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Topic: Temperature sending unit

in Forum: C3 Engines

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Temperature sending unit

Posted: 11/1/08 7:52am Message 1 of 5
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longhorn294
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DeBerry, TX - USA
Joined: 2/27/2002
Posts: 1006
Vette(s): 1971 383 Stroker- mille miglia red...5 speed
 The aluminum heads I put on my engine don't have the same size hole to screw the temp sending unit into as the original. These heads have a 5/8 hole where the original was 3/4". We moved it to the intake, which is a pain because it's under the raditor hose and neck, plus, it doesn't register right. It will show anywhere from 210 to 240 degrees when I know it's not hot. Anyone else run into this problem and know of a 5/8" sending unit that will go back in the head and be accurate?


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Temperature sending unit

Posted: 11/1/08 9:23am Message 2 of 5
mkapp7879
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Joined: 10/21/2003
Posts: 1220
Pretty sure the 81-82 temp sending unit is smaller, just not sure what size it actually is, tho.


Temperature sending unit

Posted: 11/1/08 9:49am Message 3 of 5
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longhorn294
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DeBerry, TX - USA
Joined: 2/27/2002
Posts: 1006
Vette(s): 1971 383 Stroker- mille miglia red...5 speed
 I did try a couple of 5/8" units, but the readings were way off. Were there other years that had the same kind of temp gauge as the '71 but were 5/8"instead of 3/4"?


   I know the voices aren't real, but they have some pretty cool ideas...

Temperature sending unit

Posted: 11/1/08 12:57pm Message 4 of 5
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lukesvette
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HOWELL, NJ - USA
Joined: 5/18/2004
Posts: 6812
Vette(s): 1979, Targa Blue (72 Color), Pace Car rear spoiler, L88 hood, Dark blue factory interior, 525HP 406, HD 700R4, 370 gears,Steeroids, composite rear spring, TT IIs wrapped in T/A Radials.

Go to a plumbing supply and buy a 5/8 to 3/4 adapter. Did that a couple of times and woprked out OK...




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Temperature sending unit

Posted: 11/3/08 10:05am Message 5 of 5
VetteSpecialties
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Mounds View, MN - USA
Joined: 5/24/2007
Posts: 1031
Vette(s): 70 LT1 coupe, 69 350 HP coupe, 69 390HP 427 coupe, 71 LS5 convert, 85 coupe, 93 coupe
It is also OK to put the sender into the intake manifold, as long as it is not in the thermostat housing above the thermostat.

Larry



in Forum: C3 Engines


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