Hello all;
I'm new to the list, so I'll introduce myself. I'm John Di Fede,
working at Consumers Reports (the car test people) in Yonkers NY (just
north of NYC). I sharpened my teeth on a 1970 Spit while in college,
but sold it because parts were too expensive (cut into my beer money).
Currently own : 1975 TR-6 70k miles good condition
1973 MGB Total restoration by me
1980 MGB I'm getting around to it
My most recent purchase is the TR-6. I've changed the U-joints,
springs, shocks, rebuilt carbs, rebuilt brakes, tune, etc.
This car runs liks a shaved ape! The motor pulls well (less shifting
then the MG) and just hums along. The sound out of the stock exhaust
is sweet.
Ok. My point. At start up with 20-50 oil the pressure is at 90lbs.
After 50 miles, at idle the pressure is maybe 15lbs acording to the
dash gauge. Idiot light never comes on. The engine shows no sign of
excess wear no unusual sounds, and the sparkplugs are clean.
The only thing I hear is a faint sound (rumble?) of moving parts sort
of like an old water pump might make.
Anybody out there ever experience this? Would rocker arm wear cause
this?
Would changing the connecting rod bearings improve this condition?
Somewhere I read where Bentley recommends changing them at 50k miles.
I checked the oil presure relief spring length and added a small
washer to bring the free spring length bask to spec. This seemed to
help. Also the oil gauge always reads steady. The needle dosen't
bounce.
I really can't believe a full rebuild is necessary at this point.
Any help would be greatly appreciated!
PS. Thanks to all for oil cooler mounting advice.
"AN ACCOUNTANT WITH DIRTY FINGERS"
"MY VEHICLES ARE NOT NECESSARILY THE VEHICLES OF MY EMPLOYER"
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