So I was doing valve adjustment on my b18a1 the other day and noticed that the cams did not have any markings on them other than engraved "r1" on intake cam and "r4" on exhaust cam. Now when I got this car, previous owner wouldn't shut up about how this engine has cams etc. Well I was very doubtful and never believed him, nor I do now. Just curious to know how to identify stock cams?
I spun both cams around as I was doing valve adjustment and did not find anything else other than what I mentioned above.
Also found it weird that all exhaust valves were at 0.08" (spec) and intake valves were at 0.12". So I corrected all intake valves to 0.05" (according to haynes)
Any help would be appreciated.
Martin

 

If its an aftermarkt cam, there should be a marking of the manufacturer

like skunk2 cams have s2p2 marked on them. and spec c have c2 marked on them.

or

EXACT Stock 3g and b18 Camshaft Specifications - Preludepower.com

 

Yeah I read that thing a while ago.

Though I could measure the lift at tdc, the profile of the lobe could be different.

 

Im sure sumone will tell you soon.

 

Theres no markings at all? Of anything?

 

Just "R1" on intake cam and "R4" on exhaust cam. Otherwise nothing.

 

r1 and r4 is oem

 

Skunk 2 does not make any cams shaft for non vtec engine's.

 

I was just making an example of lableing.