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Casting numbers,codes and markings on head

Alf

By Alf,
in General Maintenance

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Alf Proficient

Alf

Posted
Posted

I'm trying to identify whether my 25 head is turbo or not.

I keep getting conflicting information on what's what and no one has been able to tell me how to indentify a bare head.

Every manufacturer has a number or some code to distinguish between their parts. Does anyone know what the following mean?

The pic below shows the front of the head.

headid1.jpg

Going by how Nissan date their other skyline parts, the 10 would be october?, the 4 would be 1994?

The I, I wouldn't have a clue...., the same I is also on the back of the head but on the inlet side.

The pic below shows the exhaust side of the head.

headid2.jpg

This I have no idea what it means.:confused:

PS: if you guys have pics and or can get the numbers/letters of ur heads that would be great ie state what model, head etc.., A reference that could come in handy for us all.

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