So its been while since my last update... Basically I got the bottom end mostly built up, was having a tidy up and had a small accident, I dropped the short motor, breaking the corner off the block and bending the crank!
So I stripped the ,luckily, undamaged pistons and rods out and had to find another block and crank and have it machined and re check all the clearances.......
I then came to the next problem, early cranks have two flats that drive the oil pump like this.
Later ones have six flats like this,
The later pump bodies don't have the crank sensor bracket that I need, luckily the pump rotors are interchangeable, however somebody at GM decided to change the oil seal diameter to a different, dumb, size so the pump body was dropped off for machining to take the later seal.
I then built up the bottom end and fitted back in the car before I could damage it.
Then lapped all the valve seats and built the head up with new springs, seats and retainers
and dropped that back on the block
Because the head and block have been skimmed I checked all the valve timing (forgot to take a photo with the dial gauges on) found the exhaust to be spot on but the inlet cam was advanced 4(cam) degrees so I redrilled the gear ten teeth plus 4 degrees retarded, pictured here before I timed everything up
All back together, doesn't look any different to before.
We've been out for a session to bed everything in, no fluid leaks so should be able to start winding the boost up at the weekend
