[TR] Oil Pressure 102

[DLylis at aol.com]

In a message dated 11/14/2008 11:56:27 P.M. Eastern Standard Time,  
pdonnel1 at 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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