It could be the heads were just crap from the beginning I suppose. Did you ever end up calling up Odessa? The fuel is coming from somewhere. Did you look over the nozzles really well, they can crack and leak fuel like this too. Check your oil level, make sure the crankcase isn't filling up with fuel.

That's a really good deal on the 6.7 cummins. I wouldn't bother wasting money putting an allison behind it, keep the Dodge tranny and just have it built, WAY easier and money ahead.

I wouldn't even go 6.7 route personally, but that's just me. 5.9 CR would be my choice. Check your local laws first, a lot of states require the engine going in to be the same year or newer too. Obviously the 6.7 would work, but I'm not a fan of them.

 

Well most 5.7l go from 1500 to 3500 so why not go with more power from the start. Just a thought and thanks for the advice on tranny. You always think it'd be a lethal combo and I could see there being a price difference with the allisons.

Yea I checked everything carefully the last time I removed the injectors. I just talked to Clearwater today, I explained what was happening an what I had done up to this point. I didn't even get to the end, as soon as I mentioned the thought of bad cups or head he stopped me and said get it off and I'll have UPS pick it up. Get it off and get it back to us asap. So thats good and bad news. I'm glad they are willing to work on it no questions. On the other hand I change the heads with the cab on so my back will hate me for the next week. I know it's not hard to take the cab off, but I can have the heads off in a couple hours with it on so it's all good.

The main thing now is do I go ahead and send both heads while I have the warranty? Or do I chance it and hope the other side is still good? My thought is they come in pairs, well really they're the same heads just turned around so I'm really thinking of sending both back since they are from the same batch. Good idea or no? (more work but guaranteed to rule out head problems further on if I know both heads are good from the start)

And we down here in Arkansas dont care about no laws. As long as you can spin dem tires and haul *** down gravel roads from the po po. HA HA But no really they don't check that **** here, especially with states like texas, cali, and new york with 1000X the cars.

 

I don't see the 6.7 having any power advantages from the start either, but that's me. The 6.7 will of course have the advantage of displacement and can spool a slightly larger charger easier, but you're really splitting hairs at that point. I see a lot of issues with emissions controls and a lot of headgakset issues on 6.7's. I just think the 5.9CR is just as potent and more trouble free. Isn't that really what you're after anyways?

That's good that they're willing to stand behind them. I know it's more work, but at this point to ensure everything is A-ok, I'd probably send both heads man...

 

Yea the 5.9 is proven and I understand that side of it. Yea I might as well. Hopefully I'll have the answer posted within a week or two. But will they really admit it was a bad head? Their fault? I don't know, all I can hope is they figure out what the hell is going on with that cylinder head, fix it, and I can have my answers. Thanks for all the input anyways, I definately won't leave ya hanging if it gets figured out. If I can help provide more insight to 6.0 owners and help save some money then it's all worth it in the end. And it doesn't hurt to know of another cause of 6.0 problems.

 

Thanks, definitely looking forward to seeing what fixes this one.

 

Is there any reason the glow plugs would have oil on them. When I pulled em out some had oil all over them, problem or normal?

 

They get oil in them from the rail when you pull them out, not from the cylinder. That's why they have those cheesy plastic plugs in valve cover, to prevent oil from coming out from the head. Normal. They get hot enough when you turn the key they'd certainly burn any oil off anyways, so that's really the only way they can get it.

 

Ok just making sure. I guess I didn't notice it the other times I took them out.

 

What would have to happen in order to cause low compression? Aside from the walls of the cylinder wearing down and the rings not sealing properly. I'm more familiar with gas engines when it comes to certain things, but if the truck was running fine before the new heads then after it goes to ****. Suggesting there's a problem with the heads, but what if the heads were fine and the compression is low. It wasn't low before and now it is how could that be? what could happen to make the compression suddenly plummet. And if it is the compression then it would account for the problem with the fuel not burning off complete/ flooding or throwing the ratio off.

More than likely with bad rings there would be fuel inside the oil in the pan correct? If there are any other dead give aways of bad rings or low compressioin besides diesel in oil pan or pressuring up the oil, or there would be blowby. Any other thoughts or answers please post.

I'll still be sending my heads off to get checked out and given the thumbs up before maing the call but I'm just curious as to how easily you can lose compression, fine one week, shitty the next.

 

An injector not seated properly from a bad injector cup, or a loose injector... both could cause low compression.