In a message dated 98-05-13 07:30:26 EDT, you write:
> What is the correct way to set up the oil pressure relief valve on the
> housing that the oil filter bolts to.Do you adjust when cold or hot & do
you
> have to fit a test gauge,if so where?.
> <snip>
> Cheers Ashley
> 13-5-98 - Had no luck with any replies so i will post again.
>
Ashley, here is the way to set up a TR4 for proper oil pressure (I THINK the
TR3B is the same):
In the manual - find the diagram of the oil filter assembly. You will see a
pressure relief valve on the side of the top part. It is the screw which you
can see at a 90degree angle from a line which would run down through the
center of the filter element. There is a slotted screw and a locknut which
holds the screw tight. Here is the procedure from the shop manual:
"1. Run the engine until normal operating temperature is obtained.
2. Slowly increase engine speed to approximately 2000 r.p.m. and observe the
oil pressure gauge. Pressure should rise steadily to 75 lb./sq. in. and at
2000 r.p.m. fall to 70 lb./sq. in.
3. If necessary, adjust the relief valve pressure by slackening the locknut.
Then
rotate the set screw (in the center of the locknut) clockwise to increase the
relief valve opening pressure and counter-clockwise to reduce it. When
correct adjustment is obtained, tighten the locknut."
You will have to adjust the screw, then check to see if the pressure is
correctly
falling from 75 to 70 p.s.i. then re-adjust the screw, and check again until
you have the correct reaction. I have done this and it takes time. Be
patient.
The owners manual also says:
"At speeds exceeding 30mph, when the oil is hot, the gauge needle should
register between 65 and 75. A low pressure is normal when idling or running
at a lower speed."
My car runs at 55 psi or above at highway speed after the oil is good and hot.
At idle, say at a traffic light, my pressure is as low as 10 or 15 psi. I
have had no problems.
That should do it. You will need an open end or adjustable wrench for the
locknut and a fairly large screwdriver for the set screw. Let me know how it
works out. The important thing is that at normal operating temperature and
2000rpm the pressure will go to 75psi and then drop to 70psi. Cheers.
Art Kelly '64 TR4 CT33118L (original owner)
VTR TR4 vehicle consultant
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