Are the valve springs p72 between pr3 & pr4 Interchangeable?

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Aug 2, 2019 | 04:15 AM

OgulcanTR

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From: TURKEY

Are the valve springs p72 between pr3 & pr4 Interchangeable?

Hi guys,
Are the b series engine p72 cylinder head valve springs the same as pr3-pr4?
( My engine B18A2 PR3 cylinder head )

Aug 2, 2019 | 08:50 AM

spAdam

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From: Boat on a Hill, CA

Re: Are the valve springs p72 between pr3 & pr4 Interchangeable?

You’ve got all kinds of numbers mix-mashed there. PR3 head is a B16A vtec head, PR4 is non-vtec.

A B16A is a 1.6L vtec engine, a B18A is a 1.8L non vtec engine. I have never heard of a B18A2, but you are in Turkey so I don’t know. Please confirm your engine details.

Vtec springs can swap swap between vtec heads.

Aug 5, 2019 | 12:08 PM

civic-steve-94

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From: Blythe, CA

Re: Are the valve springs p72 between pr3 & pr4 Interchangeable?

According to wikipedia the b18a2 non-vtec and found in the 1990-1993- honda integra sedans. From the sound of the post it seems like someone may have installed a B16 head on what is essentially a B18A block(LS Vetc). So if it is a vtec head the P72(GSR) valve springs should fit.