Rob x-7

My back-ordered gauge came in today, is this sender going to fit in the thermostat housing? The sender is at least 2" long, and it has a 1/2 npt fitting on it.

13BAce

You should be able to tap into the housing, but the water pump would be more ideal because it will allow for you to get an accurate reading before the thermostat opens.

Rob x-7

So I will have to remove the pump to do this? Or can I remove the hose, plug the hole VERY VERY carefully, then drill and tap? If im removing the pump, a new one will go back on. The sender will clear the impeller and all the other internals as well?

13BAce

If you want to tap the thermostat housing then you could just remove that one part. To tap the water pump you would have to remove the pump. For 1/2" NPT an 11/16" drill bit should do ok(the official recommendation is 45/64"). If you tap underneath the stock water temperature sender it should clear the impeller. Why would you replace the pump? They usually last quite a while.

Rob x-7

Its been on there since I got the car, so I figure I can just get another one, tap it, then swap it out, I dont know what to do, I want the gauge to work well, but I dont want jink myself with any problems putting the old pump back on, and by some chance overheating it and kicking myself in the *** for not replacing it while I had it off! Cant I just tap the thermostat housing and pick the temp up from there? I cant see it being any different other then getting the temp upstream of the radiator, which is what I think I would rather see then the temp before the radiator?

13BAce

Doing the thermostat housing will work ok.

Rob x-7

Ill install 2 and see the difference the radiator makes, lol

jmseven7

I dont know if anyone knows...but, the automatics had 2 sensors on the waterpump housing. One for the front fan and the other for the CPU.



You can do it cleanly with this unit.

13BAce

That's only for 89-91 TII's and A/T cars. 86-88 TII's and A/T cars have the second sensor in the thermostat housing.

Rob x-7

See, he really is a 13b ace. Think we can follow each other to the BBQ? That is if you mind going the speed limit.