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10-07-2012, 08:40 PM
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#1 |
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Registered User
Join Date: Mar 2011
Location: Gainesville, Fl
Posts: 178
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Temp sending unit
Put a set of new Vortec heads on now I need to get a temp sending unit .
The one out of old head is 3/4 threads and the vortec is 1/2 .
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Scott 82 step side aka " Bouncy " 73 GMC Long bed Vortec 5.7 |
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10-08-2012, 09:30 AM
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#2 |
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BAD BOW-Silverado XST
Join Date: May 2000
Location: Senior Member from Austin, TX
Posts: 6,431
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Re: Temp sending unit
Go to a hardware store. You can find a brass fitting to fit the 1/2. An aftermarket sensor with a spade connection will work. I use one on my ZZ4 aluminum heads. Sorry don't know the part numbers. www.jegs.com or www.summitracing.com will have what you need. www.painlesswiring.com is where I ordered my electric fan probe.
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10-09-2012, 06:42 PM
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#3 | |
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78K & 79C Jimmys
Join Date: Nov 2009
Location: Ottawa Ont CANADA
Posts: 7,901
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Re: Temp sending unit
Quote:
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John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350 |
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10-10-2012, 04:29 AM
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#4 |
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Registered User
Join Date: May 2007
Location: New Hampshire
Posts: 349
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Re: Temp sending unit
"The one out of old head is 3/4 threads and the vortec is 1/2 "
If I read it right, he means that the sender he has is 3/4" NPT and the hole in the cylinder head is only 1/2". It's already too big - a bushing won't help. You'll need to get the 1/2" size sender or sometimes the coolant sender hole in the other head is bigger (if you don't mind moving the wire). If it is the right size, put the one you have in the other head. It is also acceptable to use either the thermostat housing (if there is a free hole) or some people even use an available hole in the intake manifold. |
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