can anyone help.i bought bd10 camshafts for my sierra 2wd cossie and can not get the timming to line up.if the block is on top dead centre the cams are out by just over one tooth on each cam what do u think

 

have you put them in the right way round?

 

I hope you have aligned it with the tooth and not the notch?

 

you have to manually holt the camshafts on TDC as they want to naturally rock over either a tooth forward or bckwards...

 

yes it is timed up properly. when the crank is on the notch and try to time up the cams they come round so far and then the valves seem to hit the top of the pistons. someone told me that if the head has been skimed to mutch this could b the problem. could this be possible

 

also wild cams like those will need pockets machining into teh pistons to allow the valves to be open for longer.

 

NOT needed when using bd10's m8

 

what are you calling the notch? the groove ??? if so then that's the problem as you use the lug nearset the groove to time up on the yb's engine

 

like this...

 

yes that is the notch i use to time it up.

 

as said before i would double check you have the exhaust and inlet cams in the right way around