Need some help Plz

Paul_sterling wrote:tits the same size externally
Paul

heheheheheheheee

Ye i got all of the bits with it,
The big end shells are definatly tired but i have found new ones on ebay along with a wide range of other parts.
I cant see any frost damage on it but i may come across some when i start to clean it up, but hoping not.

Any frost damage on these engines is usually on the cylinder behind the valve push rods.

Bill.

billypurves wrote:Any frost damage on these engines is usually on the cylinder behind the valve push rods.

Bill.

Bill,

do you ever get frost damage on the opposite side of the Head, i.e. the side wit hthe water outlets on?

i only ask because mine has grinder marks on that side, the 6 has been ground off, making me think someone has been there doing stuff they shouldnt have been doing.


anyways.

Kevin,

not had much experience with problems in the bearings area myself (bill may be able to confirm or deny this) but i seem to recall that you cannot grind the crank undersize on a cs, something to do with 'stepped surfaces', so check thoroughly that the crank surfaces have no signs of 'picking up' and if they are okay, you may get away with polishing them and fitting new bearings.

cheers.

Paul

I did see an engine with damage to the opposite side I am sure it was in SE magazine,not usual though or at least I have not seen it before. If the damage is only cracks they can be repaired easily, what I have done in the passed is "Veed" them out with a thin cutting disc in the grinder and filled it with epoxy..JB Weld or similiar.

You are also correct about the crank due to stepped surfaces.

If it is light scoring on the crank a polish out and correctly fitted new bearings for rally purposes or light use should be OK.

Great engines and easy to work on with plenty of room around them. Things can be a bit heavy though ie Electric flywheels and the cylinder, can make me grunt anyway but I am an old geezer compared to you young bucks.

When rebuilding them I find it easier to fit the piston in the cylinder then fit the cylinder to the crancase and then fit bigend to crankpin,saves trying to squeeze rings into cylinder and holding the weight of the cylinder too. Works for me.