Engine/Transmission (1998.5 - 2002) New Head Gasket No Good in cummins '99 24 valve

[jkeyes]

I just finished rebuilding a '99 24 valve motor and used the new head gasket that came with my rebuild kit, I put it in the truck and fired it up, sounded beautiful until I walked up to the front of the truck and it is shooting coolant out like a jet out between the head and the block just underneath the thermostat. So I removed the head thinking I did something wrong. Everything looked good with the head and the block I checked the flatness in that area of the block and it was within . 0004 across and the head was . 0008 across. So then I started looking at the gasket and where it seals the coolant port in that area it looked as if the port was missing the gasket are, so being the person that I am and I never throw anything away I went and got the old gasket and compared them. The new head gasket in that area was moved in a little more than a 1/4". So I put the gasket back on the block and it sits flush with the block, I removed the gasket and measured from the edge to the edge of the gasket material and got . 265". Then I measured from the front of the block to that coolant jacket it corresponds with and I got . 252", this leaving a . 013" gap between the gasket and the coolant jacket. So being sunday as it is I ran over to Freightliner and showed him the problem, We looked up the two different part numbers and he said the old gasket was updated to this new part number. He went back and grabbed another one and I still have the same problem. Tommarrow I am going over to cummins and I hope they will have a gasket that will go back to the old style.



My question is this, has anybody else had this problem.



Any input appreciated.



Thanks

 

[Joseph Donnelly]

Should be Cummins 3942368 or Mopar 05011876AA.

 

[jkeyes]

Yes, you are exactly right, but when they look it up it crossrefrences over to the new number which is 395..... something. I am at home and do not have the gasket with me so bear with me on the numbers. I will find out tommarrow if they can get the number you mentioned

 

[Joseph Donnelly]

Did they sell you the third gen gasket which is several layers loosely riveted together?

 

[jkeyes]

No, it looks exactly the same as the old one with exception of the gasket material that is missing in the front of it. I will take pictures of it tommarrow and you will see exactly what I am talking about.

 

[jwilliams3]

Maybe its for a 12v?



--Justin

 

[jkeyes]

No I also have a 12v head gasket and thought maybe I could use that but the coolant jackets and pushrod areas have changed considerably

 

[jkeyes]

Here is the old gasket

 

[jkeyes]

Here is the new gasket, notice the offset from the edge verses the old gasket

 

[Joseph Donnelly]

What is the part number of this new, incorrect gasket?



Actually, pushrod areas etc. are OK on the 12 valve gasket. However, it will not seal very well at the water passages in the head along the exhaust side, because the 12 vavle gasket has a steel lip along the edge instead of gasket material and red goop.

 

[jkeyes]

Well they have a different new number for my head gasket and they will have it here tommarrow, they would not tell me why it was different but said they would exchange. As for the 12 valve gasket, you are right as for the push rod holes, but the red goop as you say has changed dramatically. Don't know why I just don't want to be in this stupid thing again six months from now.

 

[Borush]

There was a thread on DTR a while back about a new style gasket that left a water port open when used on an older block. http://www.dieseltruckresource.com/dev/showthread.php?s=&threadid=39717&highlight=head+gasket





Boyd.

 

[TStinson]

Check out the 911 forum - I left a reply there



https://www.turbodieselregister.com/forums/showthread.php?s=&threadid=99994

HELP - Radiator is full of oil ???

 

[A Johnson]

From Quickserve online

Engine Serial Number and Cylinder Head Gasket Part Number Used



45889853 or 56621388 and earlier use P/N 3945803



45889854 or 56621389 and later use P/N 3957650



I assume the serial numbers starting with 4 are Cummins and the ones starting in 5 are Chrysler specific.



P/N 3942368 supersedes to 3945803.



Hope this helps.



A Johnson















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