A lot of cleaning going on this weekend and the final piece of dismantling which was to remove the pistons from the con-rods thus enabling the top case and crank to be parted.
The head, pistons and barrels were taken off to the local engineering firm for inspection and repair. I didn’t take the valves out of the head so I don’t know if there is any problem there. The engineer however commented that ‘something’ had been in contact with the head around the valve buckets and we concluded that this could only be the outer edges of the cam. I need to inspect the cams to see if this is the case – the steel cams would damage the alloy head rather than visa versa but if it is the cams touching then there will be some damage.
The bores look okay, no scoring or lip so fingers crossed that they can honed and a fresh set of rings used. The pistons have some minor scores but look serviceable. Once I know the state of play with the bores I can decide the next steps – obviously a rebore needs new pistons but if there is life in the bores I will compare the cost of a complete piston set against the cost of just rings. The only note of caution from the engineer was that some of the score lines looked to be slightly diagonal which could indicate a slightly bent rod!
My replacement layshaft (I’d forgotten the final drive is off the layshaft not mainshaft) is good to go, I’d forgotten it came complete with gears so it is just a straight replacement.
While the engineer is working away he’s also going to see if he can source replacement car rings for the RGS – much cheaper. Should have his report back by Tuesday and can then get on with sourcing parts and building the motor back up. The busted Atlas may be back within the fortnight so I’m keen to have made progress on the engine before it returns.