I just installed a rebuilt cylinder head on a 93 4x4 22RE. This is an EFI engine. This is what I've done: The cam sprocket is pointed at 12:00. The crankshaft sprocket is pointed at 6:00. The rotor is pointed at the No. 1 plug. The crankshaft pulley is pointed at 0 degrees. No. 1 and 4 pistons are at the top of their travel. I assume this to be TDC for No. 1 cylinder.

My problem is that the No. 1 exhaust valve is tight against the rocker even with the adjuster removed. No matter where I put the cam lobe the rocker stays tight. Have I missed something somewhere? Someone suggested the timing was out 180 degrees butI don't see how. Is it possible that the valve is stuck on this "new" head? Help!

>>>*Well, assuming by the sprockets pointed at 12 & 6 you mean the actual timing marks, that should be correct.

There should be lash at this point, if touching the rocker arm then the only thing I can think of is that valve is way off on installed height.

The spec for the valve spring is 1.594" stock, we use 1.600" to 1.610" for our springs. This is hard to measure when on the engine, but we sometimes use a thin piece of wire, touch alongside the spring against the pad and then mark it at the underside of the retainer. Then we pull it out and measure, a bit crude but it works.

Off the top of my head that would need to be about .2" of an inch or a bit more to do what you describe.

Sounds more likely that somehow the cam is out of time or the builder simply installed the wrong valve?. Possible, I saw a head come in about a year ago with the intake valve on the exhaust seat and vice-versa...really!...*And delivered to the customer that way....But that I would think you would notice, in fact....I would think ANYBODY would notice......*EB