6.9 vs 7.3 Head Gaskets and Boost

Thewespaul

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I haven’t messed with the extra thickness gaskets, I try to keep compression as close to stock and with the poor results with the extra thickness copper gaskets I worry about having similar issues with a lot of cylinder pressure.

Part numbers for turbo gaskets are F3TZ-6051-A and E8TZ6051A
 

Thewespaul

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Reason for not just drilling the gasket is the metal stake layer in the gasket, when you drill through that layer it tends to tear which mushrooms the gasket and disturbs the grey sealing layers on either side of the metal. Using the cookie cutter method with the press it makes it a lot cleaner. The red circle is cut out with the die, blue is with a small drill bit, and directly to the right is a normal coolant port that you can see looks very similar to how the die cut port is formed.
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Fision

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I just received a set of F3TZ-6051-A. NOS from eBay. They do look like OLD stock. The fire rings seem pressed onto the gasket, but loosely; no bond. I don’t know if that matters.
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The package wasn’t sealed, so I’m not even sure if these are the legit IDIT gaskets or not. The seller does have a few more sets if anyone’s interested.

Edit- one of the numbers stamped on the gaskets (1816689C1) matches a different part number. So if the two numbers Wes posted are the only legit IDIT gaskets, these ain’t them

Edit #2- the seller got back with me and has 3 unopened f3tz-6051-A sets. He checked the gaskets in those packs and they all have the same 1816689C1 number stamped on them. So, I dunno. I’ll hopefully get a chance to measure the fire ring tonight to see whether these have the NA or turbo ring.

Edit #3- put the micrometer to the set from eBay as well as a pair of Victor Reinz gaskets. Both fire rings are about 0.1”.
So, unless I’m doing something wrong, which is more likely than not, gaskets with 1816689C1 stamped on them are NOT IDIT’s, but they may be sold in original packaging labeled as IDIT.

Wes, is there a number printed on your IDIT gasket?

and Wes, thanks for bringing up the issue with drilling these. To be honest, I thought the hole you drilled looked pretty good; until I looked at the one you did with the punch. Very clean. And I like the P-pump backdrop:Thumbs Up
 
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Goose_ss4

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Idk if it matters but I torque my studs to 150 ft lbs

I think that was consensus on with r&d
 

aggiediesel01

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I don't know if this is anything but anecdotal information but I was surfing through NMB2's (the other Justin) photo bucket for his red truck and he had a nearly identical failure except on the passenger side. I don't know if he ever described the situation in a thread somewhere on the web but it was interesting to see another highly boosted engine (I think his was a 6.9?) with a failure in the corner. It looks like he was using 6.9 Gaskets but I can't tell if he had the insert in or not.

https://s818.photobucket.com/user/NMB2/media/OBS CrewCab DRW/IMG_3244.jpg.html?sort=3&o=302
 

Thewespaul

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Youre right, that failure looks strikingly similar, if I remember right that truck was running a four plunger pump at the end of its lifetime, not sure if that was after this failure or not. Does look like a 6.9 looking at the block surface, wonder what kind of boost he was seeing when it failed.
 

aggiediesel01

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The first turbo on that motor I'm pretty sure was an S362 but I don't know the details. In that album he's got several maps for it. At some point he went to a bigger one but I didn't see the size referenced. I believe, based on some old posts I read, his pump was in the 180cc range and he was saying over 135cc at the top end. I think he ran his DB4 hybrid the whole time on that motor, I think Racin was the one switching back and forth as he figured more out about them. There's also a pic of a cam sheet in that album which I assume is for his J2 cam. There's close ups of the pump and 1st turbo late in the album. No idea on boost but his videos and discussions were always about 25-35lbs being run through his motor, for as long as it lasted.... Though, as far as I know it was still a running motor when he pulled it to do the cummins swap. He's a smart cookie, too bad he was so hard to get along with and so many guys were so antagonistic toward him.
 
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