[TR] Ideas, anyone?

[Don Hiscock]

In general, yes the TR3B has the same pressure relief as any TR3A.



On Tuesday, May 12, 2020, Jeff Scarbrough <fishplate at gmail.com> wrote:

> 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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>
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