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#85070 08/05/2004 1:05 AM | Joined: Mar 2004 Posts: 734 Shop Shark | | Shop Shark Joined: Mar 2004 Posts: 734 | Alright, here's one for y'all to ponder. Every day, I drive to work at 2:30 in the afternoon and my temp gauge is right where it should be. Every day, I drive home from work at 11:30 at night and my temp gauge is close to being pegged on the hot side. Every day for the last few weeks it's been like this. There's no evidence of things actually overheating.
The only thing that's different when I drive home is my lights are on 'cause it's night. This afternoon on the way to work I turned my headlights on to see what would happen. Gauge was right where it should be. Hmmmm... | | |
#85071 08/05/2004 2:57 AM | Joined: Aug 2003 Posts: 264 Member | | Member Joined: Aug 2003 Posts: 264 | Twilight zone. My guess was that turning on the headlights was pulling the voltage down, thus affecting the electric sender circuit. That of course is assuming you have an electrical sender. But since it is not doing it during the day, I am currently stumped. | | |
#85072 08/05/2004 3:36 AM | Joined: Feb 2004 Posts: 110 Wrench Fetcher | | Wrench Fetcher Joined: Feb 2004 Posts: 110 | mugsy,
This is a longshot, but if you have a fan clutch the temperature control in the clutch could be effecting the turning of the fan between the day time outside temp and the night time temp. This is the only thing that comes to mind. If you don't have a fan clutch, try a new sending unit on the engine. Otherwise, I'm baffled, too.
Truck Tinker | | |
#85073 08/05/2004 4:18 AM | Joined: Mar 2004 Posts: 734 Shop Shark | | Shop Shark Joined: Mar 2004 Posts: 734 | Nope, no clutch fan. Yeah, think I'll throw a new sending unit in and see what happens. Maybe there's a little gremlin running around my engine compartment. Like the one William Shatner saw out the window of the airplane on that old Twilight Zone episode. | | |
#85074 08/05/2004 3:05 PM | Joined: Apr 2002 Posts: 1,571 Shop Shark | | Shop Shark Joined: Apr 2002 Posts: 1,571 | Looks like you have a "Nightmare at 3 feet!" :p  | | |
#85075 08/08/2004 3:09 PM | Joined: Jun 2004 Posts: 8,597 Riding in the Passing Lane | | Riding in the Passing Lane Joined: Jun 2004 Posts: 8,597 | Check your grounds. Dash board, engine to chassis,
& chassis to body.
They say money can't buy happiness. It can buy old Chevy trucks though. Same thing. 1972 Chevy c10 Cheyenne SuperIn the Gallery Forum | | |
#85076 08/08/2004 4:27 PM | Joined: Feb 2004 Posts: 29,773 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,773 | Is the temp gauge electrical, or a Bourdon tube type? I'd suggest getting one of those infra-red temp checkers, like we use for tire temps on the race track, and doing a little testing at the thermostat housing or radiator top tank while the problem is happening. I'm betting you're having a gauge problem, not an actual overheating situation. The tire temp probes we use at the track register from below zero to 400 degrees F., and cost about 50 bucks. Well worth it, for any tool box. Just point and click, and the electronic readout comes up in about one second.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
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#85077 08/12/2004 5:33 PM | Joined: Dec 2003 Posts: 103 Member | | Member Joined: Dec 2003 Posts: 103 | In a past life I had a 67 GTO, that had been "re-wire" (butchered) by the PO. Turn on the lights and the temp pegged, the oil pressure dropped to zero, when the wipers were on the dash lights increased/decreased in brightness in sysnc with the movement of the wipers. Tried troubleshooting -- ended up just getting a manual and rewiring everything under the dash -- in process found a faulty ground. If you have an electrical diagram look for any commonslities between temp sensor and light circuits. | | |
#85078 08/12/2004 6:25 PM | Joined: Apr 2000 Posts: 499 'Bolter | | 'Bolter Joined: Apr 2000 Posts: 499 | This is not intended to be a I-told-you-so or that I'm trying to be a jerk. I'm just trying to help. Whether you accept that or not is up to you. Good money says your problem can be traced back to. One of your previous posts I would recommend undoing everything you did at that time and start fresh.
'67 GMC 3/4 292 4spd
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#85079 08/13/2004 1:39 AM | Joined: Mar 2004 Posts: 734 Shop Shark | | Shop Shark Joined: Mar 2004 Posts: 734 | Hmmm, I don't know Richard. If things were behaving funny right after I did the HEI conversion than I would've put 2+2 together. But everything was perfectly fine for a month and a half. Then one day a couple weeks ago...
Actually, the temp gauge for the last week has been working, uh, mostly normal.
I'm still gonna put the new temp sender in and see what happens. Already bought it, just haven't installed. | | |
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