03-08-2018, 09:43 AM
Good timing for what have been looking at for the installation of my new block (when I get it finished).
I have been reading up on old instructions on Cornwall site etc which appear to suggest that the block can be removed with engine in situ (presumably basically easily, undo nuts and heave). The replacement process receives scant instruction other than to refit/replace.
The thought of being able to renew the top end without taking the engine out has many attractions. However, I am conscious of the likely problems with sliding the block over pistons/rings 2 at a time (presumably using 2 ring compressors, sliding the block down and then moving the 2 compressors over to the other 2 lower pistons and pushing it down.
I can see other difficulties, eg replacing pistons with the rods in situ and avoiding bending them.
The alternative of removing the engine, removing rods/old pistons from below, attaching new pistons in a vice with suitable gudgeon pin clamp, then lowering 1 by 1 into the block and then lowering block assembly onto crank case to reattach rods to crank has obvious advantages in the engine reassembly stage, but adds in the complications of removal/insertion of engine when I don't have an engine hoist.
Do the problems of doing it in situ outweigh the time and effort of pulling the engine (plus geabox?) out?
Andy
I have been reading up on old instructions on Cornwall site etc which appear to suggest that the block can be removed with engine in situ (presumably basically easily, undo nuts and heave). The replacement process receives scant instruction other than to refit/replace.
The thought of being able to renew the top end without taking the engine out has many attractions. However, I am conscious of the likely problems with sliding the block over pistons/rings 2 at a time (presumably using 2 ring compressors, sliding the block down and then moving the 2 compressors over to the other 2 lower pistons and pushing it down.
I can see other difficulties, eg replacing pistons with the rods in situ and avoiding bending them.
The alternative of removing the engine, removing rods/old pistons from below, attaching new pistons in a vice with suitable gudgeon pin clamp, then lowering 1 by 1 into the block and then lowering block assembly onto crank case to reattach rods to crank has obvious advantages in the engine reassembly stage, but adds in the complications of removal/insertion of engine when I don't have an engine hoist.
Do the problems of doing it in situ outweigh the time and effort of pulling the engine (plus geabox?) out?
Andy
Enjoy yourself, it's later than you think!