jyeung528

I copied and pasted this post from another thread regarding oil consumption...it is the first time I heard of this...haven't checked between ap1 and ap2 valve cover/pcv valve, but i figure it is true...

anyone try switching to an ap2 valve cover/pcv valve with improvements in oil consumption?


With the AP1 model , the pcv valve sticks into the valve cover vertically. The inserted tip of the valve is less than 1/2 inch from a steel baffle plate. This plate tends to pool oil on the pcv side of the valve cover when you car is in right hand sweeper. Depending on the aggressiveness of the turn, it is at this orientation that allows the valve to siphon oil directly into the intake. I've seen the smoking at the track.

Honda redesigned the valve cover and pcv for the AP2 models. The AP2 pcv valve screws horizontally into the valve cover; positioning the tip 90 degrees away from the baffle plate thus increasing the distance from where the oil would usually pool. This fact plus a re-metering of the new valve reduces the chance of oil sucking into the intake resulting in reduced oil consumption and fuel contamination. Not too many AP2 owners complain of oil usage.

Thoughts, suggestions, ridicule?

Stratocaster

I changed mine long ago. I can tell you that my current motor (I have had more then one) burns next to nothing. Even with track usage.

jyeung528

and this stoppage of oil consumption occurred immediately after you changed the valve cover?

wow...i am surprised this has not been mentioned before on s2ki.com!!!! considering the ap2 valve cover has been around since 2004!!!!

slvrap1

Very interesting, has anyone else tried this ?

mxt_77

Are the valve covers a simple swap? I was thinking there was some sensor that you had to change, too.

F20_C

I thought the years with DBW had some extra components.

Stratocaster

Actually they have less components. They have only one TDC sensor and all other years (00-05) have two.

Yes, the swap is easy. You have to swap the TDC sensors (two) from one cover to the new cover. You need to have a new PCV valve as the 04+ covers use a differant type of valve. It screws in instead of pusing in a grommet.

Stratocaster

No not for me. My motor was going bad, I had a broken piston ring at the time. Took about 1 year before the motor generated a noise that caused me to swap motors.

I think it is part of the oil issue for the early cars, but not the end all be all.

iam7head

i am willing to say it's helps but it's not the end of the "quest" here.

i have a inline filter on my pcv route and it catches about half a thump worth of oil between 3k(which is oil change for me), i burn about half a quart between change(mostly less than half a quart), i think the extra oil just get burns off because the pcv is not catching everything.

TwoRs

Is this a "must do" for a track day?
I have a '00, stock with RE-01R's and am doing a Barber HPDE in March.