Vacuum pump troubles - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 14 (permalink) Old 03-30-2011, 06:15 PM Thread Starter
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Vacuum pump troubles

I seem to have a vacuum pump issue. I just dropped this low mile '95 PSD in my '96 truck and it runs like a top. There were no troubles for a couple of days. After that, I developed a squeak/squeal in the front corner of the drivers side block....it was either the vac pump or power steering...couldn't be certain. It didn't sound too bad and always went away when it warmed up. After a week or two of this the squeal got progressively worse and wouldn't go away. I just waited until whatever it was went bye-bye. It was the vac pump. It grenaded in grand fashion. Blew the back half of the pump off. Problem found! Of course the timing was pretty bad...right in rush hour traffic. Not the best place to lose braking power, esp with a load on board.

I replaced it with another one I had in the shop with about 55k on it and all was well for a couple of days. Now, the same squeal has returned. The vac pump seems to be operating as it should as the brakes and ac are still doing fine... yet that squeal is back. It was gone for a couple of days...so I know I am not going crazy. Is there something that could be taking my vac pump out? Something I have missed? Or is it just a bit of dumb luck? I hate to have to replace it again since I now need to replace my glow plug relay methinks. Too much going wrong at the same time.

Any thoughts?
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post #2 of 14 (permalink) Old 03-30-2011, 06:50 PM
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Re: Vacuum pump troubles

I had a similar problem with my truck, had my brother take a look at it cuz it was 230 in the morning, and one look he said gete a new belt tensioner. The new tensioner is about 2-3 inches longer and was told that the new belt are longer so the belt is going to slip like crazy. Swapped in new tensioner never heard it squeak again. maybe something to try iirc its about $20-$30

'95 F350
IDM mod, FPR shim, 3 1/2" DP and CAT delete, aFe Big Boost, Quad pod-autometer Z seires gauges, 4" straight pipe exhuast, TS 6 position chip from KT performance

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post #3 of 14 (permalink) Old 03-30-2011, 11:36 PM Thread Starter
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Re: Vacuum pump troubles

This sound is coming from behind the belt area...don't think its the belt at all. It has a more metallic sound than a belt would make. I think I'll just run it until something happens like the last time.
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post #4 of 14 (permalink) Old 03-31-2011, 12:56 PM
Can a 1 ton do a wheelie?
 
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Re: Vacuum pump troubles

trial by error...... I like it

'95 F350
IDM mod, FPR shim, 3 1/2" DP and CAT delete, aFe Big Boost, Quad pod-autometer Z seires gauges, 4" straight pipe exhuast, TS 6 position chip from KT performance

"Would it kill you to buy american" Clint Eastwood


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post #5 of 14 (permalink) Old 04-01-2011, 02:52 AM
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Re: Vacuum pump troubles

Back in my atv days, a good buddy was always building banshee's for sand drags, If one made an odd noise, he'd just run it's balls of
"make it show itself" was the motto.
Although I'm sure he wasted a lot of money like that
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post #6 of 14 (permalink) Old 04-01-2011, 02:59 AM
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Re: Vacuum pump troubles

I wonder if the 2nd pump had just sat to long and the bearings dried up. btw I wouldn't wait unless you like walking

1997 f250 4x4 sclb, auto, 3.55's, 191k, diy intake w 6637, ccv mod, pyro, boost, trans gauges, 3" dp to 4" single exh. super chips for now. scangauge
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post #7 of 14 (permalink) Old 04-01-2011, 05:22 AM Thread Starter
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Re: Vacuum pump troubles

Dry bearings sounds very plausible. Are they serviceable?

'96 F250 SC 4x4 auto with hi miles
'95 7.3 Stroke with low miles
6637 intake
MBRP downpipe
lots of plans...little clams
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post #8 of 14 (permalink) Old 04-01-2011, 06:33 AM
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Re: Vacuum pump troubles

No they are not serviceable. Go get a new pump and put it on before you kill someone.

97 F-350 XLT CC DRW 4X4 PSD, 285/75-16 Custom bumpers, Gauges-boost/egt/trans, Swamps IDM, 3.5"dp- 4" exh., 3" Body lift, ES bushings/mounts, Built trans, billet conv, B&M pan, Hayden cooler, Adrenaline, stage 2's, IC, H2E, E-fuel
ARP's, 910's, Smith Bros. to come
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post #9 of 14 (permalink) Old 04-01-2011, 02:34 PM Thread Starter
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Re: Vacuum pump troubles

No one will die...it will be handled well before that.

'96 F250 SC 4x4 auto with hi miles
'95 7.3 Stroke with low miles
6637 intake
MBRP downpipe
lots of plans...little clams
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post #10 of 14 (permalink) Old 04-01-2011, 03:28 PM
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Re: Vacuum pump troubles

Ive had the same problem several times, so I'm now on the 4th or 5th pump but the last two times the pulley was cocked just enough to the side to do the damage but while its on the truck running you couldn't tell

1997 F350 7.3 Powerstroke, 4x4, 135,400 miles, 4 1/2" up front 2" out back, 35" Kuhmo M/T's, 3" dp, 4" with no cat, K&N, Triple Auto Meter Gauges, IDM Mod, rebuilt E4OD, Beans Tunes
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