how to tell the differences between B16A vs B18C7 head

[patsdc2]

Hi, I am about to make a purchase, just wondering how to tell the differences between b16a vs b18c type r head physically, photos would be good. just so that I have an idea of what I am actually purchasing as the seller isn't too sure as well. thanks a lot for your help

:D:thumbsup:

[90LAN]

it is stamped on there the head code pr3 b16 and p72 b18

[patsdc2]

wrong... b18c7 type r head isnt p72, but pr3 as well. anyone else? thanks :D

[90LAN]

oh well my bad u seem to know the answer anyway
pr3-2

[bennjamin]

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.

http://www.honda-tech.com/showthread.php?t=898679

BTW if you have a bare head thats a b16a2 or b18c7 there isnt really a way to tell what it is apart from opening up

[Slaz]

The type R head will have had hand finishing on the ports as per Bens post, so look for de burring within the port tracks, also, these heads were less common for having core shift which was a problem with the Honda casting, in saying that, ive seen type r heads with core shift.

Other then that if valve train is installed, bigger LMA's are installed along with different valves.

[patsdc2]

a friend of mine who has b18c7 told me that his mechanic said the main differences would be the hole where the radiator hose goes to or something, it is different compared to b18c2 AUDM VTI-r and b16a. another friend sent me a photo of what he thought to be b18c7 head (according to his mechanic) but hes also not too sure on how to tell

here is the pic that he sent me =

http://img10.imageshack.us/img10/4396/enginein.jpg

oh just to add an info, this head in the photo says PR3-3

added photos

B18C2 head photo

http://i21.photobucket.com/albums/b279/vlturbz/PIC_0516.jpg


B16A2 head photo

http://img502.imageshack.us/img502/7078/aaaaaa.jpg

let me know what do you guys think

[Slaz]

Once again the type R head and the B16a are the same apart from internal differences and the same water inlet, the P72 head fitted to the B18C2 has a different water inlet.

That doesnt help you know if it is a type r or not.