Heater Valve 2011
March 19, 2017

 

Home
About our TR6
Six Tech Manuals
1980 TR8
5 Vane Water Pump
Convertible Top 2013
Exhaust Manifold 2013
Voltage Stabilizer 2012
Space Saver Spare
Trafficator 2012
Parts Sale 2011
BobbyD Fender Blanket
Fuel Pump 2011
Brake Adjusters 2011
Heater Valve 2011
Console 2010
Dyno Day 2010
95 Amp Alternator
CV Axles T/A Repair
Fuse Panel Conversion
Miata Seat Conversion
Hardtop Restoration
Hardtop Carrier
Luggage Rack
Gauge Calibration
Gauge Refurbishing
NET DOT 2009
Repainting 2008
Dash Replacement
Machining Block 2008
Machining Head 2008
Cam Bearings 2008
Thrust Washers 2008
Engine Assembly 2008
Engine Installation 2008
Silicone Cover Gasket
Fuel Pump Rebuild
Damper Rebuild
Throttle Pedal Rebuild
Ratco Cable Linkage
Air/Fuel Ratio Meter
PDWA Rebuild
Rheostat Rebuild
Alternator Swap
Frame Parts & Coating
Frame Parts Assembly
Frame Before Stripping
Frame Strip & POR15
Brake Restoration
Cylinder Head Swap
Triple Carb Rebuild
Triple Carb Installation
Roadster Factory Tour
Spring 2007
Dyno Day 2007
Engine Restoration
Paint Detailing
Glass Replacement
Bumper Rechroming
Distributor Overhaul
Distributor-Adjustable
Clutch Replacement
Carpet Replacement
Differential Overhaul
Heater Overhaul
Past Improvements
Favorites

 


This is another attempt to show what is really inside another of the parts that cause us aggravation when they are working poorly and or start to leak, which always happens at the worst possible time.  Some of the after market choices are worse than any original ever was, so I decided to take an original apart after reading several threads on the 6-Pack Forum about a rebuilder in Wisconsin named NOS Imports, Inc., having a fix for these that makes them work much smoother and helps prevent future leaks.  I don't quite know what will be done, but I wanted to know what this was all about before I sent it out and I also wanted to polish it or plate it to add a little more bright stuff to the engine compartment.

**** Viewers are warned that if they attempt any mechanical repairs or modifications,
or follow procedures referred to here, they do so at their own risk, and no liability will attach to me.****



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 or loose.

 

Another view of the opposite side.  As you can see, the top twists off like a jar lid after the rivet is removed.

The 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.

This 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 out.

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 diaphragm.

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 water corrision.

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

 

74TR6.com 2017

Home | About our TR6 | Six Tech Manuals | 1980 TR8 | 5 Vane Water Pump | Convertible Top 2013 | Exhaust Manifold 2013 | Voltage Stabilizer 2012 | Space Saver Spare | Trafficator 2012 | Parts Sale 2011 | BobbyD Fender Blanket | Fuel Pump 2011 | Brake Adjusters 2011 | Heater Valve 2011 | Console 2010 | Dyno Day 2010 | 95 Amp Alternator | CV Axles T/A Repair | Fuse Panel Conversion | Miata Seat Conversion | Hardtop Restoration | Hardtop Carrier | Luggage Rack | Gauge Calibration | Gauge Refurbishing | NET DOT 2009 | Repainting 2008 | Dash Replacement | Machining Block 2008 | Machining Head 2008 | Cam Bearings 2008 | Thrust Washers 2008 | Engine Assembly 2008 | Engine Installation 2008 | Silicone Cover Gasket | Fuel Pump Rebuild | Damper Rebuild | Throttle Pedal Rebuild | Ratco Cable Linkage | Air/Fuel Ratio Meter | PDWA Rebuild | Rheostat Rebuild | Alternator Swap | Frame Parts & Coating | Frame Parts Assembly | Frame Before Stripping | Frame Strip & POR15 | Brake Restoration | Cylinder Head Swap | Triple Carb Rebuild | Triple Carb Installation | Roadster Factory Tour | Spring 2007 | Dyno Day 2007 | Engine Restoration | Paint Detailing | Glass Replacement | Bumper Rechroming | Distributor Overhaul | Distributor-Adjustable | Clutch Replacement | Carpet Replacement | Differential Overhaul | Heater Overhaul | Past Improvements | Favorites

This site was last updated 03/19/17