"Rocket",
Take the glove box off and up on the left you will see 2 heater hoses. Pinch off (I used small vice-grips) about 5" apart, cut a 2"-3" section of the lower (closest, easiest to work with) hose out, insert the TK valve, tighten the stainless clamps, put the glove box back on and yur good to go.
Catch the 2 tablespoons full of coolant in a rag or something. I put a large tarp on the floor and it worked well ... kind like a big "pan".
Oh, by the way, be sure the yellow valve is in the closed position before putting the glove box back on.
 
This is the easiest way to access and turn the valve back to open without getting on your back, under the van.
 
Mine works wonderfully! ;>)
 
Bob
'87 Syncro Westy ... mit muchas cooler feets.> > On 8/1/2007 10:43 AM Tom Buese wrote:> > > I may be deluding myself, but> > Are you closing the heater levers in the proper Rubik's combination so> > that there is no heat coming out, but only nice fresh air?> > Howdy, Tom. Yep, second valve from the top all the way to the left is> meant to turn off hot water to the heater core. Can't tell for sure if> it does what it is supposed to do, fully, but I do know that my toes get> baked on a hot day. The ventilation box thing has funky seals and the> air can't be shut off all the way, either, so that may be part of my> trouble, too. However, removing the dash is the way to get to that> thing. Removing the dash is also, I am told, a miserable job.
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