
Your best bet would be to pull that mount the pump bolts to and drill out that bolt.
I drove my '92 around for a while with a dead vacuum pump. People that cut me off never knew they were taking their lives into their own hands. Stopping a crew cab F350 dually with no power assist isn't something to be done without plenty of prep time. Legs got a good work out though.
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Joe Kucinski
Senior User
Joined: Mar 2013
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From: Agassiz, BC Canada
I personally would pull the bracket and try welding nuts to the sheared off bolts. If done this lots on rusted, stripped and broken hardware. As a bonus, if its corroded in place the heat from the welding will often loosen things up.
If you don't have access to a welder a drill and easy out would probably be the next best option.
If you don't have access to a welder a drill and easy out would probably be the next best option.
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As for the broken bolt I got the bracket off that it's stuck in so now I just gotta get it out. I bought a little bolt extractor tool from napa that says 3/16 on it. Does that mean I have to drill it with a 3/16 hole then use the tool to remove the bolt?