Please help. 1.6L 8V valve problem???

[DieselDog]

Hey fellas.

I just rebuilt this engine and I had the head remand.

I put a preformance cam in aswell. When you turn the engine over by hand. I noticed this when I was timing it.

Just has the rocker goes over the cam lobe the valve pops shut. its not a smooth movement. Does this for most of the valves.. So I Started it up and it runs valves dont hit the pistons or anything. But the valves suddenly closing make it sound horrible.

Any ideas? maybe I timed it wrong but I dont think so. Im a mechanic by day.

My guess is the valve springs arnt strong enough for the cam shafts profile?

Please help Im moving in a few days and need this sucker fixed.

[jtgh]

who mad cam.
some do good
others make junk.

8 valve lash setting

see how bad my new page is.

[DieselDog]

yeah im yankin out and putting the stocker in for now. Im not impressed with it at all. I tested all my springs and I know there good for a stock cam. I think the lift is just way to high and the duration is to short so it drops off the lobe to fast.

[jtgh]

you sound spot on.

cheers.

[aquanaut20]

Springs to short to maintain contact pressure with high lift lobe.

Ran that problem when I raced Volvo. Tricky calculations.

[DieselDog]

The actual problem was the nipple off the camshaft for the cam gear broke off. I drilled it out and put a new one. Good as new. The noise was from the cam slapping around as the rockers pushed it around after the top of the lobe