It's easy to check if the piston is moving. Just pull out the spark plug and
put a long-bladed screwdriver in the hole. Then turn the engine over on the
starter (unplug the wire to the points so it doesn't accidentally start!)
and see if the screwdriver moves.
Gordon
> -----Original Message-----
> From: owner-datsun-roadsters@autox.team.net
> [mailto:owner-datsun-roadsters@autox.team.net]On Behalf Of Mr. McDougall
> Sent: Sunday, August 14, 2005 10:15 AM
> To: datsun roadsterlist
> Subject: What causes zero compression?
>
>
> ok, yes I have bad news for me but I would like to
> understand just how bad, maybe?
> my number 1 cyl is just not generating any
> compression, yet when I blow into the hole with the
> compression hose , it resists completle, I also cant
> seem to suck any air through the hose. I have checked
> and even compared the valve clearances and I can see
> the valve stems moving up and down when I crank it
> over. The only thing I can think of is that the
> piston isn't moving (yikes)? Anything else?
> Mick
> PS I know I am a pain, but I would like to join the
> running roadster club someday.
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