Hide/Cyl press high, oily valves

[VictorHuge]

Hi folks, been getting a few codes lately along with occasional epc light and based on those i figured worn pcv, injectors, spark plugs and maybe map sensor; coils would be next on the list if that didn’t work. Took off the intake yesterday to change parts out and found cylinder 3 intake to be very oily. I would think the oil suggests the valve seals are going? The car has been burning oil unfortunately and this kinda explains it i guess. I suppose my question is, would a misfire or stuck injector cause oil consumption, or am i right in thinking it’s the valve seals? Added photos of cylinder 1 and 3. Unfortunately all of them are growing a carbon fungus.

I did want to mention the intake removal was made unnecessarily difficult by the fact top outer bolts on the manifold are studs and not bolts. If yours has bolts, make sure you have a stubby offset 17mm to reach the fuel line as you cannot pull the intake off otherwise.

Trouble codes below:
P130A00 - Hide cylinder Intermittent
P03AF00 - Cylinder 3 Pressure Too High static
P006800 - MAP/MAF - Throttle Position Correlation Intermittent
P227900 - Intake Air System Leak Intermittent

 

[VictorHuge]

Anyone have ANY thoughts? Anyone know what it costs to redo the head?

 

[YamR1rider]

I had the cylinder pressure too high /hide cylinder (but at random across all cylinders). Did lots of stuff to include carbon cleaning, replace injectors etc - and it still did it. What got rid of it was an APR tune (probably because it seems to include dialing down an over-sensitive knock sensor a tad).

This probably isn't your issue though given the other two codes and if it's exclusive to cylinder 3, and you are burning oil (no burn at all in my case) . Checking manifold/gasket/hose clamps for any airleaks might be a start, also cleanup map/maf try to get rid of anything which could throw your fuel/air mix off. Failing that, due to the oil burn (any smoke?) could be valve stem seals at which point probably head rebuild prudent. Head/valve cover design a maintenance pain in the ass on these cars but if you can take it off yourself (and are confident re-timing etc) would save a lot then get it away to a specialist head rebuild shop.

 

[VictorHuge]

Hey, thanks for replying! Unfortunately oil burn is an issue, but seems to be less so since the PCV valve was changed. The air leak code also didn't come back so that's a plus.

I see the valves are accessible from the top and the seal replacement is technically possible without removing the head, see this video (for a BMW but similar design)

I'll see if any shop is willing to do it that way. I've done two timing belts but I just don't really get chains.

 

[YamR1rider]

Forgot to mention - it might also be worth you doing a compression and/or leak down test to eliminate the possibility of wear to the pistons/rings/bores being responsible for the oil consumption. How many miles are on the car?

 

[VictorHuge]

Currently ~124000km/77671miles.

Not sure if I mentioned I checked the spark plugs and they all looked great, #3 wasn't coated in oil or carbon, looked exactly like the rest.

The code and misfire has come back a few times but it seems much better