Hi all, I've got a coolant temp gauge. Had a quick look - started pulling the coolant plug out near the water pump. Noticed straight away that the thread was NOT 1/8" NPT - so my coolant temp sender was never going to fit.

I need an adapter, but which one? Sensor is 1/8" NPT , I suspect the coolant plug is M14 x ???

Thanks for the info! So far I have EGT, tranny temp, boost, engine oil temp, and fuel pressure fitted. I got the fuel pressure sender adapter from Riff Raff, but cant see any coolant sensor adapters listed anywhere!

 

I think it is 1/2 inch NPT. (national pipe thread).

 

I just found this on Diesel Manor:

Install Pictures

7.3L Ford Powerstroke Motor
This port in the side of the water pump housing it plugged with a 5/16" square drive 3/8"NPT plug. Simply remove the plug and install a 3/8"NPT to 1/8"NPT adapter and screw in the sender. On this 2000 Ford 7.3L Powerstroke we are installing the water temp sender in a "T". This is due to the customer's installation of an aftermarket coolant filter requiring a hose connection.

So 3/8" NPT is the one?

 

If I recall correctly, it is 3/8" NPT.

Pop

 

Thanks Pop! Ordered one and it's on the way. Looks like I've got yet another PMS project for next w/e!

 

Anyone know where to get a 5/16" square drive? I'm trying to get my plug out to install a coolant filter. Do you have to make it?

 

Wayne good luck with that little SOB! Mine was stuck tighter than a nuns patuty, it was so mangled by the time I got it out it was unrecognizable. Maybe I should have PB blasted it for a week before I started idk.

 

My waterpump was new, last spring, so I'm hoping it wont be too tight.

 

Yea hopefully your will come right out. I kinda just chalked mine up to my kinda luck. I did find out there is enough meat in the hole to run a tap in, cause my plug brought a couple threads with it. Like I said my kinda luck, yours will probably come right out.

 

You should be able to get a 5/16 square drive or 8 point socket (both will work) from Snap On or Mac Tools. If you see one of those tool trucks parked somewhere just hop on and tell them what you need.

 

Thanks for the info, and sorry for the hijack of the thread!

 

I just realised you guys are talking about an Outee 5/16" square drive. I have an Inee square drive recess and the 3/8 or 1/4 doesn't fit. Has anyone else came acros this?

 

A short half-inch bolt and a bench grinder can be your friends.
Hint:



Pop

 

That's a good idea there Pop. I was gonna suggest a inch or so of 5/16 square stock.

 

I figured it would come to that.
Thanks, Marv!