Reworking the 273 Adjustable Rockers

yellow rose said
You are not getting what I am saying.

You can modify and drill all you want. To get the oil correctly on the pushrod and ball, the oil hole in the rocker arm MUST line up with the oil hole in the shaft. It IS that simple. I have never seen an original 273 rocker shaft. I have only had DC or MP ones, and at one time I had some Isky shafts. Not one of them had the oil holes in the correct location.

Again, the ONLY way to get the correct oiling to the pushrod cup/rocker ball, the oil feed hole in the shaft MUST line up with the oil feed hole in the rocker.

This means that whoever is assembling the engine must, MUST mock the head up and physically LOOK to VERIFY the holes are lined up. This is with the rockers on the shaft, the valves in place at the correct installed height, and the adjuster removed and look at it. If you can't see the oil hole in the shaft you need to figure out why.

In my opinion, you can't build a performance engine with out checking this. I know there are thousands and thousands of cars out there with rocker systems that have not been corrected. But eventually, luck runs out..

OK I took pictures about 10 of them. Then went to upload them an got nothing but error messages. I will try again later for the pics.

However the holes on my shafts lined up with the holes on the pushrod side of the 4 that I checked using unmodified rockers. They are stock 273 rocker arms and shafts.

Now I said the holes lineup. When the pushrods are in place an the engine is turning over the hole is never uncovered. The hole in the shaft is straight below the hole in the rocker at zero valve lift and even farther away at max lift.

These rockers were used on the D Dart with a 273 using a .500 lift cam from the factory. I'm using them on a .462/473 lift "stock" cam in a 360.

Glad you got my interest up on this because the guy that assembled my motor put the shafts in upside down. The grove was on top and the other holes were on the valve side. Now I'm going to remove the intake to see if he put the valley baffle hold down straps on correctly.