Physical indicators that show one has a Type R head?

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Apr 12, 2018 | 04:07 AM

JDM_ego2033

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From: NY

Physical indicators that show one has a Type R head?

i have a b18c1 bottom end and was told the head was Type R. It says pr3-4 and I believe it was made in 1990 but I could be reading the production date wrong. I don’t see green paint by the distributor but I know the engine was wire brushed and painted so I don’t want to go off that. Is there any other way to tell and if it’s not what is it actually and the difference between this one and type R?

Apr 13, 2018 | 12:17 PM

sanimalp

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From: Thornton, colorado, usa

Re: Type R head?

There is no way to tell from the casting number. PR3 is the casting number for many of the DOHC VTEC engines. the - number is the casting mold version #. Green paint has been a reliable option to distinguish them. The only other way is to assume it has OEM cams and measure them out, then compare cam details. that can narrow it down, but only if you know the cams are original.

Apr 14, 2018 | 11:41 AM

JDM_ego2033

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From: NY

Re: Physical indicators that show one has a Type R head?

THAts where myproblem comes in is the engine isn’t oem internally. I but the circle codes by the left of the headers starts with a “ 9 0 “ so I’m assuming it’s made in 90. Would that mean it’s not type R or is it still possible? It’s been driving me crazy and everyone I ask says something different and no one is technically wrong. It’s hard too tell

Apr 14, 2018 | 12:55 PM

TheShodan

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From: City of Wind, IL, USA

Re: Physical indicators that show one has a Type R head?

Quote:

Originally Posted by JDM_ego2033

Show a photo, please.. All this vague description is confusing. Type heads weren't developed until 1995 for 1996 production cycle start. The standard B16As have been around since 1989. You more than likely have an old B16 cylinder head. A Type R head only has the valve channel bowl work performed, and dual valvesprings from the factory. There was no unique stamping or exterior markings of a Type R head