1992, engine runs at low temperature
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1992, engine runs at low temperature
Highway , march in Maryland, pretty cold weather. Cruising 50-60mph , engine temperature around 140f. In traffic temperature climbs up, 180f and above, fan starts working.
Le Mans Master
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From: Clearwater Florida
..... Sounds pretty normal to me if the gauge sender is in a cylinder head , though I'm not positive as to where the gauge sender is located on LT1's ... If I recall the ECT sender is in the water pump ... remember , the whole design idea behind the LT1 motor is the reverse flow cooling where the cooled water from the radiator enters the cyl heads first then on to the block ...........
Melting Slicks
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From: Palmdale CA
The Lt1 use's an 180° thermostat from the factory. It sounds like your Tstat is partially stuck open, this happened to me, and it turned out to be a piece of (plastic) stuck under the valve.
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If the temp readings are accurate, I would think there is no thermostat installed. The 130 and 140 readings are just not right for an LT1. The digital displayed coolant temp will be more accurate than the analog gauge.
Normal operating temps should be 180-195 when cruising, even up to 200. It's not uncommon to see 200-ish temps in city traffic even when the air temp is in the 40's.
Normal operating temps should be 180-195 when cruising, even up to 200. It's not uncommon to see 200-ish temps in city traffic even when the air temp is in the 40's.
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If the temp readings are accurate, I would think there is no thermostat installed. The 130 and 140 readings are just not right for an LT1. The digital displayed coolant temp will be more accurate than the analog gauge.
Normal operating temps should be 180-195 when cruising, even up to 200. It's not uncommon to see 200-ish temps in city traffic even when the air temp is in the 40's.
Normal operating temps should be 180-195 when cruising, even up to 200. It's not uncommon to see 200-ish temps in city traffic even when the air temp is in the 40's.
Also possible.
OP, set your heat to high and see how hot it gets.
If the temps your listing are accurate, the temp coming out of the heat vents will be luke warm at best.
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Racer
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From: Toledo
probably not the gauge but sender. I thought I read the LT1 has two temperature sending units. One for the computer and one for the gauge. If fans are kicking on I would think the temperature is getting hot enough to activate the fans. My guess is the sender unit for the gauge is in accurate. I like the idea of feeling how hot the heater is getting. This should be a good first step to troubleshooting.
Other possibility; you have a air in the coolant system causing cavitation of the pump. The coolant in the head is hot, telling computer to activate the fans, the sending unit near thermostat is cooler because of lack of fluid flow or stuck closed thermostat.
Other possibility; you have a air in the coolant system causing cavitation of the pump. The coolant in the head is hot, telling computer to activate the fans, the sending unit near thermostat is cooler because of lack of fluid flow or stuck closed thermostat.
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probably not the gauge but sender. I thought I read the LT1 has two temperature sending units. One for the computer and one for the gauge. If fans are kicking on I would think the temperature is getting hot enough to activate the fans. My guess is the sender unit for the gauge is in accurate. I like the idea of feeling how hot the heater is getting. This should be a good first step to troubleshooting.
Other possibility; you have a air in the coolant system causing cavitation of the pump. The coolant in the head is hot, telling computer to activate the fans, the sending unit near thermostat is cooler because of lack of fluid flow or stuck closed thermostat.
Other possibility; you have a air in the coolant system causing cavitation of the pump. The coolant in the head is hot, telling computer to activate the fans, the sending unit near thermostat is cooler because of lack of fluid flow or stuck closed thermostat.
Last edited by antfarmer2; Mar 30, 2015 at 09:30 AM.
Burning Brakes
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From: That one city...you know that one. Idaho
Drifting
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From: Trieste Italy
Had same issue on my 1995 ( i was without t stat)
Last edited by Christi@n; Mar 30, 2015 at 10:10 AM.
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From: Trieste Italy
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Drifting
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From: Trieste Italy
I've just said to remove it to get acces to the t stat housing, then re-put it on Throttle body and air cleaner house, after t stat replacing
P.S. (As Throttle body intake i meant rubber hose from air clenar to Throttle body) hope its correct therm, intake manifold is another thing, it is immediately after throttle body,
Wait for someone that confirm this therms
Intak
Last edited by Christi@n; Mar 30, 2015 at 05:17 PM.