i just got my rebuilt rebuilt back and its got issues . ok i know i dont have any exhaust leaks and accetaline does not rev it up placed anywhere arounrd the intake or exhaust manies.when you first start it up it runs on all 6 clys ,then when the oil pressure builds up it starts to run rough like engine shaking rough.cylinders 2 and 3 have no affect when running and you pull the plug wire off theres no change in the runnng rough. i have 50 pounds oil pressure cold when it gets to bout 40 it starts to run rough. the mechanic says that the clearance is to close and when the oil pressure builds up in the lifter it hits its max and keeps the valve open . now the engine builder sayed he replaced all the valves becaused they were burnt out????.if thats the case was the valve lash or back lash on the lifters set incorectly. any answers on the topic would be appreciated on set up and oil pressures lash or any thing to run smooth thnx for any hlp
Quoted from the OHC forum
If the restrictor tube was replaced, it could still be causing issues if it doesn't seal the adjuster oil gallery properly and allows pressure to leak past and build up in the adjuster oil gallery, holding the valves open.
You can check the oil pressure in the adjuster gallery by removing one of the end plugs and installing a gauge.
