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Missing Rb26 Cam Caps, What Can I Replace Them With

Dj laBBy

By Dj laBBy,
in Engines & Forced Induction

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Dj laBBy Collaborator

Dj laBBy

Posted
Posted

Hey guys, I bought a "complete rb26 head" that didn't have the cam caps for it. I didn't realise it didn't as the cam covers were all on, so didn't worry. A week later, i pulled the covers off and noticed no cams caps!! I asked the bloke about it but he pretty much just fobbed me offand couldn't get a refund, so i'm left with a lump of expensive ally pretty much.

I was wondering however, if you can use rb20 or 25 or even custom caps(if anyone makes them).

I'm not too sure about all this. I guess i probably could, but it would need to be line bored.

Is this correct??

Any sugestions??

Anyone have any spare caps??

Thanks guys

Swiper the Fox Grand Master

Swiper the Fox

Posted
Posted
Hey guys, I bought a "complete rb26 head" that didn't have the cam caps for it. I didn't realise it didn't as the cam covers were all on, so didn't worry. A week later, i pulled the covers off and noticed no cams caps!! I asked the bloke about it but he pretty much just fobbed me offand couldn't get a refund, so i'm left with a lump of expensive ally pretty much.

I was wondering however, if you can use rb20 or 25 or even custom caps(if anyone makes them).

I'm not too sure about all this. I guess i probably could, but it would need to be line bored.

Is this correct??

Any sugestions??

Anyone have any spare caps??

Thanks guys

i may have a full set of cam caps and bolts...ill check tomm. pm me an offer for the full set...do you need the baffle caps as well?

proengines Rising Star

proengines

Posted
Posted

You can use caps off any RB head but you will need to have the cam tunnels bored once you fit them. The caps are not interchangeable unless you do this, they are bored as an assembly at the factory and a set of caps will only work properly on the head they came on on unless the tunnels are remachined.

STATUS Grand Master

STATUS

Posted
Posted (edited)
i may have a full set of cam caps and bolts...ill check tomm. pm me an offer for the full set...do you need the baffle caps as well?

surely being an engine builder you know it's not that simple to do it properly.....

Edited by URAS
  • 5 years later...
Mimesis Newbie

Mimesis

Posted
Posted

You can use caps off any RB head but you will need to have the cam tunnels bored once you fit them. The caps are not interchangeable unless you do this, they are bored as an assembly at the factory and a set of caps will only work properly on the head they came on on unless the tunnels are remachined.

Sorry to revive a thread but I am in almost the exact situation as op. Is this above statement true?

MJTru Mentor

MJTru

Posted
Posted

Yes i agree. We call it line boring over here. Wit an old rb in the pass i used some gapping tape to make sure it wasnt tight. And i took one from an old head. Still working to this day. But that was a old nissan laurel. Still running today. But if your going to be racing/ beating the motor it will need to be line bored. Same goes for main caps. If one was missing. Nissan is ok with there clearances from factory. Still good practice to do it the right way.

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