My 477 Build thread

[CptCaveman]

Hi folks, just creating a single thread for my build questions, to keep the other threads noise free.

I am having difficulting getting the new cylinder barrel to seat properly. It seems stuck with 5mm left to go. It seems to be held up in the middle somewhere. I wondering if it's because the new cylinder barrel doesn't have this curved cut out as the original (pictured below). My barrel was machined fully straight without this cutout?

 

[sam2019]

I wondering if it's because the new cylinder barrel doesn't have this curved cut out

nope, none of our liners, not the Hima ones and not the j-engine ones have this cut out.
can you measure the total length of both for comparison?
It is hard to imagine that this is an issue as we use the same liner since ages, but then again I am not present when the work is done and there is always the possibility of someone getting creative without informing me.
I will inquire with the workshop.

 

[CptCaveman]

I think it's the dowels, one of them in particular is a tight fit into the new head

 

[Dool]

The cut away is ( although it looks for crank clearance) to allow the piston pin to be assembled with the piston assy into the cylinder ie pin is less that half way in so you van drip the whole piston and barrel assy onto the con rod.
I always cut away a small half moon slightly bigger than the pin circumference so it is a one man job.