Alfa spider 1750 valve shims (help)
Built my alfa 1750 series 2 motor (1971), I had some issues with what I'd done namely it ran poorly.
I decided to take the engine to a reputably rebuild shop near me and as I'm a fortune into this car which besides the engine is as new I decided to have a full build and race balance.
I bought all the parts from Classic alfa, new crank shells, new pistons and liners, new oil pump, new water pump etc, everything was given to the builder including gasket sets etc.
The head had already been rebuilt by another local specialist and was supurb, I told the latest builder this and left them to it.
I fitted the rebuilt engine and it ran terrible, I put it down tocarb settings etc and tried to get the setup better, but i then noticed a lot of oil on the floor beneath the car, I mean a lot, I ran it again to see where it was coming from and honestly looked like it was being squirted out of an oil can.
I stripped the head off and changed the head gasket, the builder had missed the o-ring out of the build, bit annoying and I told them so and carried on.
Engine now oil and water tight and it ran better, not perfect though, bogged down when setting off and a bit lumpy, a mate suggested doing a compression test which I did, no1 @ 175 psi, no2 @ 175 psi, no3 @ 175 psi and no4 @ 90 psi.
My mate did a leak down test but while working on this we noticed that the inlet valve had no gap and was always open, all the other inlets and exhaust valves have perfect gaps so its puzzling.
I have stripped the inlet cam out today and I need a shim cap of .050" or less and after looking at classic alfa I note that the smallest shim they offer are .059", I also have a spare head (for parts) and the caps in that are almost all the same and about .020" bigger than what I need.
Now then, I could easily grind one but I don't understand the issue I have, I'm tempted to pull the head again just as a precation that the head is not getting pulled off the valve.
Can anyone offer advice or guidance, I don't mind dealing with issues but I now need to move on from working on this project, its been never ending problems.