[TR] Ideas, anyone?

[Jeff Scarbrough]

Does the TR3B not have an oil pressure relief valve with associated spring?

On Tue, May 12, 2020 at 6:27 PM andrew uprichard <auprichard at uprichard.net>
wrote:

> 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
> ** triumphs at autox.team.net **
>
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