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post #1 of 4 Old 07-28-2021, 02:30 PM Thread Starter
OCDXJ
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Head question

I am changing my valve cover gasket and was trying to see what head I have, the dreaded 0331 or a Tupy, the only casting I can find is NH4 and 00 see pics.

Is this a good head or not?

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01'XJ,4.0l,AW4,NP231,D30,CHY8.25,3"IROlift,Bilstei n's,IRO OTKsteering,245/70R16,NokianRotiiva AT
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post #2 of 4 Old 07-29-2021, 12:56 AM
Ralph77
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The TUPY would be clearly visible so going to guess you don't have one of those.
The 0331 on a original head is visible on the outside edge with the valve cover still on if I am not mistaken so....
I believe it to also be visible the same way on a TUPY 0331 head.
No idea what kind of markings would be on an aftermarket, like a Clearwater, head.
It won't let me post a link for some reason but there are some shots here that might help.
For TJ's though but still.

https://www.google.com/search?q=tupy...hrome&ie=UTF-8

Click on the How to identify 0331 or TUPY head | Jeep Wrangler TJ Forum posting.
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post #3 of 4 Old 07-29-2021, 07:50 PM Thread Starter
OCDXJ
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Quote:
Originally Posted by Ralph77 View Post
The TUPY would be clearly visible so going to guess you don't have one of those.
The 0331 on a original head is visible on the outside edge with the valve cover still on if I am not mistaken so....
I believe it to also be visible the same way on a TUPY 0331 head.
No idea what kind of markings would be on an aftermarket, like a Clearwater, head.
It won't let me post a link for some reason but there are some shots here that might help.
For TJ's though but still.

https://www.google.com/search?q=tupy...hrome&ie=UTF-8

Click on the How to identify 0331 or TUPY head | Jeep Wrangler TJ Forum posting.
Thanks Ralph

01'XJ,4.0l,AW4,NP231,D30,CHY8.25,3"IROlift,Bilstei n's,IRO OTKsteering,245/70R16,NokianRotiiva AT
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post #4 of 4 Old 07-31-2021, 12:47 PM
Wyo
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Quote:
Originally Posted by Ralph77 View Post
The TUPY would be clearly visible so going to guess you don't have one of those.
The 0331 on a original head is visible on the outside edge with the valve cover still on if I am not mistaken so....
I believe it to also be visible the same way on a TUPY 0331 head.
No idea what kind of markings would be on an aftermarket, like a Clearwater, head.
It won't let me post a link for some reason but there are some shots here that might help.
For TJ's though but still.

https://www.google.com/search?q=tupy...hrome&ie=UTF-8

Click on the How to identify 0331 or TUPY head | Jeep Wrangler TJ Forum posting.
Here is one of my actual tupy heads showing both the external 0331 and the internal TUPY cast marks;


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