Oil being used

[tommin]

Since our trip up north (see previous threads reference oil blowing/pump leaking), I have managed to sort the pump, so now onto the oil issue.

I have tried just about everything to rule out and get down to the bitty gritty so to speak.
Drained oil and replenished 15/40 mineral.
Fitted new filters (oil and diesel).
Reset timing so many times am getting nightmares??
Removed injectors, had them cleaned then when returned stripped down to find grudge still deep inside which got cleaned (pic).
Compression tested, all seemed to be in the 450psi range, give a gnats whisker or two.
Fitted new PVC.

Initially all seemed fine, very little haze, more on throttle with some darker brownish smoke thrown in for good measure. Then after a short trip up the road, the blue haze just came back, especially when revved?

Where to next?
Could it be turbo (how to check that out?)
Could it be valves(how to check those out?)

I am at the end of my tether now

[tommin]

Well I have been busy searching finding ways to do things, but still scratching my head.

I did toy with the idea that as I believe it could be down to faulty valves on cylinder 4, to swap the head with that from the spare engine I purchased, that was until I opened the spare engine to find this -

and on closer inspection these -



Needless to say I will not be using this head as a replacement.

I suppose it is time to take the head off my engine, to see if it is indeed those valves and replace them as needed.