Thread: Holes above the cam???

G'day All, Wally I had a look in my Wksp manual, it clearly shows the holes but makes absolutley no reference to them at all with regard to replacing cam/bearings, or an open gallery into the block, I think they are blank holes!.
My 2 1/4lt petrol engines have them as well and also in that section of the manual re cam bearings again they are clearly shown but no reference to them, I would suspect that you might have a oil weep from either the under the tappet cover or the oil line to the head and it is just getting trapped there, anyway there are much more knowledgeable people here than me that might be able to shed some further light on subject cheers mate Dennis

so far As ive been able to work out they are holes that are drilled as part of building the block and should be plugged...

Originally Posted by Blknight.aus

so far As ive been able to work out they are holes that are drilled as part of building the block and should be plugged...

Probably for alignment of the block while they are being bored/ honed ?

either that or for bore alignment (drill them down in the right spot and if the gallery that goes across hits em its lined up

or pilot holes to get galleries further down the block...

Going by the 300Tdi (developed from earlier 4cyl landie engines and same/similar cam bearings) they are where the oil ways (for cam bearings) are drilled through to the oil gallery. The bearing shell blocks off the hole on the outer side (hole in bearing shell lines up with the hole on the inner side), but mine were filled with silicone rubber (on outer side).