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Old 02-20-2012, 04:53 AM
95ram 95ram is offline
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Default rebuilding 12v head

Well I'm pretty sure I blew the Head Gasket on my 98 Dodge Cummins 12V. It made an extra gallon of oil. I'm going to pull the head today it tomorrow. It's going to get decked, o-ringed, studs and 60 lb Valve Springs. The wife said "do it right so it doesn't happen again." My question is what else should I do to make it better? Id like to do a P&P but I don't have the $$$ for the stuff I'm already doing so its out of the question.

Last edited by stodg73; 09-15-2012 at 05:18 PM.
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Old 02-20-2012, 07:04 AM
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Are you loosing coolant or does your oil smell like diesel?

If you are loosing coolant, then you probably have headgasket issues.

If the oil smells like diesel, then you may have a stuck/leaky injector.

Read through this and see how much will apply to you. Suggested upgrades for diesel engines. I know that this applies mostly towards the Bosch VP44 Injection Pump engines, but you should be able to apply it to the 12v.
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Last edited by stodg73; 09-15-2012 at 05:19 PM.
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Old 02-20-2012, 09:45 AM
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Mopar1973Man Mopar1973Man is offline
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You might fill in your signature so we know mor about your truck. How much boost are you creating? How much HP/TQ are you making roughly?
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2002 Dodge Ram 2500, 5.9L Cummins Turbo Diesel, 5 Speed NV4500 transmission, 4x4, 3.55 Gears, AirDog 150 fuel pump with 1/2" Big Line Kit, Stock Bosch VP44 Injection Pump, Bosch RV275 Injectors +40HP, Edge Comp Performance Box, BHAF (Big Honkin' Air Filter), Stock Holset HX35W Turbo, Straight 3" Pipe Exhaust, Crankcase Vent Mod, High Idle Mod, MPG / IAT fooler Mod, ScanGauge II, 25% Tinted Windows, DiPricol Gauges (Fuel pressure, Boost, Pyrometer), 235/85 R16 tires mounted on 16x7 Aluminum mags (weighing 62#), Custom Fog Lights, Custom Backup lights, Silverstar Headlights, 23-24 MPG

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Old 02-20-2012, 01:41 PM
95ram 95ram is offline
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It's a basically stock pickup with a fuel plate and boost elbow. I was making roughly 35psi at FT, but this was very very rare.
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Old 02-20-2012, 07:09 PM
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If there was a sticking injector you would certainly know it with a 12 valve. You should be able to machine the head to get it flat. That is all I did for mine plus a .020 over gasket and mine holds 35 psi with stock bolts. If you are not planning any major upgrades in power (40 psi +) you are wasting your money in my opinion with heavier springs, o rings, and studs. Pull your bolts and check them carefully. You may have had one get wet with antifreeze and rust enough to fail. Was your oil milky colored or was it thinned out?
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Old 02-20-2012, 08:39 PM
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I wouldn't say I'm planning on major upgrades, but what I am planning on doing will require studs and orings. Lets call it mild. Reason I think its the head gasked it I'm loosing coolant and gaining oil. The oil is thinned out. I also have oil in my coolant.
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Old 02-20-2012, 08:58 PM
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Quote:
Originally Posted by 95ram View Post
I wouldn't say I'm planning on major upgrades, but what I am planning on doing will require studs and orings. Lets call it mild. Reason I think its the head gasked it I'm loosing coolant and gaining oil. The oil is thinned out. I also have oil in my coolant.
That tells me that you have an oil cooler problem not a head gasket problem. Pull your oil filter and unbolt the cooler (after draining the coolant of course) and pressure test it. Once you determine if it is a cooler or the gasket you can clean the cooling system out with Dawn dish soap. It gets to be a real pain in butt to get everything cleaned and ready to go again....
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Old 02-24-2012, 02:44 AM
95ram 95ram is offline
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Ended up being the HG. It was blown apart between 3 and 4. Oil cooler held pressure. Every time I've blown a HG I've gotten oil in the coolant and coolant in the oil.
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Old 02-24-2012, 09:06 AM
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Thanks for letting us know what happened.

Usually, no one tells the cause of the problem or their solution.

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Toys:
'79 CJ5, 258ci, 3" lift, 33x12.50x15, Stock Engine and 3 Speed Tranny
'05 Suzuki, GSX1300R, Hayabusa, All Stock, #3('00 blown engine, '00 stolen, & '05)
The complete live & learn and pass it on by H. Jackson Brown, Jr.
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Old 02-24-2012, 03:06 PM
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Quote:
Originally Posted by 95ram View Post
Ended up being the HG. It was blown apart between 3 and 4. Oil cooler held pressure. Every time I've blown a HG I've gotten oil in the coolant and coolant in the oil.
Huh! So, how did the oil get into the coolant? The oil isn't pressurized around the headgasket, but the coolant is. Both times I had mine let go it only put anti-freeze out over the water pump and the second time it blew between 5&6. The only way I knew it was a headgasket was because of the "THUMP THUMP THUMP" sound coming out of my intake.
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