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Discussion Starter #1
May 13, 2015

In light of the numerous threads, posts etc. asking “what head gasket to run” with no solid answers, we decided to try and gather all the information we could about each gasket in question. This is intended to give everyone as much information as possible so that they may make their own informed decisions. The details below are of each head gasket that were measured and used, complete with measurements, pictures, and our observations.



It should be noted that the measurements of each layer of the gaskets were done on bare metal, and noted where the fire ring was present. ALL gaskets used were 18mm, for consistency’s sake. All 4 gaskets were sourced from 4 separate suppliers to ensure nothing was biased. All gaskets were labeled as the top (1st) layer being the layer with the part number; all other stamps are noted on the layer they were found. All gaskets were measured by 1 person to ensure consistency in human error, and all measurements were taken and are to be read in inches.



(NOTE: Page 2 is not an image, as it is the introduction written above. It is page 2 in the full PDF of this write up.)























Summary of Head Gasket Comparison

In summary, we noticed a few things:

Between 2012 and 2015, Victor Reinz has notably changed their gasket manufacturing. Two main changes are observed, the first being the measured thicknesses of each layer of the gasket, especially the 4th layer fire ring. This contributes to the difference in the overall thickness of the assembled head gasket as well. The second change is the absence of a completely sealant covered gasket layer; present in 2012, and now absent in 2015. These differences, when compared to the Black Diamond and River City Diesel Platinum gaskets, gives credibility to the idea that these (in addition to OEM gaskets) are all manufactured in the same place.

The Black Diamond, River City Diesel, and OEM gaskets all contained the stamped part number 6237557 on the second layer.

The Black Diamond and River City Diesel gaskets both had the part number 54450A VR This part number was the same part number found on the old Black Onyx head gaskets.

All 4 gaskets had sealant on both sides of layers 1, 3, and 5. Layers 2 and 4 were bare metal with no sealant present. Layer 4 of each gasket had a fire ring.

The Felpro gasket was the only one that contained copper inserts in the push rod holes.
The measured thickness of the Felpro 4th layer fire ring is also worth noting. The 4th layer fire ring measured at 0.0188. This is important in our opinion as the fire ring’s “fold” creates an area where more clamping force is applied, resulting in a stronger more complete seal. This most likely is important in how well the head gasket seals, lasts, and should actually perform better than all the other gaskets.



Final Comparison Chart:
 

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WOW, nice work :thumb:
 

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I don't remember who it was, but someone did it years ago when the black onyx gaskets started showing problems over OEM. But nothing has been done recently after revisions had been made.
 

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Discussion Starter #6
I don't remember who it was, but someone did it years ago when the black onyx gaskets started showing problems over OEM. But nothing has been done recently after revisions had been made.
The lack of complete info on the market, and that thread, spawned this thread. :)
 

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Well it has been much needed info for a lot of people. I think at this point most of them are pretty much the same with the exception of the felpro, the problem I have with any "testing" is there is no way to test them in a real world application. However this info gives people a good baseline to make an informed decision based off of their build and hp goals in mind.
 

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Fantastic job, sticky worthy?? :nod:
 

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i can't wait to see the pictures locked out by my work's firewall.. good writeup from the text though!
 

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years past found felpro was the best when used in our 16+ to 1 CR dodge 225CID six with some help in spraying with a red colored HighTack from Permatex :eek:hnoes: https://www.google.com/?gws_rd=ssl#q=high+tack :eek:hnoes:

this engine loaded with a auto @ 2,300rpm to 7,500rpm the HighTack held so fast the only way to get head off of block was to take and turn head bolts a turn out before backing off the valve rockers letting the valve springs pull the head off of the block:dunno:

in a car 3,500 ran 13.00's apx 375/380 HP :woot:
 

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Discussion Starter #17
I was just wondering if u had to buy all of them or if the vender help you out bc that would be petty cool of them. if you did thank it good info
This was purely for informational purposes, and involving outside vendors would have felt like it was "tainted" info. The gaskets were purchased like any other customer would. ;)
 

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Good stuff!!

Thanks BPD and Pinky!!!:beer:
 
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Thank you for doing it the way you did, sounds like you were fair to all, and you let
the numbers speak for themselves'.
Doug
 

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:clap::clap::clap:
:noteworthy:
I figured if Fel-Pro made the effort to get in the game as late as they did, they probably had something figured out.

Thanks for doing this.
 
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