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01-30-2018, 04:18 PM
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#1
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Name: SCHMITTY
Title: Not enough time
Status: Not Here
Join Date: Jun 2012
Location: K beach, AK
Member`s Gallery
Posts: 1,177
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Rebuilding a 96' 12 valve. The owner wants zero leaks
I've built a few marine v8 motors and Subaru along with a dozen or so transmissions. I've only had a couple tranny rebuilds leak and that was usually the dip stick hole- easy fix. This is my first cummins rebuild and the owner is sticking it in a 54' power wagon and kept bringing up leaks. I know my 95 leaks from all over the place.
Any areas to give special treatment to ? I'll buy some speedy sleeves if the crank needs them.
Starting to build a sweet stand tonight. I'm copying one off of CF. hopefully I can start it on the stand.
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stock 94
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01-30-2018, 06:35 PM
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#2
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Name: jasonc
Title: Too Much Time
Status: Not Here
Join Date: Nov 2009
Member`s Gallery
Posts: 4,396
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Add crank case vents, main reason these engines leak.
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01-30-2018, 06:38 PM
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#3
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Name: 79powerwagon
Title: Too Much Time
Status: Not Here
Join Date: Jul 2017
Location: MN
Member`s Gallery
Posts: 328
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I've had good luck using loctite hi tack on gaskets mated to imperfect sealing surfaces
Leak free stock tappet covers on my rigs using hi tack.
Guy on eBay was selling improved rear main seals
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1979 Dodge Warlock W150 Ppump 12v/518
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01-30-2018, 06:41 PM
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#4
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Name: biggy238
Title: Too Much Time
Status: Not Here
Join Date: Aug 2008
Location: Just North of Wrong
Member`s Gallery
Posts: 10,821
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I use loctite aviation sealer. Only had one mishap.
I second the crank case pressure sentiment
Sent from my XT1575 using Tapatalk
__________________
Check out @bdmaximusworx
05.5 Campanella White TDi Jetta 5spd 45.5MPG
-Little Sexy
'10 Silver F250 CCLB 4X4 6.4L cummins Swapped
Insta @trash.panda250
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01-30-2018, 10:34 PM
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#5
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Name: SCHMITTY
Title: Not enough time
Status: Not Here
Join Date: Jun 2012
Location: K beach, AK
Member`s Gallery
Posts: 1,177
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I'll check out those sealants. I have been using the permatex white thread sealant with good luck on some fuel fittings and transmission bolts. Sometimes I use a light coat of the "right stuff" and clean any little bit of extra that may push out.
I'll look into venting the crank case better also
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stock 94
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01-31-2018, 11:11 AM
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#6
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Name: jimbo486
Title: Too Much Time
Status: Not Here
Join Date: Jan 2010
Location: Orange County, CA
Member`s Gallery
Posts: 1,617
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Permatex has an aviation variant of their 'Form-a-Gasket' sealant. It was recommended to me by an engine builder who has had very good luck with it over many years and uses. It's pretty tacky stuff and is doing the job on my engine.
I'll cast a vote for crankcase ventilation.
__________________
1990 Dodge D350
Giles' 12mm VE - Airdog II 165 - 370s @ 75lpm - BW S362fmw/68/12 - Hamilton 182/214 - '01 NV5600
Last edited by jimbo486; 01-31-2018 at 11:13 AM.
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01-31-2018, 11:18 AM
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#7
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Name: SCHMITTY
Title: Not enough time
Status: Not Here
Join Date: Jun 2012
Location: K beach, AK
Member`s Gallery
Posts: 1,177
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It's been awhile since I've looked for my own use at upgraded crank case vent upgraded.
What type is that in the photo ?
24v has a better style also right ?
I'll do some research. I know my truck needs something also. It has 300k miles and when I'm over 50 psi boost the tailgate get oil droplets from the factory breather tube. I stuck a k&n style breather on my oil fill tube and by the time I got home from the parts store it had blown the top off the breather.
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stock 94
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01-31-2018, 11:27 AM
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#8
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Name: jimbo486
Title: Too Much Time
Status: Not Here
Join Date: Jan 2010
Location: Orange County, CA
Member`s Gallery
Posts: 1,617
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Those valve covers are used on engines built for industrial or agricultural applications. Cummins Dual Valve Cover Breather Kit 5.9L Diesel 12 Valve
The more filter elements, the better. You can use the breather that the 24v engines use in conjunction with anything else, of course. That's the breather that threads onto the timing cover, taking place of the oil fill tube and the hose runs straight down from it.
__________________
1990 Dodge D350
Giles' 12mm VE - Airdog II 165 - 370s @ 75lpm - BW S362fmw/68/12 - Hamilton 182/214 - '01 NV5600
Last edited by jimbo486; 01-31-2018 at 11:28 AM.
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01-31-2018, 12:21 PM
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#9
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Name: Red Sleeper
Title: Too Much Time
Status: Not Here
Join Date: Aug 2009
Location: Lone Star State
Member`s Gallery
Posts: 4,583
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Thanks for posting the link.
Sent from my SM-G930V using Tapatalk
__________________
Nick J
'14 Silverado LTZ 5.3 4wd
'05 Cummins QCSB 4wd 48re
'91 Cummins w350 5spd
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02-01-2018, 01:28 AM
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#10
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Name: SCHMITTY
Title: Not enough time
Status: Not Here
Join Date: Jun 2012
Location: K beach, AK
Member`s Gallery
Posts: 1,177
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Are you using 2 sets of those valve covers then jimbo ?
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stock 94
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02-04-2018, 09:43 PM
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#11
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Name: Destroked 450
Title: Too Much Time
Status: Not Here
Join Date: Mar 2015
Location: Harned,Ky.
