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| Dodge Competition and Performance General Dodge Competition and Performance Discussion |
05-06-2017, 09:42 PM
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#1
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Name: Ruben774
Title: Green Behind the Ears
Status: Not Here
Join Date: Feb 2009
Location: Norman OK
Member`s Gallery
Posts: 89
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Multiple head gasket failure
I know that there are several hundred threads on this all ready but I didn't want to hyjack someone else's thread.
I'm on my third head gasket. The head is o ringed and when I pull the head it doesn't appear that compression is blowing it out. What I'm wondering is if the 425 studs are stretching enough that the water pump is pushing enough pressure to wash it out? Thermostat being the restriction. What's your thoughts on that?
What I had planned on doing is remove the thermostat and put 625s in it. And possibly putting a electric water pump on. Do you think this will hold better?
__________________
97 Dodge shorty, 4x4, 12v, Farrell 13mm pump, Ducky 5x25, 75mm over 95mm, 48re, Anteater
06 Chevy shorty, 4x4, efilive
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05-06-2017, 09:57 PM
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#2
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Name: YoungDiesel27
Title: Never Enough Time
Status: Not Here
Join Date: Jul 2010
Location: West Virginia
Member`s Gallery
Posts: 825
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Where does the leak happen? External or mix fluids.
__________________
EFI Live, HP Tuners, Smarty custom tuning
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05-06-2017, 10:06 PM
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#3
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Name: Ruben774
Title: Green Behind the Ears
Status: Not Here
Join Date: Feb 2009
Location: Norman OK
Member`s Gallery
Posts: 89
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External under the exhaust manifold.
__________________
97 Dodge shorty, 4x4, 12v, Farrell 13mm pump, Ducky 5x25, 75mm over 95mm, 48re, Anteater
06 Chevy shorty, 4x4, efilive
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05-07-2017, 12:01 AM
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#4
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Name: Big Blue24
Title: Comp Diesel Sponsor
Status: Not Here
Join Date: Jan 2008
Location: Cedar City, UT
Member`s Gallery
Posts: 6,310
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Fire Rings are the solution! Too much power for a reliable setup with orings and ARP 2000 studs.
__________________
95' 2wd Junker Drag Truck
1502 HP Fuel-Only 12mm P7100 Pump
SXE 472 over GTX55 116mm 
OEM 12v Block 
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05-07-2017, 06:01 AM
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#5
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Name: Drothgeb
Title: Almost Fast-N-Loud
Status: Not Here
Join Date: Sep 2010
Location: Maryland
Member`s Gallery
Posts: 820
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The compression ring doesn't really blow out usually. It just lets enough hot combustion gas leak by that it burns out the softer sealing material around the oil and/or water passages. I've had two builds that single O-rings wouldn't hold, that I switched to double O-rings. That solved the problem with both. Current engine has made it a year at around 1000 hp. But it looks like you may be well above that, and should consider fire rings as Will said. Either way I'd use 625s.
__________________
95 RCLB 4WD
10.66 sec, 128.93mph
I'm not a Cummins expert, but I did sleep at Holiday Inn Express
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05-07-2017, 01:12 PM
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#6
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Name: Ruben774
Title: Green Behind the Ears
Status: Not Here
Join Date: Feb 2009
Location: Norman OK
Member`s Gallery
Posts: 89
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Drothgeb:
Are 1/4 times are pretty close. When you say double o-rings, are you putting one in the head and one in the block at different diameters? I just find it crazy that its never blown oil out. Always water and different spots each time.
__________________
97 Dodge shorty, 4x4, 12v, Farrell 13mm pump, Ducky 5x25, 75mm over 95mm, 48re, Anteater
06 Chevy shorty, 4x4, efilive
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05-07-2017, 02:25 PM
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#7
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Name: Ruben774
Title: Green Behind the Ears
Status: Not Here
Join Date: Feb 2009
Location: Norman OK
Member`s Gallery
Posts: 89
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Never mind on the double o-ring. I searched and found your thread on it.
__________________
97 Dodge shorty, 4x4, 12v, Farrell 13mm pump, Ducky 5x25, 75mm over 95mm, 48re, Anteater
06 Chevy shorty, 4x4, efilive
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05-08-2017, 07:19 AM
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#8
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Name: zfaylor
Title: Comp Diesel Sponsor
Status: Not Here
Join Date: Nov 2010
Location: P-TOWN!, Indiana
Member`s Gallery
Posts: 5,024
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The deck of your block is perfect? I've pulled many of heads off of trucks where people and "shops" thought it was OK for a block to have a pile of pitting on it.
__________________
2015 half ton heavy chevy
81 Fairmont LS project
Many yard ornament projects...
North American Turbo
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05-08-2017, 07:21 AM
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#9
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Name: Justappumped24v
Title: Too Much Time
Status: Not Here
Join Date: Feb 2016
Location: Illinois
Member`s Gallery
Posts: 1,311
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Get the head surfaced, orings and fire rings never heard of them.... but I haven't heard of compounds either.
__________________
05 QCSB24v HTD 6.8L, DDP fueling PDD shifted
2011 MCSB 6.7, built 68rfe
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05-08-2017, 08:29 PM
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#10
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Name: Ruben774
Title: Green Behind the Ears
Status: Not Here
Join Date: Feb 2009
Location: Norman OK
Member`s Gallery
Posts: 89
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Quote:
Originally Posted by zfaylor
The deck of your block is perfect? I've pulled many of heads off of trucks where people and "shops" thought it was OK for a block to have a pile of pitting on it.
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Its hard to say now after 3 years of running this motor. Surface looks good but thats not saying much.
__________________
97 Dodge shorty, 4x4, 12v, Farrell 13mm pump, Ducky 5x25, 75mm over 95mm, 48re, Anteater
06 Chevy shorty, 4x4, efilive
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05-08-2017, 09:37 PM
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#11
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Name: Redrider2911
Title: Too Much Time
Status: Not Here
Join Date: Nov 2015
Location: Yakima, WA
Member`s Gallery
Posts: 780
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I went through 3 head gaskets with oringed head. The last time I made sure to be dilegent on retorques. Torqued my 425s to 135. I'm running .010 protrusion. This last time I also sprayed copper coat on the head and block, made sure to let it dry completely before assembly. Been holding for the last few months hot rodding it to work and back WOT pulls every chance I get plus 6 12.6 passes at the track this last weekend (need to work on some tuning).
__________________
49 Willys Pickup. 5600lb. 11.8sec @115mph 1/4. 12 valve. MegaSquirted 47RH. 3.54 posi rear. 35" tires. 64mm HE351ve, S475 (75/96/1.32), A/W Intercooler. AFC mods. 5x16s. 191 DVs, 180 pump. 23*. 85psi. Build Thread
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05-09-2017, 08:27 AM
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#12
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Name: jlbayes
Title: Too Much Time
Status: Not Here
Join Date: Mar 2011
Location: michigan
Member`s Gallery
Posts: 2,399
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Quote:
Originally Posted by Ruben774
Its hard to say now after 3 years of running this motor. Surface looks good but thats not saying much.
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So the deck surface has never been checked with a machinist block and feeler gauges?
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Jacob, 97 rclb
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05-09-2017, 12:45 PM
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#13
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Name: TheHammer
Title: broke
Status: Not Here
Join Date: May 2012
Location: juneau wi
Member`s Gallery
Posts: 738
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Quote:
Originally Posted by zfaylor
The deck of your block is perfect? I've pulled many of heads off of trucks where people and "shops" thought it was OK for a block to have a pile of pitting on it.
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be willing to bet this is the issue, see it freaquently.
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