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05-03-2013, 09:05 PM
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#1 |
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Registered User
Join Date: Feb 2013
Location: cedar park texas
Posts: 31
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What is this?
Any clue what this is? It's on the driver side of the block between the two front plugs.
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05-03-2013, 09:07 PM
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#2 |
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Registered User
 
Join Date: May 2007
Location: Rapid City South Dakota
Posts: 2,359
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Re: What is this?
Temperature sending unit.
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Turp Mcspray New life for an old 2wd, farm blazer http://67-72chevytrucks.com/vboard/s...d.php?t=505987 My Blazer build http://67-72chevytrucks.com/vboard/s...d.php?t=342299 |
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05-03-2013, 09:09 PM
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#3 |
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Registered User
Join Date: Feb 2013
Location: cedar park texas
Posts: 31
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Re: What is this?
Awesome. Thanks. Any idea where the unit is for the oil pressure gauge?
Posted via Mobile Device |
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05-03-2013, 09:24 PM
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#4 |
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Moderator
 
Join Date: May 2007
Location: Southern Cal
Posts: 19,995
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Re: What is this?
Oil pressure gauge is mechanical, there is no sending unit.
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1972 C/10 Cheyenne Super SWB. Restored, loaded, slammed. 1968 C/10 50th Anniversary LWB. Unrestored, stock, daily driver/work truck. RIP ElJay RIP 67ChevyRedneck RIP Grumpy Old Man |
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05-03-2013, 09:28 PM
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#5 | |
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Watch out for your cornhole !
Join Date: Jun 2003
Location: Azle, Texas
Posts: 14,162
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Re: What is this?
Quote:
Posted via Mobile Device |
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05-03-2013, 11:16 PM
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#6 |
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Account Suspended
Join Date: Oct 2012
Location: Olathe, KS
Posts: 90
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Re: What is this?
As I understand it, the sender you posted is for the temperature gauge. There is one on the passenger side of the block for the Temp. idiot light.
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05-04-2013, 08:34 AM
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#7 | |
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Watch out for your cornhole !
Join Date: Jun 2003
Location: Azle, Texas
Posts: 14,162
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Re: What is this?
Quote:
Posted via Mobile Device |
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05-04-2013, 09:22 AM
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#8 |
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Account Suspended
Join Date: Oct 2012
Location: Olathe, KS
Posts: 90
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Re: What is this?
Mine has them on both sides. Of course it's a 40 year old combination of trucks, who knows what has been done in the past.
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05-04-2013, 12:02 PM
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#9 |
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Registered User
Join Date: Jun 2006
Location: Indiana
Posts: 4,859
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Re: What is this?
The piece on the passenger side in not for an idiot light. It is part of the Transmission Spark Control system (TSC). This was an early attempt at emissions control. The temp switch provided the ground leg for a relay. If the coolant was below 32°, the switch was open and did not provide a ground leg. The other parts were a switch in the transmission that only closed in 3rd gear providing power for a relay. When the engines was warm AND the trans was in 3rd, the relay sent power to a vacuum switch. The Vac switch allowed the vacuum to reach the vacuum advance can on the distributor.
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'70 GMC C1500 LWB Power disc brakes. WooHoo! Posi 6 Lug Dana 60 |
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05-04-2013, 12:35 PM
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#10 |
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Account Suspended
Join Date: Oct 2012
Location: Olathe, KS
Posts: 90
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Re: What is this?
Had no idea!
Mine has nothing attached to it, but I doubt I'm missing anything! |
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05-06-2013, 10:07 AM
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#11 |
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Registered User
Join Date: Jun 2006
Location: Indiana
Posts: 4,859
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Re: What is this?
Most of the TSC part are long gone leaving a unused switch in the trans and unused switch in the passenger head. This stumped me as well, but I actually had ALL the parts, they were just unhooked.
I did sell some parts to a guy doing a concourse rebuild, so don't just throw them out.
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'70 GMC C1500 LWB Power disc brakes. WooHoo! Posi 6 Lug Dana 60 |
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05-06-2013, 10:41 AM
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#12 | |
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Active Member
Join Date: Jul 2007
Location: Centrally located between Houston, Austin and Waco. BCS area.
Posts: 7,947
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Re: What is this?
Quote:
 Wow! Wonder if Rube Goldberg had something to do with this one.
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68 GMC 250/3 speed Saginaw p/b p/s 69 Chevy 350/350 currently in pieces still lookin for a cab 06 Trailblazer I just want a vehicle that I can work on, that won't talk to me, leave error msgs or keep track of how I drive... |
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