So I'm doing the last bits of my 277 rebuild, specifically fitting the Pamco unit and wanted to 'walk it through' a couple of turns to make sure that all was well. During the build I had set the cam with the left side at TDC and sure enough on the walk through, all looked fine on that side - inlet valve opening as piston descends, closes before the compression stroke, both as per original (checked with a degree wheel).
Here's the weirdness: on the right side, TDC seems to be 277 degrees (all good) but the valve action seems all wrong. Inlet valve opens with the corresponding piston around BDC and stays open as that piston rises on its 'compression' stroke. As it reaches TDC (with me inching the crank round with a wrench) it 'jumps' past TDC on its own. Consequently while ther is goos compression on the left side, there is not on the right.
It's doing my head in and I am beginning to wonder if I put the cam in the wrong way round (is that possible?) or even if the cam was not rephased correctly??
Anyone out there make head or tail of this??
Here's the weirdness: on the right side, TDC seems to be 277 degrees (all good) but the valve action seems all wrong. Inlet valve opens with the corresponding piston around BDC and stays open as that piston rises on its 'compression' stroke. As it reaches TDC (with me inching the crank round with a wrench) it 'jumps' past TDC on its own. Consequently while ther is goos compression on the left side, there is not on the right.
It's doing my head in and I am beginning to wonder if I put the cam in the wrong way round (is that possible?) or even if the cam was not rephased correctly??
Anyone out there make head or tail of this??