how hot is too hot of an operating temp?
#894155
01/02/11 02:15 AM
01/02/11 02:15 AM
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Joined: Jan 2005
Posts: 3,344 Central TX
roe
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360 auto, car in my sig, would a steady 195-200 be too high? and will a car overheat without an overflow tank?
1971 Plymouth Satellite 408/904 8 3/4 3.23 SG
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Re: how hot is too hot of an operating temp?
[Re: roe]
#894157
01/02/11 02:33 AM
01/02/11 02:33 AM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
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Lincoln Nebraska
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You're OK on the temp. The overflow jug in conjunction w a coolant recovery cap stops the majority of coolant loss (some still evaps as steam out out the jug as it has to be open for it to fill) and after it cycles a few times and gets most of the air out of the system w the coolant right up to the rad cap seal that can let it run a slight bit cooler and lessens rust formation as it needs air to form. To ans your Q if you are overheating (or not) it will be independant of whether you have an overflow system or not. Is that the temp around town or out on the hiway?
live every 24 hour block of time like it's your last day on earth
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Re: how hot is too hot of an operating temp?
[Re: DaytonaTurbo]
#894158
01/02/11 02:36 AM
01/02/11 02:36 AM
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Joined: Jan 2005
Posts: 3,344 Central TX
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how hot is too hot? what temp do inot want to see?
1971 Plymouth Satellite 408/904 8 3/4 3.23 SG
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Re: how hot is too hot of an operating temp?
[Re: roe]
#894163
01/02/11 04:03 AM
01/02/11 04:03 AM
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Joined: Mar 2010
Posts: 357 Lake Elmo, MN
Evil Monkey
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It sounds like you have a 195 degree thermostat installed, which is what Ma Mopar recommends our engines have (and what a parts store will give you as a stock replacement thermostat), and running at 195 to 200 degrees would be normal for a 195 degree thermostat, as long as the temp is basically staying steady at 195 to 200.
The things you want to watch out for are:
A stady increase in temp when running down the highway. This would indicate that your cooling system is undersized or plugged up - you're not getting enough coolant flow.
Or
A steady increase in temp when idleing or crusing slowly. This would indicate that there's not enough air blowing through the radiator.
1974 'Cuda 360/TKO
1990 Ram Van
1998 Neon
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Re: how hot is too hot of an operating temp?
[Re: hooziewhatsit]
#894164
01/02/11 04:06 AM
01/02/11 04:06 AM
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Joined: Jul 2008
Posts: 30,632 Florida STAYcation
IcorkSOAK
Financed his waterbed
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Financed his waterbed
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Florida STAYcation
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Quote:
Or are you thinking of a sensor that shows how open the thermostat is?
Yes .. MORE in this area ....but the Benz idea is good to. That RV project I am working on now ....in the heads and water-pump ... there are all sorts of places to put sensors EVERYwhere.
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Re: how hot is too hot of an operating temp?
[Re: ademon]
#894166
01/02/11 11:43 AM
01/02/11 11:43 AM
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Joined: Jan 2005
Posts: 3,344 Central TX
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thanks for the info guys. I get a steady 200 on the highway, but idling in stop and go traffic it hits 230, then drops when I start moving again. I'll attribute a lot of that to not having a fan shroud at all. The 318 stayed cool without it but tue 360 seems to need it. Gotta find one.
1971 Plymouth Satellite 408/904 8 3/4 3.23 SG
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Re: how hot is too hot of an operating temp?
[Re: ademon]
#894167
01/02/11 11:47 AM
01/02/11 11:47 AM
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Joined: Jan 2005
Posts: 3,344 Central TX
roe
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also need to either get a new cap for my overflow tank, or pick up a universal one. One of the nipples broke off my original so coolant can go in but can't come back out to the radiator.
1971 Plymouth Satellite 408/904 8 3/4 3.23 SG
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Re: how hot is too hot of an operating temp?
[Re: ireland383]
#894170
01/02/11 12:21 PM
01/02/11 12:21 PM
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Joined: Jan 2004
Posts: 3,001 Coram, NY
Pool Fixer
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I know I don't know as much as many members here, but I just don't like 200 for our cars. I know that new cars run that hot but they are designed to run safely on the edge. EFI, knock sensors, computer spark control to retard timing, etc..
Personally, I don't want mine going over 180 if I can help it. I took my big block charger on a road trip this summer, sat in 3 hours of stop and go traffic to get a total of about 20 miles. It got to 210 in stop and go. No, it didn't puke and overheat, but I still didn't like it. I'm trying to come with some solution to get it to run cooler at idle. as soon as the car moves, even 20-30 mph, the temp drops right to 170 where my temp sensor is set (electric fans running off sensor)
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Re: how hot is too hot of an operating temp?
[Re: Pool Fixer]
#894171
01/02/11 12:44 PM
01/02/11 12:44 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
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Posts: 36,041
Lincoln Nebraska
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Quote:
I'm trying to come with some solution to get it to run cooler at idle. as soon as the car moves, even 20-30 mph, the temp drops
the tried/true setup of a MP thermal clutch fan spaced ~2/3 into a shroud does work good and check the dia of your WP pulley and might be able to source a smaller dia one to speed up the fan/pump and pull the pump to tack on an anti cav plate on the vanes to make it more efficient. EDIT (re)read & missed that you're running electric fan(s)
Last edited by RapidRobert; 01/02/11 01:05 PM.
live every 24 hour block of time like it's your last day on earth
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Re: how hot is too hot of an operating temp?
[Re: 1_WILD_RT]
#894173
01/02/11 01:23 PM
01/02/11 01:23 PM
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Joined: Mar 2005
Posts: 2,060 Pendleton NY
terzmo
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top fuel
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Quote:
FWIW Ford doesn't even turn on the electric fan on cars so equipped till 221 degrees..
FWIT...that ford must be a newer car...old iron was in the danger zone at 210 plus...I don't understand why anyone would run old iron motors at 230 and wait for 250......195 to 200 nis ok...I prefer to see it around 190 for My Bee and GTX...both 440 motors
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Re: how hot is too hot of an operating temp?
[Re: roe]
#894174
01/02/11 01:27 PM
01/02/11 01:27 PM
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Joined: Jan 2006
Posts: 587 IL . usa
cjs69mope
mopar
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I run a seven blade flex fan 17 in dia with stock shroud on a 26 inch 3 core stock brass type radiator . with a 160 t-stat the eng would run to cool for school , never even got to 180 unless very warm out side . the eng has aprox 600 hp. had to switch to 195 t stat to correct some air fuel distributon issiues and car still runs 195 on hyway will creep to 210 if sitting in trafic to long but still ok . I have a friend with a all alumnum 850hp hemi that runs stock seven blade fan with the viscus thermo clutch and keeps cool and says that he has tried every fan out there and none can beat the factory seven blade pulls about 4000 cfm so he says . try to find electric fans that will fit on a 26 in radiator and pull like that ! very dificult !
1969 Dodge Charger
1969 Dodge Superbee
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