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5.7 temp gauge and EFI temp sensor #2678864
07/18/19 08:57 PM
07/18/19 08:57 PM
Joined: Mar 2005
Posts: 1,127
Michigan
392Hemi Offline OP
super stock
392Hemi  Offline OP
super stock

Joined: Mar 2005
Posts: 1,127
Michigan
I think I have a small problem, I have my temp gauge electric sensor that I had on my old manifold from my 415, next to that in the other hole I had the EFI temp sensor. On the 5.7 I only have one npt hole. I need the temp sensor for the efi and I still want my gage to work.

any ideas?

Re: 5.7 temp gauge and EFI temp sensor [Re: 392Hemi] #2678866
07/18/19 09:10 PM
07/18/19 09:10 PM
Joined: Nov 2004
Posts: 24,760
Texas
GoodysGotaCuda Offline
5.7L Hemi, 6spd
GoodysGotaCuda  Offline
5.7L Hemi, 6spd

Joined: Nov 2004
Posts: 24,760
Texas
I tapped 1/8"NPT threads near the thermostat housing for my electronic gauge. My ECU looks at the stock sensor.

Hemismall.jpg

1972 Barracuda - 5.7L Hemi, T56 Magnum 6spd - https://www.facebook.com/GoodysGotaHemi
1976 Dodge Warlock - "Her Truck" - 360/727 2wd
2016 Subaru WRX - E30 Tune ~320whp
[img]https://i.imgur.com/v9yezP9.jpg[/img]
Re: 5.7 temp gauge and EFI temp sensor [Re: GoodysGotaCuda] #2678934
07/19/19 03:27 AM
07/19/19 03:27 AM
Joined: Jan 2003
Posts: 27,259
Balt. Md
3
383man Offline
Too Many Posts
383man  Offline
Too Many Posts
3

Joined: Jan 2003
Posts: 27,259
Balt. Md
On the later years from around 2004 or somewhere around there Mopar started using just the one PCM coolant sensor for the PCM and the temp gauge. They actually started having the temp sensor hooked only to the PCM. Then the PCM uses it to know eng temp and it also sent that info over the buss to the instrument cluster so it could operate the temp gauge. Without the factory setup you will have to find or make a separate threaded hole for a stand alone temp gauge. Ron

Re: 5.7 temp gauge and EFI temp sensor [Re: 392Hemi] #2678989
07/19/19 09:29 AM
07/19/19 09:29 AM
Joined: Jul 2019
Posts: 69
Springtown Pa
R
Ray408G3Hemi Offline
member
Ray408G3Hemi  Offline
member
R

Joined: Jul 2019
Posts: 69
Springtown Pa
On my daughters D100 we used the 04-08 car timing cover, the back of the block(the passages that go no where) had been tapped and the Heater hoses connected to them , That's where we put her mechanical gauge , installed at-fitting .


2010 Challenger 10.30 @ 132MPH 408CI G3ci NA
2001 Lighting 9.01@ 148MPH 5.4 Mod Motor
1993 Lighting 10.61 @ 129mph 408Ci A3 headed NA
1974 D100 9.98 @ 137 496 CI HEMI
1968 Mustang slow a$$ 428 FE
Re: 5.7 temp gauge and EFI temp sensor [Re: Ray408G3Hemi] #2678990
07/19/19 09:33 AM
07/19/19 09:33 AM
Joined: Mar 2005
Posts: 1,127
Michigan
392Hemi Offline OP
super stock
392Hemi  Offline OP
super stock

Joined: Mar 2005
Posts: 1,127
Michigan
I think I am going to drill and tap a new hole opposite side of the factory location on the front top of block. its the triangle area just behind the front cover. on the drivers side there is a boss that I have the efi sensor in so I am going to drill and pipe tap just opposite of that. and hope for the best. should work just fine. cross my fingers. I will let you all know how it works out.

Re: 5.7 temp gauge and EFI temp sensor [Re: 392Hemi] #2679209
07/19/19 08:03 PM
07/19/19 08:03 PM
Joined: Mar 2005
Posts: 1,127
Michigan
392Hemi Offline OP
super stock
392Hemi  Offline OP
super stock

Joined: Mar 2005
Posts: 1,127
Michigan
All done, i figured i would screw this up somehow. But not this time

20190719_195254.jpg
Re: 5.7 temp gauge and EFI temp sensor [Re: 392Hemi] #2679309
07/20/19 05:06 AM
07/20/19 05:06 AM
Joined: Jul 2019
Posts: 69
Springtown Pa
R
Ray408G3Hemi Offline
member
Ray408G3Hemi  Offline
member
R

Joined: Jul 2019
Posts: 69
Springtown Pa
Originally Posted by 392Hemi
All done, i figured i would screw this up somehow. But not this time



Looks good to me.


2010 Challenger 10.30 @ 132MPH 408CI G3ci NA
2001 Lighting 9.01@ 148MPH 5.4 Mod Motor
1993 Lighting 10.61 @ 129mph 408Ci A3 headed NA
1974 D100 9.98 @ 137 496 CI HEMI
1968 Mustang slow a$$ 428 FE

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