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How To Rebuild a Heater Valve


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I have gone through a few heater valves. guts break, replace whole valve with another used valve, repeat. enough.

this time i bought a rebuild kit from BLUNTTECH. why buy a new valve when the brass part does not wear out, the kit includes EVERYTHING but the brass shell. rebuild is a VERY simple process.

 

so what do you need for this job?

 

  • old valve
  • rebuild kit
  • flat blade screwdriver
  • phillips head screw driver
  • 7mm wrench
  • small pick
  • brass cleaner
  • Dremel with wire wheel

 

NOTE - this is just the rebuild of the later "big" heater valves and does not include the removal or install of a valve.

 

The kit and the broken valve

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remove two screw with flat blade, take cover off.

 

2013-12-14_12-10-09_343.jpg

 

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now use 7mm wrench to unbolt control arm from back

 

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remove broken guts

 

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old and new guts. new looks much stronger.

 

2013-12-14_12-13-45_738.jpg

 

very important part here. main reason these valve fail (at least from all the ones i have taken apart) is that the inside of the valve corrodes in one spot becoming rough. Particularly true if the valve sits in one open or closed position for a long time. the plastic guts then hang up on the corroded area of the shell and break.

 

clean the inside of the brass shell until nice smooth and shiny. i used some 600grit and a dremel wire wheel to do this, then polished with metal polish like ibis or brasso.

 

2013-12-14_12-34-28_701.jpg

 

now assemble the guts

 

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don't forget the o-ring on shaft

 

2013-12-14_12-45-34_351.jpg

 

i used a little teflon grease on all the parts.

 

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assemble

 

2013-12-14_12-35-26_241.jpg

 

 

now grab the cover. remove old o-ring with pick

 

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same cleaning and polish rule applies to cover

 

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install new o-ring

 

2013-12-14_12-52-35_401.jpg

 

okay now put cover on the valve. note the position and alignment of the guts and the arrow on the cover.

 

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use the new screws and lock rings to assemble (new parts are phillips heads)

 

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put the control arm back on with 7mm wrench. don't forget the little washer.

 

2013-12-14_12-56-28_425.jpg

note position of arm and open/closed valve. we are looking at the HEATER end of the valve in these picks.

 

2013-12-14_12-57-03_701.jpg

 

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DONE! :)

bagged up and ready for install at a later date.

 

2013-12-14_13-01-35_361.jpg

 

 

 

 

 

 


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