Member`s Gallery
Posts: 340
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Yes he is, same as I'm doing, I went with the billet tappet cover also
Use two vented valve covers and plug the tappet cover vent.
__________________
Mine: 04 F-450 sc 4x4 fb drw 5.9 12v 215 ppump, zf6, kdp fixed, 3k gsk, AFC Live, super b single, pusher intake, d-celerator ebrake
Hers:2018 F-150 sc 4x4 5.0
Farm trucks: 01 Z71 ext cab, 95 S10, 93 F-800 8.3 Cummins, 87 AM General 5 ton
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02-09-2018, 11:18 AM
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#12
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Name: SCHMITTY
Title: Not enough time
Status: Not Here
Join Date: Jun 2012
Location: K beach, AK
Member`s Gallery
Posts: 1,177
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There's a sale on those valve covers right now. 169$
__________________
stock 94
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02-09-2018, 11:21 AM
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#13
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Name: SCHMITTY
Title: Not enough time
Status: Not Here
Join Date: Jun 2012
Location: K beach, AK
Member`s Gallery
Posts: 1,177
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__________________
stock 94
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02-09-2018, 11:47 AM
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#14
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Name: Red Sleeper
Title: Too Much Time
Status: Not Here
Join Date: Aug 2009
Location: Lone Star State
Member`s Gallery
Posts: 4,583
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Thanks for the heads up. Ordering two sets!
__________________
Nick J
'14 Silverado LTZ 5.3 4wd
'05 Cummins QCSB 4wd 48re
'91 Cummins w350 5spd
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02-09-2018, 08:14 PM
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#15
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Name: Destroked 450
Title: Too Much Time
Status: Not Here
Join Date: Mar 2015
Location: Harned,Ky.
Member`s Gallery
Posts: 340
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$150 each if you buy 2.
$152 for 1 at my local Case New Holland dealer.
__________________
Mine: 04 F-450 sc 4x4 fb drw 5.9 12v 215 ppump, zf6, kdp fixed, 3k gsk, AFC Live, super b single, pusher intake, d-celerator ebrake
Hers:2018 F-150 sc 4x4 5.0
Farm trucks: 01 Z71 ext cab, 95 S10, 93 F-800 8.3 Cummins, 87 AM General 5 ton
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02-12-2018, 08:46 PM
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#16
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Name: tornado112
Title: Too Much Time
Status: Not Here
Join Date: Apr 2011
Location: The Great Garden State
Member`s Gallery
Posts: 290
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with those valve covers you still need a catch can if you dont want any leaks
__________________
94 Regular Cab Intake 5x12 Contagious Injectors 4kGSK and 60lb springs Adjustable Pump Gear and Timing Cover Auto Meter Steering Box Brace Sphon Adjustable Trac Bar Sphon Sway Bar Links Vision 19.5 Michelin 265-75-19.5 MegaTREK
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02-12-2018, 09:09 PM
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#17
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Name: Tobin
Title: 5.7 IDI Powaa!
Status:
Here
Join Date: Oct 2008
Location: Oviedo, FL
Member`s Gallery
Posts: 1,497
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Vacuum pump!
__________________
2006 Dodge 2500 QCLB 4x4 Goerend 48RE
1977 F250 RCLB 4x4 "High Boy" 12 valve, 180 pump, 5x.014, S363/S475, Goerend 47RH, NP271, 2007 D60/Sterling 10.5, 40" Toyo MTs
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02-13-2018, 10:19 AM
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#18
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Name: Destroked 450
Title: Too Much Time
Status: Not Here
Join Date: Mar 2015
Location: Harned,Ky.
Member`s Gallery
Posts: 340
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Once you have the vented valve covers you want to plug the vent tube on the tappet cover.
That will stop one leak, you won't need a catch can for the vent hose on the vented valve covers.
__________________
Mine: 04 F-450 sc 4x4 fb drw 5.9 12v 215 ppump, zf6, kdp fixed, 3k gsk, AFC Live, super b single, pusher intake, d-celerator ebrake
Hers:2018 F-150 sc 4x4 5.0
Farm trucks: 01 Z71 ext cab, 95 S10, 93 F-800 8.3 Cummins, 87 AM General 5 ton
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02-13-2018, 11:11 AM
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#19
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Name: tornado112
Title: Too Much Time
Status: Not Here
Join Date: Apr 2011
Location: The Great Garden State
Member`s Gallery
Posts: 290
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Quote:
Originally Posted by Destroked 450
Once you have the vented valve covers you want to plug the vent tube on the tappet cover.
That will stop one leak, you won't need a catch can for the vent hose on the vented valve covers.
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Do the valve covers come with some type of steel wool under the plastic part to catch the oil?
__________________
94 Regular Cab Intake 5x12 Contagious Injectors 4kGSK and 60lb springs Adjustable Pump Gear and Timing Cover Auto Meter Steering Box Brace Sphon Adjustable Trac Bar Sphon Sway Bar Links Vision 19.5 Michelin 265-75-19.5 MegaTREK
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02-13-2018, 11:21 AM
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#20
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Name: SCHMITTY
Title: Not enough time
Status: Not Here
Join Date: Jun 2012
Location: K beach, AK
Member`s Gallery
Posts: 1,177
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He's putting the motor in a 54' power wagon. He wants it extra clean. I'm sure if it drips from the breather hose a little he can throw a catch can on. The seals are my main concern and other leak prone areas. So extra CCV , aviation sealer on the tappet cover and timing cover ?
Is there a preffered ring gap ? I down loaded one manual(haven't read it yet).
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stock 94
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