GsrRex88

How do i tell the difference between a 1st gen B16 and a ITR head installed on a B18C1 bottom end, without taking it off?

-Eric

91_Hulk_Si

Use some engine degreaser and look for factory marks on head. Then find out what the F those serial numbers and marks mean.

92lx

basically what 91_hulk_si said, it's kind of a pain, but it'd be worth it likely.

- Nathan

GsrRex88

i have green paint on the dizzy mount
heres a pic


and the numbers between the 1st and 2nd exhast port are..
79 01 32 09

-Eric

Kai

GsrRex88: does the ITR head have a PR3 casting code or a P73 code? I have been suspecting that they are stamped P73, but have no confirmation. Look on the head right above the exhaust manifold, it'll be cast right in there (assuming you didn't know )

If the ITR does have a P73 code, it would make it pretty easy to tell.

GsrRex88

Nope both the B16 and ITR heads have the same PR3 Casted into them.
I found some green paint on the dizzy mount, so im pretty sure its an ITR head.
The P73 code is for the GSR head.

-Eric

Kai

The B18C1 GS-R head is a P72 casting. The one I had for a short while was actually cast "P72-1"

P73 is the code for most ITR parts, like the pistons. I was just hoping that they actually cast P73 in the head instead of sticking with the PR3, but I guess there is no such luck. That would make things too easy, I guess.

GsrRex88

yeah sorry about the P73 thing, i get confused alot with all these codes im trying to ram into my brain in such a short time.

-Eric, i do remember P73 on most ITR parts but, the head is stuck with a Pr3, and the green paint on dizzy is the only way to tell without taking it apart.

O well ive got green paint!!

Thanks,
Now to upgrade to ITR pistions.

-Eric