pushrod hole?

i have a jp1 block and a set of aj fuel heads , every thing fits up good except for the exhaust pushrod holes in the block dont line up properly with the ones in the head and the pushrods bind . i can feel its not right when i try and set the valve lash , it slightly flexes the pushrod till it lines up in the cup........intake ones are good . looks like i will have to machine the block to match them up..........heads should be interchangeable left to right.............any body else been through this.

 

goin through this right now, just on the intake pushrod holes......... gotta have them machined also........ brad heads, KB block. pretty standard, you'd think everything would be fine...... im used to this kinda mess though. nothing on my motor just bolts up. everything needs a little tweaking.

 

Dave if you use the manton New Berry push rod it should clear..Dave
www.myspace.com/daveloweswr

 

a friend was having the similar problems with the pushrods binding up on a combo like that they ended up raising the rocker stands up a hundred thousands and it fixed there problem

 

hi Jim, how did they raise them up?..Thanks Dave

 

sounds like its not that uncommon , any idea why these holes would not line up ......seems to be mostly exhaust , should i just remove enough to get it to work freely from the spot where it contacts or put the head ina mill and make the hole bigger ?

 

they machined a a peice of alum put it under the rocker stand then torked them back down

 

when I had the problem it was with a std deck std cam motor and I called BAE and they told me they all will have this problem and to watch if you clearance the head because you will loose the push rod liner..Dave
www.myspace.com/daveloweswr

 

dave......the bronze pushrod liners or tubes.. how thick are they ?did you just cut them with a burr and clean them with a sanding roll

 

VERY THIN............Dave..I can mic one if you want

 

i rang ajpe this morning.. them tubes are only .015 thick and thay said most likley wrong stands "purple" or the valves are cut too deep and upseting the geometry.......any idea on what the differant color stands mean.

 

mine are gold i have no prob

 

gold here also..Dave

 

ok......progress report!!!!!!! i put a .120 taller crane lifter in and then cut a old pushrod down and made a checker so i could shorten it and the problem has gone .......only checked one tonite , i will go through all the others and double check but i think thats what will fix it.......