pink pantha

mornin i had my crank checked yesterday its 0.030 on no2 lobe scored is it scrap ??? dont want regrind cheers oh and my blocks fractured

scoobysmiff

iTrader: (2)

you can't re-grind these cranks with the certainty of retaining it's integrity. Some say you can but in general as the hardened surface on the crank is so thin, once it's scored it should be considered as scrap or a door stop. If your not sure get a new one, they can be had for around the £350 mark from the likes of API etc

p1mark

Don't fully understand what you are saying?

Do you have a .030mm score on a pin (a lobe is on a cam), or is it out of round by .030mm?

Difficult to say with any certaintity its scrap, it's not good whatever but a 30 micron score in the middle of the pin might be ok if you make sure there are not any high spots. 30 microns out of round, or undersize will certainly not be OK and will lead to a premature failure.

As said, best not re-grind. A new crank is only in the £350 region so not that expensive for what they are really.

pink pantha

thanxs chaps im gettin closed deck block of 96 tommorow but gonna get it checked bare block will it be centre thrust? also cam belt tensioner is diffrent can i use mine or standard 96 one cheers once again

merlin24

iTrader: (1)

Your original block is probablly an early 98 rear thrust block if it has the later tensioner,off set inlet manifold bolt holes.
Closed deck block will be a center thrust block(unless it has been machined to take a rear thrust stroker crank),so make sure your new crank is a center thrust one to suit the CDB.
You can use either tensioner along with the tensioner housing,but personally i prefer the earlier 2 bolt horizontal type of tensioner over the later single bolt type.

Mick

pink pantha

thanks lads picked up block to day.my old block was centre thrust but open deck will my mnifold fit ?also how much 2 re liner block x4 any one cheers again

pink pantha

just spent half hour ringin people about re sleevin my cdb but no one wants to do it any ideas cheers

merlin24

iTrader: (1)

Is it re-linering or just boring to oversize you need - These guy's do quality machining/boring and not a million miles away from you.Chesman Motorsport - Home Page.

Mick

silent running

As Mick says, just get it overbored and fit oversize pistons. YOu can pick up forged 92.5mm pistons cheaply which will only want a 0.5mm overbore.