Setup

H22
mahle pistons
skunk2 cams
pnp head
etc.

So onto the issue.
Vtec will blip on, then disengage. I know it's low oil pressure to the rockers. We tested the oil pressure at the back of the block (90 psi above 3k) the problem we're seeing is that when we test the pressure at the head(the port on the front of the block) we're only seeing 20psi at 5000 rpm. Testing it as described in the honda book, solenoid wire to 12v+ and revving it up. Swapped a known good solenoid in, same issue. The next step i'm thinking is checking the oil control orifice under the middle cam cap. Other than that i'm lost. Unfortunately, it was built by another shop, and sent on its way with the customer, as he was moving 3 states away.

Aside from what I described above, does anyone have any other ideas, or experience with this?

Thanks in advance

 

any catch can?

 

middle cam cap o-ring

 

no catch can


oil control orifice under the middle cam cap is the next spot i'm looking

 

X2

 

who ever built it might have put the oil restricter in the top of the block that comes on the h23 i just had a machine shop around here do the same thing and your supposed to take it out in the h22 to make the vtec work but i would check the o ring in the middle cam cap first.

 

on an h22, the oil orifice is in the head under the middle cap, not just an o-ring. but ya, thats what we're gonna take apart next

 

If you've got it that far apart, might as well check the oil control orifices on the ends too. I've seen them reversed (not that it would cause your vtec problem). If they're missing, that could potentially explain it. Doesn't that center orifice control oil pressure to the cam journals? Really though, it would have to be an obstruction in the port in the deck of the block. If you look on the back of the head you can see the oil passage that goes from there to the VTEC solenoid. So if you have 90psi on one end of this passage and 20 on the other... What if you remove the pipe plugs where that passage was drilled and blow air back from the solenoid? What is the pressure at that point (corner of head by the thermostat)? I'm working from memory though, good luck and let us know what you find.

 

I know the pins that hold the rods are not missing. we threaded a bolt into the rod to see if we could pull it out, to specifically test that. am curious if the orings around any of the pins/orifice are good.

 

does it still have the Balencer shafts?
ive heard if those are missing it can cause oil pressure problems

 

balance shafts are installed.

 

call me

 

i have seen this before.

as someone already stated you need to check to see if someone mistakenly installed an h23 orifice into the deck.

btw, there is no oring under the center cam cap like a b series. the only orings are around the orifices themselves.

 

thats what I was trying to say, the orings around the pins and orifice.

 

he is talking about taking the head off which is what i was talking about not under the cam caps there is a oil restricter in the block under the head on h23 some times people mistaken them and think they go in h22s to they dont. if you no how to check the oil pressure properly you should be able to check and see if that is in there with out pulling off the head.