This is the original style heater valve from a mid mileage TR6.
Note the bottom of the rivet showing at the center of the
valve, where the top and bottom are twisted together with the
over lapping tangs. This keeps it from turning itself off
view of the opposite side. As you can see, the top twists
off like a jar lid after the rivet is removed.
clip on the top will have to come off, but first it's time to
drill out the rivet.
I prefer to
clamp things in a press vise to keep them aligned, as I hate to
have a drill slip and ruin the hole size.
requires a 1/8" or .0125" drill and come off very easily.
The rivet is out and I've
begun to turn the top so you can see two tabs that held the
rivet bottom from turning.
The shaft retaining clip is
also removed from the top of the cover so it will lift of when
released from the tangs.
You can see that it's about a
45 degree twist across the base to release all of the tabs.
Off comes the top and the
diaphragm and shaft are shown in the base. This just lifts
And this is the top with the
lever, bushing (hidden) and the clip for the top.
And the top side before
taking it apart.
These parts just slide out.
Now for the bottom of the
Side view, but you will see
it better down the page after it's cleaned.
So here's all of the pieces
ready for cleaning / plating / rebuild.
Here's the top of the
diaphragm with the lid off showing what I've been told as hard
And the bottom, with what I
thought was a rind under the bottom plunger.
This view shows the bottom
casting with the shaft hole for the plunger and the exist hole
to the pipe which goes to the heater core.
After some discussion on
6-Pack, I decided to soak these parts overnight in 50/50
mix of CLR and water.
Bottom views of the same
parts, but look at the diaphragm.
There is a spring under the
plunger that was collapsed and stuck together or bound up.
I wonder if this is when
these valves start to become VERY hard to close and open rather
than just plain hard to open?
After a few
minutes on the bench polisher, this one isn't too bad.
More on this later.
Here's the remainder of the
parts after an eight hour soaking in the 50/50 CLR/Water mix.
Not too bad at all.
And this is after about five
minutes of polishing on the bench polisher.
I've got some work to do to get rid of the marks, but it will
happen when I have the time.
Once I get a reply from Peter
at NOS Imports, my parts will be polished, chrome plated or sent
as is for their work to improve the valve.
NOS Imports aka
World Wide Auto Parts of Madison, Inc.
2517 Seiferth Rd. Madison, WI 53716
Local (608) 223-9400 Fax (608) 223-9403
WATS (800) 362-1025