Quote:
Originally Posted by Jim Brierley
Copper lines: Copper will work harden IF it is allowed to flex or vibrate. In the 50's, etc., most production cars had a small copper line from the engine to the oil pressure gauge, I was a truck mechanic from 1956 to 1976 and never saw one crack or break. Trucks used copper air-brake lines, etc. etc. Copper has gotten a bad reputation, undeservedly! The bad reputation has been passed on by those that have never been associated with it.
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I agree with Jim !!! The only line - tubing that I've had to crack was a steel gas line on my roadster . We always put a loop in the copper gas line and that seemed to prevent cracking of the copper line .