Vacuum pump leaking - Competition Diesel.Com

WILD_PHIL · 03-30-2017, 01:15 PM

I have a 92 W250. Before I picked it up the vacuum pump was replaced. I lost my PS pump last week so I replaced it. Then I lost my vacuum pump. I got the vac pump warrantied and put it back together.

The old one had the gasket and RTV on it. It didn't leak. When I replace mine I did not put RTV on it. Just the gasket. Now it's leaking. Is it common practice to put RTV and the gasket on the vac pump where it attaches to the timing case?

Sent from my SAMSUNG-SM-N910A using Tapatalk

R1raptor · 03-30-2017, 06:55 PM

I put a thin coat of permatex right stuff on both sides. Cummins calls for a thin bead on most paper gaskets in the 12 valve manuals I've got.

WILD_PHIL · 03-30-2017, 06:56 PM

Thanks for the response. I'm going to do it tomorrow. I knew I should have, but had a friend convince me otherwise. Lesson learned.

Sent from my SAMSUNG-SM-N910A using Tapatalk

hydroshok · 03-30-2017, 06:57 PM

I've always used just the gasket without an issue. Is everything tight and the surfaces cleaned before install? Maybe a piece of dirt or something got in between causing the leak.

Edit: treed. I never used a paper one. The one I got had a metal ring in it.

j.fondler · 03-31-2017, 08:55 AM

Gasket Maker | Share Corp

i use this on pretty much everything. I just slather it on the gasket with my hands until it's completely covered and then install. i'll also use it in place of a gasket on the timing cover

WILD_PHIL · 03-31-2017, 09:44 AM

I got a paper gasket with mine. Honestly I doubt it was cleaned well. I know there wasn't any gasket or RTV left but there may have been dirt or something.

Sent from my SAMSUNG-SM-N910A using Tapatalk

jimbo486 · 03-31-2017, 01:46 PM

I've never once had my vacuum pump leak when using a gasket alone. Never used a paper gasket though. Always used the metal gaskets that have a "bead" in them.

WILD_PHIL · 03-31-2017, 07:06 PM

Well I pulled the vac pump again this evening. There was a Lil bit of old RTV left on the timing case surface closest to the block that I missed. Cleaned up the timing case surface, went ahead and put RTV on it, and reinstalled. I'll keep yall posted

Sent from my SAMSUNG-SM-N910A using Tapatalk

WILD_PHIL · 04-02-2017, 07:30 PM

Well since we are talking gaskets let me ask this. Every oil pan gasket I've ever done I've pulled the engine and put it on a stand so it could sit upside down and cure.

Is this required on my 12v? I figure even if I do it while it's in the truck it will leak less than it does now. I'm trying to hold off on pulling the engine until my new engine is done.

Sent from my SAMSUNG-SM-N910A using Tapatalk

R1raptor · 04-02-2017, 08:35 PM

You can pull the pan in the truck just loosen motor mounts and jack it up. When I done it I had to drop the pickup tube in the pan and remove. Reinstalled the same way position pan with pickup laying in pan. Install pickup then slip gasket in.

j.fondler · 04-04-2017, 08:01 AM

Quote:

Originally Posted by WILD_PHIL

Well since we are talking gaskets let me ask this. Every oil pan gasket I've ever done I've pulled the engine and put it on a stand so it could sit upside down and cure.

Is this required on my 12v? I figure even if I do it while it's in the truck it will leak less than it does now. I'm trying to hold off on pulling the engine until my new engine is done.

Sent from my SAMSUNG-SM-N910A using Tapatalk

No, I've just always barely snuggled up the pan, let it "cure", then torque it down. Position of motor shouldn't matter.

jimbo486 · 04-07-2017, 10:25 PM

Quote:

Originally Posted by j.fondler

No, I've just always barely snuggled up the pan, let it "cure", then torque it down. Position of motor shouldn't matter.

I did that with mine the last time and found that it had been weeping very slowly along almost the entire perimeter. Maybe not enough used? Didn't wanna be to liberal with it and have any ooze into the pan.

Sent from my SAMSUNG-SM-N920A using Tapatalk

03-30-2017, 01:15 PM	#1
WILD_PHIL Name: WILD_PHIL Title: Too Much Time Status: Not Here Join Date: Nov 2009 Location: Texas Member`s Gallery Posts: 560	Vacuum pump leaking I have a 92 W250. Before I picked it up the vacuum pump was replaced. I lost my PS pump last week so I replaced it. Then I lost my vacuum pump. I got the vac pump warrantied and put it back together. The old one had the gasket and RTV on it. It didn't leak. When I replace mine I did not put RTV on it. Just the gasket. Now it's leaking. Is it common practice to put RTV and the gasket on the vac pump where it attaches to the timing case? Sent from my SAMSUNG-SM-N910A using Tapatalk __________________ Gather 2016 6.7 info before my purhase.

