Let's have a look inside the B235R

Slow and steady progress as I get chance. Looking pretty good in there, other than the chain guide..

I think I'm going to push out the budget and get the Wossner's in, now I'm at this point. Just need to have the bores measured so I know what to order.

A Saab master tech who has built a few engines (very knowledgeable guy) told me...

"The wossners are set for a 90mm bore but really need to be 1.25 thou bigger for correct clearance so if they are a bit worn its ok. Just have them professionally honed to size".

I know next to nothing about this stuff (other than it's important!) so hoping the machine shop near me is all over it.

The same guy said I would probably be ok @ 90mm, I was thinking 90.5 but if I can avoid over-boring that'd probably be good ($). I need to get a quote regardless, in case this machining knocks my budget out. This sort of work isn't that cheap over here.

FWIW, the deck is marked "A" for each piston, which seems to be the "we got this one right!" bore from factory 😂

Timing and balance chains, showing the smashed up chain guide:

Carbon build up on piston crowns (also evident on the exhaust side valves)

Clutch disc, which will be replaced