Hitchcocks Forum

I got called in to look at an Inter today that the owner was refitting the heads that were removed a couple of weeks ago to fit new rings. Problem was when he tightened the heads down the rockers were holding 3 of the valves open. With the adjusters backed out the locknuts were holding the valves open. I checked everything that I could but was unable to see what has caused this. I fitted the heads to this motor probably 12 months ago and had no problem. Anybody have any thoughts?

Valve seat recession? The Cross rings are in place? REgards, Mark

I know nothing about inters but just a thought are the pushrods of different lengths, inlet & exhaust? Are the rods properly seated on the followers?
Just my 2 cents

Bryan might have a point, though the pushrods are all the same length they have different ends. Are they the right way round? Shallow cup to the rocker l think. REgards, Mark

All new valves about 5000ks back, everything looks to be in perfect condition, pushrods right way around, this thing was together and running fine but a bit smokey, new rings fitted and then this rocker problem surfaced. I ended up putting the locknuts on the top of the rockers and it is fine, up and running and no problems so far. Has me buggered

has it been fitted with valve caps?

No Vince, first thing I looked for, but it is running fine with the nuts fitted on top, see how it goes