Blown Head Gasket On The Eth

[kevin1]

Thats right mine blew the other day when I was testing out the PM3 comp. I know some of you have had this problem did you put a thicker one in or just replace the oem gasket? Yes it blew totally drug free also I will be tearing it down today any help would be greatly appreciated WIZ1

 

[MikeR]

I don't think thicker headgaskets exsist for the any of the 24v's yet.

 

[Bigsaint]

Sory to hear, Wiz.



Scott W.

 

[HVAC]

OH NO!!!

You broke your truck?



There is a thicker head gasket available. You will need to use a thinner copper washer on the injectors to keep the same spray pattern.



Will you be at the Erb Brothers shop today? I'll call you about a few things I've done. I have a head being ported and it will be o-ringed. From there you would use a copper gasket.

 

[Todd T]

always a step ahead arent you HVAC?



you're the man!!



are you using actual O-rings and copper gasket like a blower setup or a wire lock head gasket?

 

[work2muchplay2little]

Hey wiz, sorry to hear about the trouble. I guess it's a chance to build it better than before. BTW, what were the conditions at the time it went? Boost, rpm, fueling level, etc..... you know for the collective knowledge base. Thanks!

 

[HVAC]

12v Head Gasket Same As 24v

I haven't closed the book on this but I'm going to announce right here and now that the 24v will use the same gasket as the 12v. Think about it, why wouldn't they??? The block is the same, even though I did see a guy back east refer to one engine as having a 12v block Let me ask you this, if you have a 12v engine and you slap the 24v head on it, which head gasket do you use??? Hmmmmm? It's the SAME gasket!



Nobody told me this, it just fits. Cummins doesn't list a thicker gasket for the 24v engine. Just use the 12v gasket. Get it in a . 020 thicker size and drop the compression about . 5. I have a couple spare heads laying around and I'm marching over to Cummins to compare the 12v gasket with the 24v gasket. I predict there is no diff.

The point is, you can get a thicker gasket.



I'll double check this and report.

 

[HiPerf360]

I think you are full of it Nowel! LOL... Just kidding, how is that twin setup coming along? Will you be producing it for the public? I will have to address the turbo issue soon.



Thanks

 

[John]

I believe Nowell is right, the 12v block and the 24v block are one in the same. If you remove the heavy-duty (24v) OE lift pump mounting bracket you will see the opening in the block for the 12v mechanical fuel pump... that thick bracket also doubles as a block off plate.

 

[kevin1]

well im not sure at what point it actually let go but I do know that it was at 45 lbs of boost with the pm3 on kill and I was pushing it in a race type situation the combo of the pm3 and the ez really brought the truck to life but also showed a weak point in the system... ... (for bigsaint) it blew the oil jacket on the #1 cylinder and pushed the oil out the front of the head. Thats the price you pay sometimes pushing the envelope oh well just a little head job I think next time I feel like that I will call my wife

 

[Vaman]

Didn't someone post a difference between the ETH and ETC head gaskets?

 

[HVAC]

This Just In

I believe we can close the book on this one now. The only difference between the two gaskets is a slight variation in the water jacket opening size. I don't see where a problem exists. I know of one Ram with several thousand miles on the 12v head gasket, no problems.



If I owned the ETH I would go with the 12v gasket to drop the static compression.

 

[Bigsaint]

Very interesting Nowel, thanks



Scott W.

 

[Vaughn MacKenzie]

Thanks for the verification Nowel. This subject came up on the 12v forum some time ago and there didn't seem to be a clear answer . At some point I may pull my head and upgrade the gasket and get some port work done while I'm at it. It would be interesting to see what if any benefit could be found by smoothing passages and opening them up a bit. It may not do a lot for average guys but for those who are BOMBed a bit as you are may see some benefits . While it's nice to have 4 valves per cylinder, they look kinda small to me, especially when you're running double the normal boost levels.



Nowel, is this head you are porting going on the lil' Red Rocket??



Vaughn

 

[Joseph Donnelly]

The 12 valve and 24 valve head gaskets differ in the hole sizes for coolant flow. Presumably these differences are needed for proper cooling of different parts inside the heads. The 0. 020" thicker head gasket should drop compression about 1. 2 points--on a 12 valve, from 17. 5 to 16. 3. I have looked at both gskets but it did not look simple to modify a 12 valve gasket to give the same coolant flow patterns of the 24 valve.



Cummins Recon is the main reason for the existence of thicker head gaskets. Cummins wants to restore a remanufactured engine to design compression after milling the block and/or head. Check the Cummins parts dept because the 24 valve has been around long enough that Recon's needs will soon bring (or may already have brought) about a thicker gasket for these engines.

 

[kevin1]

well today it will go back together finally got all the parts first cummins sent a 12v gasket set then they sent the right set but no new head bolts so today I will put the engine back together. The gasket blew right at the very front oil valley for the head the oil comes out of the block then transferrs back about 1" then up into the head thats where she blew. strange

 

[CUMINNTSTRKN]

that's the problem with our current turbo's. when the turbo is wastegating, it only vents the back 3 holes so the front 3 have higher boost. i hope she goes back together okay.



jim

 

[KWIKKURT]

Originally posted by CUMINNTSTRKN

that's the problem with our current turbo's. when the turbo is wastegating, it only vents the back 3 holes so the front 3 have higher boost. i hope she goes back together okay.



jim

GOOD POINT!



CUMINNTSTRKN, is what you meant to say is the front three have more backpressure on them from the turbo only wastegating the rearhalf of the manifold. They all have the same boost pressure coming in but since the backpressure is greater on the front three they will run hotter and higher compression. AND less HP.



I agree that this issue is a performance issue & it cannot be good to unbalance the engine cylnder pressures at the high HP figures that some are running.



Did I mention My new B-1 Bomber Turbo currently in R&D has a Dual Ported wastegate to keep the engine exhaust manifold pressures equal. That has to be worth a little more HP?





Kurt Yardley

[Mild To Wild Diesel Performance Products]

 

[Brandon]

bla bla bla pooooooooooor "little" wiz bang... ... ... ... .....







thats funny "little" he he he





I'll race you now wiz bang... ... ... ... ... ... ... ...



Brandon

 

[kevin1]

THE TRUCK RUNS ONCE AGAIN!!!!! With some slight modifications of course