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Temperature Transmitter

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Musicman

Musicman

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I'm curious. Can the temperature transmitter in the thermostat housing be removed and replaced without losing any coolant? What would the correct steps be to do this?

Thanks!
 
No. You have to partially drain the system to get the fluid level below the temp sending unit. /ubbthreads/images/graemlins/frown.gif
 
I swapped mine (on a TR4) w/o draining anything. I lost some coolant but no more than could be caught by a paper towel. I had the replacement ready, undid the old, put my left thumb over the hole (while i gathered my wits for the next move) and then started the new one in.

On a cold engine with the radiator cap still in place the flow out of that opening is real slow -- it's near the high point of a closed system.

OTOH, draining is easy enough or you could even use a siphon or turkey baster at the radiator cap as you may only need to lower it a bit.

Note: these comments are for a TR4... if a TR6 sender is located low in the system rather than up on the tstat housing then disregard.
 
I can confirm Geo's comments. I've replaced the sending unit on my TR4 without draing any coolant and minimal loss out of the hole when the old unit was removed.
 
Same here with both a 1500 and a GT6. I'm pretty sure the waterpump housings are essentially the same for the TR6.
Just make sure the engine is cold when you try this! /ubbthreads/images/graemlins/grin.gif
Jeff
 
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