Tappet guide

[fastharry]

Can anyone tell me why there is a tread on the 2 outer tappet guide blocks?

[trevinoz]

I use the thread to pull the guides from the case.
I guess that is the reason they are there.

[RichardL]

What engine is that. Should I guess long stroke?

Richard L.

[Greybeard]

I didn't recognise it and not wanting to look a prat I've been waiting for someone else to ask!

[fastharry]

Its a basket case A7 from 1948 im trying to put together for a friend. But i cannot find much info on this engine,

[trevinoz]

This is the long stroke section,fellows.

[RichardL]

This is the long stroke section,fellows.

That fact is.visible in the mobile version,.but very subtle. You have to.look for it, which I obviously didn't. Thanks.

[vinver]

Puller threads to remove guide block.  The center double guide block is clamped between the cases but the outer ones are pressed in place. Unlike the A10- based engine , the early long strokes have separate guide blocks .