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RE: [oletrucks] Oil Pressure Reading Problem

To: Michael E. Mendonša <mm@service-quality.com>,
Subject: RE: [oletrucks] Oil Pressure Reading Problem
From: "Hanlon, Bill (ISS Houston)" <bill.hanlon@hp.com>
Date: Mon, 4 Oct 2004 10:23:35 -0500
Air in the line will cause delayed action by the gauge.  The small size of the 
line to the gauge restricts flow of oil used to compress the air in the line.  
Assuming the gauge is working correctly it will eventually read the proper 
value.  The bad news is that it would also go down slowly, not warning you of a 
low pressure situation immediately.  

If the line is full of oil instead of air the gauge will react very quickly to 
pressure changes (air compresses, oil doesn't).  

Try "bleeding" the line by starting the engine, loosening the tubing connection 
at the back of the gauge, waiting for oil to flow out of the connection and 
then tightening the connection.  

If the gauge still reads zero it is defective (assuming the engine actually has 
proper oil pressure).  Remember that early Chevy 6 cylinder engines do not have 
near the oil pressure (especially at idle) that modern engines have.  

oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959

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