03-30-2017, 06:55 PM	#2
R1raptor Name: R1raptor Title: Diesel Enthusiast Status: Not Here Join Date: Nov 2011 Location: North florida Member`s Gallery Posts: 127	I put a thin coat of permatex right stuff on both sides. Cummins calls for a thin bead on most paper gaskets in the 12 valve manuals I've got. __________________ 93 chevy 3500 : 215hp p-pump, 5sp, 19, afc tuned ,plate delete , 3.54 d80 , slipping clutch. 83 chevy 3500 : 215 hp p-pump,5sp,19,afc tuned,plate delete,rack plug, valair ceramic single,3.42 14b, Vintage air, in need of twins.

03-30-2017, 06:56 PM	#3
WILD_PHIL Name: WILD_PHIL Title: Too Much Time Status: Not Here Join Date: Nov 2009 Location: Texas Member`s Gallery Posts: 560	Thanks for the response. I'm going to do it tomorrow. I knew I should have, but had a friend convince me otherwise. Lesson learned. Sent from my SAMSUNG-SM-N910A using Tapatalk __________________ Gather 2016 6.7 info before my purhase.

03-31-2017, 08:55 AM	#5
j.fondler Name: j.fondler Title: Slow Learner Status: Not Here Join Date: Nov 2016 Location: SD/TX Member`s Gallery Posts: 560	Gasket Maker \| Share Corp i use this on pretty much everything. I just slather it on the gasket with my hands until it's completely covered and then install. i'll also use it in place of a gasket on the timing cover __________________ 51 F5 - 93 w250 chassis - VE/47rh/np205 67 d100 - 89 d350 srw chassis - VE/a518 93 w250 - VE/47rh/NP205 - BAJA!!!! 12 3500 - studZ, deleteZ, tuneZ

03-31-2017, 09:44 AM	#6
WILD_PHIL Name: WILD_PHIL Title: Too Much Time Status: Not Here Join Date: Nov 2009 Location: Texas Member`s Gallery Posts: 560	I got a paper gasket with mine. Honestly I doubt it was cleaned well. I know there wasn't any gasket or RTV left but there may have been dirt or something. Sent from my SAMSUNG-SM-N910A using Tapatalk __________________ Gather 2016 6.7 info before my purhase.

03-31-2017, 01:46 PM	#7
jimbo486 Name: jimbo486 Title: Too Much Time Status: Not Here Join Date: Jan 2010 Location: Orange County, CA Member`s Gallery Posts: 1,617	I've never once had my vacuum pump leak when using a gasket alone. Never used a paper gasket though. Always used the metal gaskets that have a "bead" in them. __________________ 1990 Dodge D350 Giles' 12mm VE - Airdog II 165 - 370s @ 75lpm - BW S362fmw/68/12 - Hamilton 182/214 - '01 NV5600

03-31-2017, 07:06 PM	#8
WILD_PHIL Name: WILD_PHIL Title: Too Much Time Status: Not Here Join Date: Nov 2009 Location: Texas Member`s Gallery Posts: 560	Well I pulled the vac pump again this evening. There was a Lil bit of old RTV left on the timing case surface closest to the block that I missed. Cleaned up the timing case surface, went ahead and put RTV on it, and reinstalled. I'll keep yall posted Sent from my SAMSUNG-SM-N910A using Tapatalk __________________ Gather 2016 6.7 info before my purhase.

04-02-2017, 07:30 PM	#9
WILD_PHIL Name: WILD_PHIL Title: Too Much Time Status: Not Here Join Date: Nov 2009 Location: Texas Member`s Gallery Posts: 560	Well since we are talking gaskets let me ask this. Every oil pan gasket I've ever done I've pulled the engine and put it on a stand so it could sit upside down and cure. Is this required on my 12v? I figure even if I do it while it's in the truck it will leak less than it does now. I'm trying to hold off on pulling the engine until my new engine is done. Sent from my SAMSUNG-SM-N910A using Tapatalk __________________ Gather 2016 6.7 info before my purhase.

04-02-2017, 08:35 PM	#10
R1raptor Name: R1raptor Title: Diesel Enthusiast Status: Not Here Join Date: Nov 2011 Location: North florida Member`s Gallery Posts: 127	You can pull the pan in the truck just loosen motor mounts and jack it up. When I done it I had to drop the pickup tube in the pan and remove. Reinstalled the same way position pan with pickup laying in pan. Install pickup then slip gasket in. __________________ 93 chevy 3500 : 215hp p-pump, 5sp, 19, afc tuned ,plate delete , 3.54 d80 , slipping clutch. 83 chevy 3500 : 215 hp p-pump,5sp,19,afc tuned,plate delete,rack plug, valair ceramic single,3.42 14b, Vintage air, in need of twins.