[TR] TR4 Spin On Oil Filter

[Randall]

> I'm looking for the Fram# or other manufacturer for spin on oil filter for
> TR4.

The list I have is:

A/C Delco PFL400A
Purolator Pure-One PL20195
Mobil 1 M1209,
Motorcraft FL400S,
A.C. Delco PF56
FRAM PH3600
Motorcraft FL400
Purolator L20195
Wix 51516
NAPA 1516
Hastings LF134,135
Amsoil ASF34


> I've read that the spin on filter must be a certain type,
> with an internal relief valve.  

I don't see how that could possibly be a requirement.  The bypass and relief
valves are built into the original filter head, and remain functional with
the spin-on adapter.

It's also worth noting that the pickup point for the pressure gauge is
before the filter, so that if either the relief valve or the bypass valve
opened, it would actually reduce the pressure reading.

Are you sure you didn't read that it should NOT have a bypass valve?

An anti-drainback valve might possibly allow slightly faster oil pressure
buildup at engine startup; but since the filter is angled downward, the
effect will be small (if any).  The original filter setup had no
anti-drainback valve.  And if anything, the anti-drainback would reduce
pressure in the galleries while the engine is running, since it takes some
small pressure to push it open.

Randall