For a stock (not fresh) engine, that sounds pretty good, actually. The fact
that it bumps 20 psi with oil indicates a little wear on the rings. I'd just
keep driving it.
Unless you're really looking for an excuse to tear into the engine...
Gordon Glasgow
Renton, WA
> -----Original Message-----
> From: owner-datsun-roadsters@Autox.Team.Net
> [mailto:owner-datsun-roadsters@Autox.Team.Net]On Behalf Of Tom PRATHER
> Sent: Tuesday, December 05, 2006 8:31 AM
> To: datsun-roadsters@autox.team.ne roadster list
> Subject: U20 Cylinder pressure?
>
>
> Without privy to u20 specs, does anyone know what cylinder
> cranking psi should be for a healthy engine? I'm getting around
> 160 average and all 4 within 5 to 10 psi of each other. Wet test
> shows a bump up of about 20 psi. Is this a tired engine or just
> normal wear. Trying to decide whether I should hone the bores and
> install new rings. I have no idea of the mileage.
> Thanks,
> Tom
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