Cracked Cam Lobe!

[mikekean]

Took my head apart today to look for what i thought to be a failed tappet. But look what i found..

Pretty sure this is the cause of the tap i was receiving, the tap was coming from in the same are i located the tap down to use a mechnics stephascope. Anybody hear of this happening on an F4R before?

Also is the dephaser pulley ment to have an front to back play in it?

 

[geesus69]

i'm pretty sure this has heppened before and has been posted on the forum

EDIT: and hey presto

http://www.cliosport.net/forum/showthread.php?t=454097&highlight=camshaft+lobe

 

[sideways danny]

jesus!! Billet cams all the way

 

[Fred@BTM]

good effort!

 

[sideways danny]

silly press together cams. someone should tell renault it's not lego

 

[mikekean]

Yeah i was pretty shocked to say the least.

Would love billet cams but because its a cup racer you cannot remap the ecu, and i cant afford cams, remap, and a new ecu right now. So standard renault cam it will have to be.

Any idea if this would be causing the tapping noise i have been receiving or could that be another problem?

 

[sideways danny]

cat 420s are "standard" billet cams. Basically intended for motorsport use when you have to have standard, they're just the best you can have within tollerence

 

[mikekean]

cat 420s are "standard" billet cams. Basically intended for motorsport use when you have to have standard, they're just the best you can have within tollerence

Yeah cheers i thought about 420's, but been as in the future im going to upgrade for higher lift items im going to buy a standard renault cam and put the money i would of spent on 420's towards the higher lift cams.