Hello,
I am new here and have lurked for a while as I am swapping an engine in my F-150. The forum has been a wealth of knowledge...and thank you.
I got a great deal on a 1995 T-Bird 4.6l with 60K on it.
I had to change a few things and dill the block for the Knock Sensor
but it is going well.
I have one problem that makes me want futher advice on.
The older Romeo engine does not have a 12mm x 1.75 hole drilled in the head
for the CHT sensor.
I would like to drill the crossover in the manifold to accept it as it is off.
The head casting boss is a bit different and I am concerned drilling into it without knowing what is on the other side.

Do any of you experts here have any insight as to whether the temp would be too far off from the normal head position for the CHT to operate properly?

I don't see how it would be that much different....it is not far from the crossover....and i know from experience that the crossover has been drilled on other Fords with success...such as the PI intake swap.

Thank You for your help,

Jeffrey

 

Nobody?

Jebby

 

Drilling it into the crossover is no bargain. The cht and ect can run from 8*-15* difference. There is not sufficient material to do it anyway.

I drilled some FRPP heads and the cht works correctly.You will have to verify that there is enough meat in the boss to drill a hole just the size of the probe portion of the sensor and then use a nut on the threaded portion of the sensor to take up some space. The hole you drill needs to be the exact diameter of the sensor's tip and the exact depth of the tip portion. Use lots JB Weld around the new nut. Mine has about 35k on this installation without issue. The sensor does not have to be centered in the boss.
Sorry for the tiny pic.

 

ONELOWF.....thank you for your reply......Have not been on for a while.
Your point about the Temp. difference bothers me as I have read that it could affect the air/fuel ratio.
I am going to drill carefully into the head with a small bit to see how thick the material is there......after I know it will give me better insight into what I should use to fasten the sensor.
If it is thin...I will drill it for a brass plug....say 3/8 NPT then drill the center of that for a 12mm x 1.75, which is what the sensor has for threads.

Thanks!
Jebby

 

Here's a better pic.

 

Great photo thanks.....
Did you not drill deeper due to not knowing how much
Meat was in the head?

Jebby

 

No, not deeper. I had the luxury of using a drill press, and drilled a hole that was exactly the size of the sensor's tip, a snug fit.

 

And a fresh casting for the JB weld to stick to!
Drilled mine last night.....used a 5/16 drill....the sensor
was .314......the .3125 drill worked out perfect with a little "wiggle"
room. I drilled exactly the depth of the sensor tip and did not
break through.
Thank you so much for the help!

Jebby

 

I would like to add that the truck runs perfect.....no codes and
silky smooth.
This is a viable option for F-150 owners who need to open up
their engine options.....
There are literally hundreds of 4.6l car engines on e-bay
and they are less than half the money of the truck engine.

If you are willing to swap the water pump, oiling system, and of course intake
you can put an engine in one of these dirt cheap.

I scored a 58,000 mile engine from PA....and swapping it out even with truck freight and parts ran me $900. A real bargain.

I even found that most of the gaskets are reusable....albeit with a skim coat of RTV.

One will have to drill the valley pan/block to accept the knock sensor as well.
I did this while the oil pan was off and carefully sprayed out any shaving with brake cleaner.

This is not an easy engine to remove and replace though......be patient and take your time.

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Any questions one may have feel free to ask......

Thanks!
Jebby