Overheating = auto shutoff? Damage?
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Overheating = auto shutoff? Damage?
Hi all. Started my 2003 350 today, to let it run for an hour, as I usually do once a month during the winter while in storage. I left it for an hour. When I went back, it had shut off. I restarted it, and the temp light immediately went to hot, and the car ran very rough. Shut it off, looked under, and there's a nice puddle of antifreeze underneath.
Question: What's the likely damage, if any? Why is it running rough? Does the engine auto shutoff if the temp gets too high?
Thanks for any and all help!
Newfie
Question: What's the likely damage, if any? Why is it running rough? Does the engine auto shutoff if the temp gets too high?
Thanks for any and all help!
Newfie
#3
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im not an expert, but cars do need antifreeze to keep cool... thats why we have radiators.... when first turning the car on it could idle for a certain amount of time with no antifreeze depending on what temperature it is outside, but since you're not driving, the engine is not being cooled by wind and in your case antifreeze either... you're not putting major stress on the engine at idle, but that doesnt change the fact that its still operating at temperatures its not designed for.... i would be a little worried if this happened to my car and especially if it was running rough after the incident.... could have fudged up one of the cylinders and your piston rings and also your head gasket...... can you describe what you mean by running rough??
Last edited by Dblock55; 12-27-2010 at 12:39 PM.
#4
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I'd say the antifreeze/coolant is absolutely necessary, since there's no way to transfer heat from the engine to the radiator without it. The engine is able to radiate a certain amount of heat, but it's going to have some serious hot spots without coolant circulating through the heads and block.
Your engine should not have overheated from idling that long.
Your engine should not have overheated from idling that long.
#6
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Hi all. Started my 2003 350 today, to let it run for an hour, as I usually do once a month during the winter while in storage. I left it for an hour. When I went back, it had shut off. I restarted it, and the temp light immediately went to hot, and the car ran very rough. Shut it off, looked under, and there's a nice puddle of antifreeze underneath.
Question: What's the likely damage, if any? Why is it running rough? Does the engine auto shutoff if the temp gets too high?
Thanks for any and all help!
Newfie
Question: What's the likely damage, if any? Why is it running rough? Does the engine auto shutoff if the temp gets too high?
Thanks for any and all help!
Newfie
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#8
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im not an expert, but cars do need antifreeze to keep cool... thats why we have radiators.... when first turning the car on it could idle for a certain amount of time with no antifreeze depending on what temperature it is outside, but since you're not driving, the engine is not being cooled by wind and in your case antifreeze either... you're not putting major stress on the engine at idle, but that doesnt change the fact that its still operating at temperatures its not designed for.... i would be a little worried if this happened to my car and especially if it was running rough after the incident.... could have fudged up one of the cylinders and your piston rings and also your head gasket...... can you describe what you mean by running rough??
Does the 350 retard its timing when too hot? I have a snowmobile that does that; if there is insufficient snow to cool the antifreeze circulating up in under the track, the motor automatically retards timing until it cools. Anyone know if the 350 does that?
#10
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Since the winter around here is 5 months, I start it up once a month or so and let it run to recharge the battery etc. By running rough I mean it feels as if it is running on a cylinder or two less than it should.
Does the 350 retard its timing when too hot? I have a snowmobile that does that; if there is insufficient snow to cool the antifreeze circulating up in under the track, the motor automatically retards timing until it cools. Anyone know if the 350 does that?
Does the 350 retard its timing when too hot? I have a snowmobile that does that; if there is insufficient snow to cool the antifreeze circulating up in under the track, the motor automatically retards timing until it cools. Anyone know if the 350 does that?
as for idling your car for an hour.. who told you to do that??? Thats a terrible idea... engines are far from perfect machines and at low rpms the piston rings do let through air and fuel as stated previously... as well as poor cooling... more spark plug wear occurs... the list goes on.... idling is no good for your car...
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when our racecar overheated the heads were warped so bad you could see the waves in them.. but yours may be slight enough to get machined out but i would defnetly not cout on it id start looking for a new long block assembly.
#12
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Since the winter around here is 5 months, I start it up once a month or so and let it run to recharge the battery etc. By running rough I mean it feels as if it is running on a cylinder or two less than it should.
Does the 350 retard its timing when too hot? I have a snowmobile that does that; if there is insufficient snow to cool the antifreeze circulating up in under the track, the motor automatically retards timing until it cools. Anyone know if the 350 does that?
Does the 350 retard its timing when too hot? I have a snowmobile that does that; if there is insufficient snow to cool the antifreeze circulating up in under the track, the motor automatically retards timing until it cools. Anyone know if the 350 does that?
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Refilled antifreeze this morning; started right up and ran smoothly. The ECU does retard timing and/or reduce fuel when too hot. Let it run until all the way to the H; fan didn't cut in. A new fan or switch is needed. Didn't appear to be any damage, though only a road trip will tell. That's 4 months away...
Thanks for the help!
Thanks for the help!
#17
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https://my350z.com/forum/maintenance...fan-motor.html
OP is SOL since the letter indicates it's for '04-'07 cars. His probably died a natural death.
Last edited by DavesZ#3; 12-29-2010 at 03:18 AM.
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auto, car, damage, engine, g35, infiniti, oil, overheat, overheated, overheathing, overheating, piston, rings, shut, snowmobile