Where is the best place to put the sender for my mechanical water temp guage on my 89 ctd? i currently have it in the top of the head that takes a 3/8 drive to get out but my guage is not giving me any readings. I need help please

 

You have an air bubble there. Loosen your sender fitting to burp the air out and it will read.

 

i will try that once i have it runnin again

 

While on the subject, where are some better options to locate a mechanical sender ??

One reason for having the gauge in the first place is to alert one to a loss of coolant; but when the coolant level drops the least little bit, a sender in that location is left high and dry and just drops to ZERO, regardless of engine temp.

I would like to plumb mine into somewhere that is more apt to stay submerged.

 

You could replace the factory sender. It's kind of in an annoying spot to work though.

 

is the factory spot in the rear of the head on the drivers side?

 

That's correct.

 

what size is that dang big hole is it a standard size like for a gassers temp gauge,or is there an adapter.or can i put it at the allen headed plug at the water neck?

 

wheres a good place to put one cause this new motor will have all mechanical gauges.as for oil pressure i figured id use the factory sending unit plug after i take out the plug.am i on the right track

 

Could you put one on the 1/2" plug right next to the top thermostat housing?

 

thats the one i was thinkin of but i dont know if it would be too shallow and hit the head.i could be wrong though

 

That is where i put mine in, but i was asking about the same question. I have been wondering if the probe from the sending unit messes with the thermostat.

 

never thought of that good point,would it?

 

im not sure. hopefully Wanna will chime in and tell us

 

I also would like more info. I am going to be installing a isspro water temp but would also like the factory gauge to work. I just spent 70 bucks on a new sender for the factory gauge last summer. I , for the life of me can not remember where my old 89's used to be hooked up. It was twords the front of the engine somewhere. Just cant picture it.