Ok I should be re-installing my built shortblock either late this week or early next week and have a question regaurding the pi swap that I'm doing at the same time.
Going from a 98 f150 non pi 4.6l to a pi 4.6l. I have the heads assembled and ready. I have the intake almost ready. Which brings me to my question, the non pi intake uses 2 coolant temp sensors and the pi intake uses one. Instead of drilling the intake for the the second sensor could I just use a T fitting?????
Basically running both sensors off the same hole. Or would this throw the sensors off?

 

Nobody knows??? Guess I'll be the first to try

 

seems like it would work?

 

I would think you would have an air pocket in the "T", which would throw the sensors off. When they are in the intake, there is coolant flow across them.

 

I think one member on here put a T in a heater hose, and put one of the sensors there.

 

I hadn't thought about the air pocket. Hmmm i guess the heater hose T would be a better option since I have to get new hoses anyway.

 

Heater hoses won't work because you would only get coolant flow if your heater is on. The upper radiator hose would be the next option to the intake.

 

Just drill out the hole, tap it, and install the other sensor. Shouldnt be a problem.

 

No, it won't throw anything off, not that I know of anyway. It's done all the time. I think Watts sells a T that's close quartered, if your concerned about it.

To tap and thread the intake could perhaps provide a cleaner install. The problem with doing that, - the intake may be to thin. You can build a foundation to except the drill and tap procedure or Tig in a bung.

I understand the thought behind a possible problem integrating a T with the coolant hose, - but there really hasn't been one in the past.

 

There is always coolant flowing in the heater hoses, whether the heater is on or not.

 

My bad, I thought it had a heater control valve.

 

The issue with flow from the heater hoses won't be one. My heater core has been bypassed for about 2 years. (just call me lazy removing the dash is not my idea of a great weekend). The reason for not wanting to drill and tap this intake is that the area to be tapped is rather thin IMO.

 

I told yuh it was , - But like I said earlier, - you have a few options.

 

I needed a third, so welded on a piece of aluminum near the stat and tapped. Sorry about the tiny pic.

 

What happen to your pics, you had some good ones ? Big pics !