> Since the oil flows through the cooler before being supplied to
> the engine ... what do you think will happen when you plug'
> those holes ?
>
> Randall
Not quite Randall, the TR6 spin-on adaptors are not made like that (but they
should be).
Mocal / Aeroquip produces the two spin-on adaptors for the TR6 from the same
casting, the two versions being the one that has no provisions for an oil
cooler and the other that does. The castings are exactly the same, with the
difference being that Mocal merely machines through two already cast in
bores to form the oil cooler takeoff and return. They then tap the bores to
allow for them to either be plugged (as supplied when you get the adaptor)
or for the oil cooler hose end fittings to be screwed in-place.
When you plug the cooler outlet and inlet bores, you force the adaptor back
to performing as it does when the cast bores are left unfinished.
The engine gets oil regardless of these two bores being plugged, because the
opening to the filter and the return to the backside of the adaptor (return
to the block) are still there and never at any point get blocked when setup
for use with an oil cooler (or no oil cooler).
It is not an ideal design when running an oil cooler because what happens is
that not all of the oil is circulated through the oil cooler, BUT all of the
oil is filtered!!! However, because the oil filter housing should be seeing
the highest oil pressures in the engine, quite a bit of the oil is
circulated through the cooler anyway - how much 30 / 40 / 50%? No idea.
Adding the cooler still adds some function and it increases the capacity of
your lubrication system, which usually results in lower oil temps anyway.
The short of it is, for what most people use the spin-on oil cooler adaptor
for, it works fine. If you are going to go endurance racing your TR6, you
should have a remote filter setup anyway which will allow you to connect an
oil cooler inline with the remote filter... so all of your oil is cooled.
And just for some photographic substance... here is a new spin-on filter
adaptor side by side with the spin-on adaptor for use with an oil cooler
(plugged - as recieved from Mocal). The adaptor on the left in the photos
is the standard adaptor, the one on the right, for use with an oil cooler.
http://server1.wishboneclassics.com/adaptor/oilspin01.jpg
Oil cooler internal passage highlighted on the right.
http://server1.wishboneclassics.com/adaptor/oilspin02.jpg
As cast on the left in standard form; drilled, tapped and plugged on the
right for an oil cooler.
http://server1.wishboneclassics.com/adaptor/oilspin03.jpg
Another opened up internal bore for the oil cooler on the right.
Looks like I should wash the shop floor before the weather gets any cooler.
Too many dirt spots showing up in the photos!
Kai
--
Kai M. Radicke
Wishbone Classics
* British Car Parts *
www.wbclassics.com
Ph: 215.945.7250
Check out the new British Cars Forum:
http://www.team.net/the-local/tiki-view_forum.php?forumId=8
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