xe esp

i have a 351 cleavand. just bought the car and it keeps snapping cam lobes with in 10 minutes of running after instalation. any idears on what it could be???

Mental

It could be many many things.

Your better off telling us how are you running it in first, also, what type of valve train gear are you using - Solid/hydraulic lifters, standard/roller rockers?

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Any problem is best aproached sideways ... with a crowbar
-Mental

geos sho

exactly mental, what brand cam? what is open spring pressure, I have had and heard of crane doing this, is it splitting the lobe or shearing in the middle. side ways? more info please. GEo

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my need is speed

xe esp

i dont know a great deal about the engine. its running a comp cam hydraulic lifters with standard rockers. i am a diesel mec apprentice so yeah i am very new to petrol. I am in the process of changing the valve springs messuring the lift and piston to valve clearance. i did notice that there is a 90 tho shim under only one of the valve springs and i have a feeling that the vavle springs are not suited to the engine. Is it true that if there is a problem with the valve spring tentions and if it may be bottoming out it would destroy a rocker before the cam lobe?? and is it true that 240 to 280 is the correct vavle spring pressure for a clevo???

thanks

xe esp

dont know a great deal about the engine. its running a comp cam hydraulic lifters with standard rockers. i am a diesel mec apprentice so yeah i am very new to petrol. I am in the process of changing the valve springs messuring the lift and piston to valve clearance. i did notice that there is a 90 tho shim under only one of the valve springs and i have a feeling that the vavle springs are not suited to the engine. Is it true that if there is a problem with the valve spring tentions and if it may be bottoming out it would destroy a rocker before the cam lobe?? and is it true that 240 to 280 is the correct vavle spring pressure for a clevo???

thanks