In a message dated 11/14/2008 11:56:27 P.M. Eastern Standard Time,
pdonnel1@san.rr.com writes:
In speaking of oil pressure, all the TR's I've seen tend to have lower oil
pressure as they warm up. Now I understand that heat causes metal surfaces
to expand, and so I can understand some pressure drop. But I've seen a 30-40
lb drop running from cold to hot. Is such a drop indicative of a "worn"
engine? What should be expected? My modern car has an oil pressure gauge,
but it doesn't vary by much. Why do TR's?
What are the ultimate numbers? 80 - 50 is good, 40 - 10 is not. Also
depends somewhat on the oil viscosity you use. The higher second number 10 -
30
vs 20 - 50 is an oil that will respond better to higher temps.
Why do TRs? Because they are TRs. Machining tolerances, vulnerabiliy to
wear, metalurgy, design, etc is better in modern engines than 40 - 50 year old
engines. I have Jeep Cherokee that is at 40 lbs all the time. (except when
it is shut off, of course).
David Lylis
69 TR6 CC26160L
60 TR3A TS74461LO
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