I pressed here.....
The engine is constantly burning oil.

Yesterday a friend of mine looked into the cilinders with a camera, all is dirty with oil in the compression compartment, he noticed that the honegrooves are maybe to deep/big.





Difficult to see on a picture beqause the grooves look bigger then in real, still they are big, i noticed that allready myself.
How big can they be?

I used pistons from Mahle, size is 82.98, bore size should be 83.01

Allready started that, when i removed the inletmanifold i checked the inlet valves and i could not believe my eyes, there was a big amount of oil at the top of the valves!
I think my seals have come loose from the guide, when i placed the seals i used a bit of oil, i think that this is the reason.
But it is a bit to early to say this beqause i cannot see the seals through the springs, tommorow i have the tools to remove the valve springs and hopefully i can fix the problem.
Valve guides are from Kolbenschmidt and seals from Elring, good combination?



To be continued........

Yes i did, with a self made tool for guidence.

I don't understand your question sorry
I did lapping by hand ,do you mean that?

Today i found what is causing my problems, the valve guides are not deep enough in the cilinder head, the upper valve spring washer hits the seal and damaged them.

I need other guides beqaususe i can not lower them more, i putted them as deep as possible , guides seems not fitting for these engines.

At the pictures you can see the differance between the old and the new guide.





When i putted them in i reamed them with a 7mm hand reamer and i lapped the valves by hand, same as the instruction from Bentley.

Why should it be not sufficient, valves and valve seats are fitting perfect now.

Engine is running again, i lowered the valve guides and put everything back together, i drove 400km now and it runs great, the engine used 100ml oil and that is something i am not so happy with.

I have some doubts about the oil i used, i put in Mobil 1 5W50 and i noticed that the oli temperature is higher than the cheap oil.
For example: i drove 140km/u at an outside temperature of 18 degrees, oil temperature rises to above 100 degrees.
Could it be that the oil is to thick for a new engine? Maybe it's better to take 5W30 or 0W40?
Probably the use of oil will rise when i put in this oil and i don't want that either.