[T3] 73 T-3 oil temp?

[William Jahn]

There is a variation in the relief spring compressed length. 1 3/4" 12.3-16
lb. I read that some use a scale and a drill press to compress the spring
to 1 3/4" and the scale reads the lb . I have a scale and drill press.

On Fri, Sep 10, 2021 at 11:56 AM William Jahn <willjahn975 at gmail.com> wrote:

> I know of Farm and Fleet, they are only in the midwest , I went there when
> I lived in IL.  It was at least an hour's drive one way. Mainly got
> batteries for my car there.
>
>  As far as oil , all I have in hand is Valvoline SAE 40 , it's not the
> racing oil , it does have 760 ppm zinc , a bit more than half the amount
> the VR1 has. I've already used a quart to add to the VR1 because it leaks.
>
>  I tried to test the VDO oil temp sensor at 212 F yet the readings were
> all over the map so that test doesn't help. The only other thing I'd like
> to do is just check the cooler bypass relief valve. I read quite a bit on
> it and since the spring it has to be 40 years old because I used the one
> out of the stock engine. From what I read, if the spring is weak or the
> valve sticks oil could bypass the cooler . The piston has to be at the top
> to block the bypass port . I do have 2 NOS springs and one new piston. All
> I did was use a new piston and the old spring. I don't have any way to
> check the old spring yet I can compare the uncompressed length with the new
> one and see how they compare when I compress them by feel. Also fit the new
> temp sensor that fits the relief valve just to see how it reads and reacts
> compared to the one I have in the sump
>
> On Thu, Sep 9, 2021 at 3:01 PM Jim Adney <jadney at vwtype3.org> wrote:
>
>> On 9 Sep 2021 at 11:03, William Jahn wrote:
>>
>> > Here where I live there exist only 2 auto parts stores AutoZone and
>> > O'Reilly . AZ mainly carries synthetic oil and as for or any with zinc
>> > Valvoline 20/50 is it and they have no zinc additives, very little
>> > conventional oil other than STP in SAE 30 and 40 . O'Reilly has better
>> > selection trouble is it's in a very bad area.
>>
>> I think SAE 30 or 40 are probably both fine for you, but 50 is going
>> overboard. Straight weight oils are hard to find these days, and you
>> probably
>> don't need multiweight living where you do. Here in Wisconsin I can get
>> stuck if I have SAE 40 and the temp suddenly drops to zero. BTDT, don't
>> want to do it again. OTOH, my Type 3s seldom see those temps any more.
>>
>> There are often better shopping options than auto parts stores. I buy
>> store
>> brand Diesel 15W-40 at a local place called Farm & Fleet. Comes in 2.5
>> gallon jugs for about $22. There's a chain called Tractor Supply which
>> you
>> might find closer. Look for places that sell to truckers. I can find the
>> Lucas
>> ZDDP additive at my FLAPS.
>>
>> --
>> *******************************
>> Jim Adney, jadney at vwtype3.org
>> Madison, Wisconsin, USA
>> *******************************
>>
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