So i started to check the RB30 i have bought to see how it was looking inside and the type of treatment she had been given.
Firstly i drained the oil obviously-now altho it was quite a dirty black in comparison to the black i usually drain out of my RB20, but overall the oil was not sludgy nor were there a single trace of metal filings that i could find using a filter (not the finest one i mite add).
Next i removed the sump, checked her out and she looked all sweet with still no metal traces anywhere in tthere nor on the oil pickup filter which protrudes into teh sump.
At this stage this exposed the heart of the 30 The rods, crank, and bores (not that the bores werent visable before haha). The rods look fine, the crank looked perfect except for one area under piston #2 (i think) which had a bit of discoloring to it...not sure what this was but from the pictures you can sort of see the discoloration. Just wondering whether this is all normal or i should be concerned.
Aswell as this, i did notice some hatching/cross hatching of the bores as you can see in the picture attached, just wondering whether the more technical people have some input into any probs i could be facing or the things i can do to fix the problems. Chances are im taking it to a engine bulider to replace all bearings, rings, crank drive collar, welsh plugs and rod bolts, then balancing the round and round/up and down bits.
Just wanting some input of peoples experiences on the buildup
Cheers, David