Casting marks on the head? What do they mean? PR3-X
05-08-2009, 01:07 PM
#1
Casting marks on the head? What do they mean? PR3-X
Hey guys I have seen type R heads with different stamps in the casting. It says PR3-X. The X can be a number like 2 or 3 or maybe something else. Does this mean anything as far as a type R head is concerned?
05-08-2009, 01:32 PM
#3
Re: Casting marks on the head? What do they mean? PR3-X
Thanks I found this in a search just now too
PR3 is the head ID #. The folowing number, either 1 - 4, is from what casting it came from. I've seen ITR heads have every number, 1 - 4, and many different b16 years have different #'s following the ID #...example, my b17a head was PR3-2, my '92 JDM Xsi B16 head is PR3-1, my '00 JDM ITR head is PR3-4, my '97 USDM ITR head is PR3-1.
...There is no way to tell from the ID # and casting # which model/year/make the head came from. The only sure fire way to determine if the head is actually an ITR head is the green paint behind the distributor, which is the paint they slab on there in the factory when they select the best looking ones to go out for machining, and the minor portwork on the intake ports, and larger intake valves.
...There is no way to tell from the ID # and casting # which model/year/make the head came from. The only sure fire way to determine if the head is actually an ITR head is the green paint behind the distributor, which is the paint they slab on there in the factory when they select the best looking ones to go out for machining, and the minor portwork on the intake ports, and larger intake valves.
12-26-2009, 11:08 AM
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Re: Casting marks on the head? What do they mean? PR3-X
my head has pr3-1 on it... the casting date says it was made in december of 96. is it safe to say this is a jdm itr head?
12-26-2009, 11:37 AM
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Re: Casting marks on the head? What do they mean? PR3-X
^ i read on another thread whatever year your head says its from the year after...so for example yours says 96 so its from 97... i dont know correct me if im wrong
12-26-2009, 07:50 PM
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Re: Casting marks on the head? What do they mean? PR3-X
well usually as far as productions dates go if it is made before june (eg. 2-5-01) it would be an 2001 if its after june of 2001 it is 2002... im pretty sure my head is a jdm itr but just asking to make sure...
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