rsh_757 wrote: Today's Aluminum is pretty good stuff. It isn't like an old Vega or anything. That said, it still transfers heat like aluminum. More and more even the companies that have been known to stay away from aluminum are using it. It just brings the weight down so much.
So you must not have any warranty left, but you say it was a casting defect? Who told you that? GM? I wouldn't give up on it. I would just change the oil, run it good and repeat that process a few times. You can have the oil evaluated. (that is once you have the problem fixed)
If you have any worries, trade it in, don't sell it. Let the dealer resell/warranty it for someone else rather than being the guy who sold it outright to a private party. Unless of course you explain fully to them what has happened.
It has porosity in the casting. The void was about 3/16 to 1/4 deep and the crack ran through it.
Perrysburg Dodgeboy wrote: What made GM think you could take an Olds V-8 gas block and turn it into a Diesel? Why because they are GM, all but killed diesels in the US market for years.
BTW most diesel trucks come with a 7 year or 100,000 mile warranty don't they?
Don
I could be wrong here, but i thought the duramax was made by Isuzu. So what would a olds V8 have to do with the duramax engine?
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As far the warranty, I bought an extended warranty that had a $10,000 cap on it. After 2 major transmission repairs, this money was gone. On top of that, the transmission was still not right. I ended up putting apx $7000 worth of Suncoast transmission into the truck. Now a month or so down the road, the oil has coolant in it.
GM claims that the engine warranty was voided to a major change to drive train. They said the Suncoast transmission puts addtional stresses on the engine and therefore the engine repair would not be covered. Seems like a bunch of BS to me, but thet is what they are saying. I have disassembled truck with a damaged head, a big bill to pay at the stealership, and I am quickly getting sick of the whole thing.
bendmore wrote: As far the warranty, I bought an extended warranty that had a $10,000 cap on it. After 2 major transmission repairs, this money was gone. On top of that, the transmission was still not right. I ended up putting apx $7000 worth of Suncoast transmission into the truck. Now a month or so down the road, the oil has coolant in it.
GM claims that the engine warranty was voided to a major change to drive train. They said the Suncoast transmission puts addtional stresses on the engine and therefore the engine repair would not be covered. Seems like a bunch of BS to me, but thet is what they are saying. I have disassembled truck with a damaged head, a big bill to pay at the stealership, and I am quickly getting sick of the whole thing.
The warranty was voided? Well, you should have never had to use that extended warranty in the first place. Sounds like a real mess to me.
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I had a 1998 Dodge 1500QC with a pourous block. The coolant level in the reservoir would slowly go down. I could smell hot antifreeze when I shut down the engine. Pressure test, hydrocarbon test did not show leakage but dye test did. Tech showed me what he poured into the cooling system to stop it, a small 4-6oz bottle with a blue Mopar label on it, thick black stuff. After that the problem went away, and I sold the truck off within 3 months. How much coolant seepage are you talking about? Doesn't take much antifreeze in the oil to ruin crank and big end rod bearings. I had intake manifold gasket fail on a Chevy V-6, I replaced the intake and head gaskets, had the deck magnafluxed, heads checked for warpage, put it all back together and it ran fine. Within a month the idle oil pressure had dropped to less than 5psi, then soon zero. New Mr. Goodwrench crate engine was the solution.
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It is advisable to pull the engine and do a complete overhaul right down to the cam bearings, reason being the additives in antifreeze will cause grave damage to the bearing material. I would not change oil and run it with out at least dropping the pan and checking the main and rod bearings that could cause more damage to the rest of the parts. I was in the Craftsmans guild ( GM. Detroit Diesel, Allison mechanic).many years and saw many bearing surfaces that looked like someone had peeled the layers off right down to the brass after the antifreeze leaked into the oil, unfortunately it would adhere to the crank and it would wind up gouging / striping the brass off the bearings and causing them too turn in the journals which is a whole can of worms you do not want to open. At least drop the pan and check the mains, and rod bearings. Go after GM on this, that engine should not be out of warranty. When I worked on diesels the squeaky wheel always got the grease. CF and Greyhound where big buyers of Detroit diesels and I remember overhauling many of them after a million miles under warranty.
Bendmore if you can prove the head has porosity that is a casting defect and has nothing to do with any tranny change. Ask for a factory rep and show him/her the casting and tell them you will eat the labor cost if they can eat the parts cost, or they can pay your Attorneys fees and the entire repair bill. Then see what they say.
1jeep it has to do with GM’s whole attitude and the why they think, all of the big three really. This is JMO
bendmore wrote: FOund out yesterday why my truck had antifreeze in the oil. It appears that casting defect was the starting point of a crack in the head, allowing the contamination.
BTW - For those who did not know (myself included), the Duramax has aluminum heads. What made them think that aluminum would withstand this amount of heat and pressure that is created by a diesel engine?
I do not know what to do with this truck now, I am concerned that the lower end has been damaged by the contaiminated oil, among other things.
Lots of diesel engines have gray medal heads. Cummins is making a V8 with the same heads. Friend had his dodge cummins head problem talked about in the TDR magazine. Cost him big bucks so what's perfect? chevman
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