Fresh 351w build, GT40P heads, Crane cam, Scorpion roller rockers. Has about 10k miles on it, including two trips across country. The last 2 weeks or so I have had a valve ticking. Both #5 rockers are not getting a lot of oil. The front one is getting next to none, and the second one back is getting just a drip. All the others are flowing good amounts of oil. I can not get the rockers to zero lash. I have swapped positions of rockers and push rods to eliminate the problem. Still present. Push rods are spinning and seem to be nice and straight. Intake is coming off in a few minutes to take a look at the lifters. Any suggestions?

 

Im thinking my push rods are too short.

 

Can't get to zero lash? You mean the lifters aren't preloading when the rockers are torqued?

 

Just on the front rocker on number 5. If i start and run the motor with the valve cover off and push down on the rocker the noise gets much louder. All the others are quiet and pumping oil. The front one isn't pumping up all the way, nor is it pumping oil out of the rocker. Im thinking that the internals of the lifters are gummed up and causing problems. Moving the push rods and rockers does not change move the problem. This engine has about 10k miles on it, with 4 oil changes so it should be nice and clean inside.

 

could be an oil pressure or volume problem, Not sure how the oil flows through the block but I'd guess #5 lifters are the last ones to get oil. Possible front cam bearing going out? If you're pulling the intake I'd swap lifters (temporarily) and crank the engine over and watch the oil flow.

 

Lost an oil galley plug. The one behind the distributor drive gear. Replace it,and it popper out again when i was re-priming the oil pump. Going to get a 1/4 npt pipe thread and re thread that hole tomorrow morning. Costing me a fortune in gaskets.

 

To much beer. Behind the dizzy is threaded all ready. New plug is in. Problem solved hopefully.