[TR] Ideas, anyone?

[andrew uprichard]

Having (I think) sorted out the problem with the TR4, I took a
recently-finished TR3B out for its second inaugural drive.

 

The first inaugural drive went pretty well, but once the engine temp came
up, the oil pressure fell like a stone - and here we are talking around
40psi at 3000rpm and almost nothing at (what was hot) idle. Adjusting the
pressure with the screw on the oil filter head did nothing.

 

I checked everything over, even pulled the oil pan and checked all the
bearings (one main and 4 rods) - all perfect.  I really didn't find
anything, and the specs on the oil pump looked good, but I ordered a new
pump as well as a new spring for the Purolator oil filter head (the valve
itself is no longer obtainable).

 

So today when I first took it out, the pressure was almost too high - around
90 at 3000 rpm.  But as soon as the engine warmed up, it again dropped to
scary levels. No leaks, no oil in water or vice versa.

 

I am running out of ideas here.  Could it be a bad oil filter head?
Anything else?

 

Andrew Uprichard

Jackson, Michigan

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