what are safe coolent temps (while cruising)
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what are safe coolent temps (while cruising)
i put a 170F thermostat in the car and running an aftermarket coolant temp gauge, it hangs around 180F usually idling, after cruising and getting on the car a little bit it slowly creeps up to 200F but im trying to see where i should worry. I had a buddy that said 210-220 is still nothing to worry about as the motor runs more on the hot side but most cars i've owned they usually were around 180-190F tops but some motors are different than others. Any advice/help would be much appreciated!
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i put a 170F thermostat in the car and running an aftermarket coolant temp gauge, it hangs around 180F usually idling, after cruising and getting on the car a little bit it slowly creeps up to 200F but im trying to see where i should worry. I had a buddy that said 210-220 is still nothing to worry about as the motor runs more on the hot side but most cars i've owned they usually were around 180-190F tops but some motors are different than others. Any advice/help would be much appreciated!
Dude,
180F to 200F is perfectly normal while cruising, assuming you mean on the open highway driving 55 to 75 mph.
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Last edited by freakness; 01-12-16 at 07:46 PM.
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you also get some headroom from boiling from the pressurized cooling system, most stock rad caps are 1.3 bar. i know i have run my coolant over 230F a few times sitting in traffic when my fan failed and nothing bad happened
170 is pretty low, you will lose gas mileage a bit at that point, i would try to keep it over 180, but if it's a race car then 170 is totally fine too to give you more headroom.
170 is pretty low, you will lose gas mileage a bit at that point, i would try to keep it over 180, but if it's a race car then 170 is totally fine too to give you more headroom.
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Nope, not on this car, I'm just comparing to my old DSM days when I had 400+ WHP and they were known for temp issues. I was always told by the tuner to not let it go over 235ish. You can always turn the AC on to kick on the fans if they are not already on but otherwise you should hit the highway at a cruising speed or just turn the car off.
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Dude,
My '95 sc300 uses a 0.9 bar/13 p.s.i. cap (88 kPa to be exact). My '87 MR2 and '87 Toyota truck also run 0.9 bar/13 p.s.i. caps. Other Toyota engines use 1.1 or 1.3 bar caps.
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p.s. i do have a 1.3bar cap
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Nope, not on this car, I'm just comparing to my old DSM days when I had 400+ WHP and they were known for temp issues. I was always told by the tuner to not let it go over 235ish. You can always turn the AC on to kick on the fans if they are not already on but otherwise you should hit the highway at a cruising speed or just turn the car off.
Mine never gets above the ~40% mark on the gauge and probably never will, barring major cooling system failure, with the addition of the big hood vent directly behind the radiator.
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I'm curious to hear what others have to say... I wouldn't think many people are running actual coolant temp gauges unless they've done serious engine upgrades and need to monitor things closely, which doesn't really sound like the gist of this thread. Are people just estimating temperature by the marks on the factory gauge?
Mine never gets above the ~40% mark on the gauge and probably never will, barring major cooling system failure, with the addition of the big hood vent directly behind the radiator.
Mine never gets above the ~40% mark on the gauge and probably never will, barring major cooling system failure, with the addition of the big hood vent directly behind the radiator.
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Those numbers puzzled me at first glance, then I noticed the units... That's 194-230 F, which is a pretty wide range. No wonder the needle never moves! I guess that answers whether 230 is considered dangerously hot, if that's the upper limit of normal operating range.
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Makes more sense now. Gotta keep an eye on all the non-factory stuff being fitted together.
Those numbers puzzled me at first glance, then I noticed the units... That's 194-230 F, which is a pretty wide range. No wonder the needle never moves! I guess that answers whether 230 is considered dangerously hot, if that's the upper limit of normal operating range.
Those numbers puzzled me at first glance, then I noticed the units... That's 194-230 F, which is a pretty wide range. No wonder the needle never moves! I guess that answers whether 230 is considered dangerously hot, if that's the upper limit of normal operating range.