knocking noise in motor "intermitent"

i've just put in a new 454 (rebuilt) in my boat. it came out of a nova. i changed the came to a 112 lobe center and put it in the boat. it ran great. then started to sputter. i pulled the intake to find a bent a rod. before that though the lifter fell off of te #4 Cylinder (intake lifter fell off). i put it back on. then the motor began to knock. so i changed the pushrods to 7/16 w/ bigger guideplates. i started the motor and the knocking noise was still there. though it would come and go? i don't know what would cause this.

further more i've got water coming into the motor. so i pulled off the head to inspect. sure enough everything is fine. could the water be coming from the hose i hooked up to the intake manifold? creating too much pressure and sneaking into the valley?

PLEASE HELP I'M READY TO FILE AN INSURANCE CLAIM AFTER I SINK THE F*^KING THING.

i've just put in a new 454 (rebuilt) in my boat. it came out of a nova. i changed the came to a 112 lobe center and put it in the boat. it ran great. then started to sputter. i pulled the intake to find a bent a rod. before that though the lifter fell off of te #4 Cylinder (intake lifter fell off). i put it back on. then the motor began to knock. so i changed the pushrods to 7/16 w/ bigger guideplates. i started the motor and the knocking noise was still there. though it would come and go? i don't know what would cause this.

further more i've got water coming into the motor. so i pulled off the head to inspect. sure enough everything is fine. could the water be coming from the hose i hooked up to the intake manifold? creating too much pressure and sneaking into the valley?

PLEASE HELP I'M READY TO FILE AN INSURANCE CLAIM AFTER I SINK THE F*^KING THING.

Did you rebuild the motor or did it come from a rebuild factory? Was the block magnafluxed and pressure tested before the rebuild. If I was a betting person I'd be pulling the motor and looking for where the water was coming from. If it is from a cracked block, I'd take it back to wherever you got it from. Pull the pan and look for bearing damage.

...Ron

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