thermostat yes or no?
#5
Your engine will run the same temp without a thermostat as it would with the proper thermostat. The thermostat sets minimum engine operating temperature, once it opens the engine will continue to heat to its normal operating temp.
However, running without a thermostat will cause the engine to take much longer to reach its operating temp, which accelerates engine wear and decreases efficiency. You really want it to warm up as quickly as possible, which is what the thermostat does by excluding the radiator from the cooling system until it is needed. Most engine wear occurs when the engine is cold.
Upper hose being swollen sounds like a restriction in the cooling system, like the radiator. But are you saying the hose was not swollen before installing a thermostat?
However, running without a thermostat will cause the engine to take much longer to reach its operating temp, which accelerates engine wear and decreases efficiency. You really want it to warm up as quickly as possible, which is what the thermostat does by excluding the radiator from the cooling system until it is needed. Most engine wear occurs when the engine is cold.
Upper hose being swollen sounds like a restriction in the cooling system, like the radiator. But are you saying the hose was not swollen before installing a thermostat?
Last edited by AZ455; August 23rd, 2012 at 06:22 PM.
#7
what does a stock 71 cutlass with a 350 2bbl take? I ask because I always hear guys switching the temps in the t-stats. why is that? any advantages? for example, your car takes a 180 degree t-stat and they'll switch it out for a 160... or is it the other way around? lol whatever i was just curious..
#8
Yep, need a stat for sure - a 180* is my preference.
How old is you hose? Might be ready for replacement.
An IR thermometer would be helpfult to find what temp your engine is really running at...
How old is you hose? Might be ready for replacement.
An IR thermometer would be helpfult to find what temp your engine is really running at...
#9
If your radiator hose(s) is swollen, you need a new one(s) NOW.
Don't mess around, unless you enjoy the sound of cars and trucks passing you at 70mph on the interstate as you wait for the tow truck.
- Eric
Don't mess around, unless you enjoy the sound of cars and trucks passing you at 70mph on the interstate as you wait for the tow truck.
- Eric
#10
Your engine will run the same temp without a thermostat as it would with the proper thermostat. The thermostat sets minimum engine operating temperature, once it opens the engine will continue to heat to its normal operating temp.
However, running without a thermostat will cause the engine to take much longer to reach its operating temp, which accelerates engine wear and decreases efficiency. You really want it to warm up as quickly as possible, which is what the thermostat does by excluding the radiator from the cooling system until it is needed. Most engine wear occurs when the engine is cold.
However, running without a thermostat will cause the engine to take much longer to reach its operating temp, which accelerates engine wear and decreases efficiency. You really want it to warm up as quickly as possible, which is what the thermostat does by excluding the radiator from the cooling system until it is needed. Most engine wear occurs when the engine is cold.
Why did you remove the thermostat in the first place?, if you had overheating issues removing the the thermostat won't fix it unless it was the fault in the first place, the engine is designed to run with one and removing it won't fix a bad radiator, blown gasket, faulty water pump etc.
Roger.
#11
I'd say it depends on the temperature of your thermostat. If you have a 160 thermostat, the thermostat will not make the engine maintain 160 usually unless your radiator is massive. My car has a 180 but it will still reach its normal ~195 mark. Without a thermostat it would do the same thing, only it would take longer to reach temp.
I understand what you are saying though, OEM thermostats I believe are much closer to the normal temp of the motor they are for, so if the engine began to cool, the thermostat could regulate coolant flow through the rad and warm things back up. I just think it's rare on these cars, because most people are running colder stats it seems, so they are most likely always open. I do also agree that a cooling system in great shape may prevent the engine from ever reaching operating temp if it's not worked hard.
I understand what you are saying though, OEM thermostats I believe are much closer to the normal temp of the motor they are for, so if the engine began to cool, the thermostat could regulate coolant flow through the rad and warm things back up. I just think it's rare on these cars, because most people are running colder stats it seems, so they are most likely always open. I do also agree that a cooling system in great shape may prevent the engine from ever reaching operating temp if it's not worked hard.
Last edited by AZ455; August 24th, 2012 at 08:36 AM.
#12
This is a totally different subject, but I don't believe this is true and is not the/a reason for faster warmups.
#13
That's because you're in blazing-hot Arizona and have a run-down cooling system.
Here in Maine, an engine with a good cooling system will not get nearly that hot without a thermostat (or with one that is stuck open).
The thermostat does two things:
It maintains the engine at a temperature that will provide the most efficient combustion and the least wear, according to the design of the engine, and
It lets the engine get hot enough to throw heat into the passenger compartment in the winter.
If your cooling system is up to par (ie: will keep your engine at its specified temperature in Death Valley on a long uphill pull), then having an open thermostat should keep it well below operating temperature under any ordinary operating conditions. If it does not, then your cooling system needs work.
- Eric
Here in Maine, an engine with a good cooling system will not get nearly that hot without a thermostat (or with one that is stuck open).
The thermostat does two things:
It maintains the engine at a temperature that will provide the most efficient combustion and the least wear, according to the design of the engine, and
It lets the engine get hot enough to throw heat into the passenger compartment in the winter.
If your cooling system is up to par (ie: will keep your engine at its specified temperature in Death Valley on a long uphill pull), then having an open thermostat should keep it well below operating temperature under any ordinary operating conditions. If it does not, then your cooling system needs work.
- Eric
#14
x2. No thermo will just make the car take longer to get to operating temp. If I run my car with a 180 or no termo it will still maintain approx 185 while doing 55 on a 75 degree day. In dead stop traffic it may creep closer to 200 but this will be the same with or without, trust me I have tried every trick in the book or should I say myth. They key to good cooling is a great cooling system.
That's because you're in blazing-hot Arizona and have a run-down cooling system.
Here in Maine, an engine with a good cooling system will not get nearly that hot without a thermostat (or with one that is stuck open).
The thermostat does two things:
It maintains the engine at a temperature that will provide the most efficient combustion and the least wear, according to the design of the engine, and
It lets the engine get hot enough to throw heat into the passenger compartment in the winter.
If your cooling system is up to par (ie: will keep your engine at its specified temperature in Death Valley on a long uphill pull), then having an open thermostat should keep it well below operating temperature under any ordinary operating conditions. If it does not, then your cooling system needs work.
- Eric
Here in Maine, an engine with a good cooling system will not get nearly that hot without a thermostat (or with one that is stuck open).
The thermostat does two things:
It maintains the engine at a temperature that will provide the most efficient combustion and the least wear, according to the design of the engine, and
It lets the engine get hot enough to throw heat into the passenger compartment in the winter.
If your cooling system is up to par (ie: will keep your engine at its specified temperature in Death Valley on a long uphill pull), then having an open thermostat should keep it well below operating temperature under any ordinary operating conditions. If it does not, then your cooling system needs work.
- Eric
#15
I can't argue the wear point too much, but efficiency is generally reduced on a cold engine, and emissions increased. This may be less relevant here, since we are talking about older carbureted vehicles, without a PCM + sensors relying on engine temp to be able to enter closed-loop operation. But, any cold engine will still have excess condensation in the crankcase and that can result in sludge formation. I believe quick warm up is beneficial.
Last edited by AZ455; August 24th, 2012 at 11:18 PM.
#16
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