[Roadsters] Compression test re: engine health

[Gary and Cindy Ault]

Ritch,

Send the carbs to Z-Therapy. Worth every penny.  Then assess whether you 
have other problems.

145 psi isn't great, but compression values depend so much on the gauge and 
other factors that I would hesitate to approve or condem any engine on the 
basis of compression readings alone.  Did you have the clutch in and the 
accelerator pedal to the floor when you cranked the motor?  Uniformity of 
readings is more important than most other parameters, especially when you 
say the car is not burning oil.

Others on the list may have more expert opinions.

Gary Ault

----- Original Message ----- 
From: "Ritchie Labate" <rlabate at sbcglobal.net>
To: "Datsun Roadster blog" <datsun-roadsters at autox.team.net>
Sent: Saturday, April 05, 2008 10:38 PM
Subject: [Roadsters] Compression test re: engine health


> Being a new Roadster owner ('68 2000), I'd like to assess the general 
> health condition of the engine. I've rebuilt the distributor, replaced the 
> plugs, coil (MSD), and wires (MSD). I checked the compression today and 
> each cylinder registered 145 psi after 5 cranks. Is this acceptable? What 
> would a leak-down test determine compared to todays test? How do I perform 
> such a test? The car doesn't burn any oil but occasionally blows some 
> smoke (running very rich, need to replace carbs). What is the tell-tale 
> diagnostic that would reveal serious engine concerns/rebuild?
>
>  Thanks!!
>
>  Ritch
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