Weird Overheating Camry Question
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Elder User
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From: Woodland Hills
Weird Overheating Camry Question
My pops has a 92 camry that has been overheating while stopped (electric fan) but he says revving his engine while stopped cools down the car. Why would that be?
I'm trying to see if I can fix this up myself and save him a few bucks.
Thanks,
Alex
I'm trying to see if I can fix this up myself and save him a few bucks.
Thanks,
Alex
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Elder User
Joined: Dec 2004
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From: Woodland Hills
Yeah, my dad said he's been adding coolant since it's been boiling over now and again. I haven't actually checked the coolant percentages (if that' what you mean) since I don't have the tool (chemicals?). But there is plenty of juice in there.
Thanks for the tip on the water pump cycle. That's probably it. Now I've just got to see what I can do about the fan (relay...sensor...motor?).
Hotshot
Joined: Oct 2002
Posts: 18,488
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From: The Big, Oregon
Is he saying that revving it actually cools it down, or that you should rev it to cool it down? That used to work on old rear-drive cars and trucks since the fan is engine driven, but not on crossways-mounted front drives (except the old Minis) since they have an electric fan.
Chances are it's still overheating pretty bad with the engine revving, and he's just expecting it to cool down a bit that way.
The fan is probably the switch, which should be screwed into the radiator tank.
Chances are it's still overheating pretty bad with the engine revving, and he's just expecting it to cool down a bit that way.
The fan is probably the switch, which should be screwed into the radiator tank.
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Elder User
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From: Woodland Hills
Is he saying that revving it actually cools it down, or that you should rev it to cool it down? That used to work on old rear-drive cars and trucks since the fan is engine driven, but not on crossways-mounted front drives (except the old Minis) since they have an electric fan.
Chances are it's still overheating pretty bad with the engine revving, and he's just expecting it to cool down a bit that way.
The fan is probably the switch, which should be screwed into the radiator tank.
Chances are it's still overheating pretty bad with the engine revving, and he's just expecting it to cool down a bit that way.
The fan is probably the switch, which should be screwed into the radiator tank.
Thanks, I'll look into the switch.
Postmaster
Joined: Nov 2004
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From: Marion, VA
There were some cars that had a problem with water pump impellers. They would break off by small pieces and there would not be enough left to properly circulate the coolant. Speeding up the engine will speed up the flow to the radiator. Almost the same problem as a loose belt to the water pump.
Senior User
Joined: Jan 2006
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From: eastern nc
Sometimes turning on the AC will help cool it if the fan thermostat switch is bad, it turns on the cooling fan and in some cases an additional fan.(when they are equipped with one)
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Is he saying that revving it actually cools it down, or that you should rev it to cool it down? That used to work on old rear-drive cars and trucks since the fan is engine driven, but not on crossways-mounted front drives (except the old Minis) since they have an electric fan.
Chances are it's still overheating pretty bad with the engine revving, and he's just expecting it to cool down a bit that way.
The fan is probably the switch, which should be screwed into the radiator tank.
Chances are it's still overheating pretty bad with the engine revving, and he's just expecting it to cool down a bit that way.
The fan is probably the switch, which should be screwed into the radiator tank.
Postmaster
Joined: Apr 2001
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Low coolant level allows air into the system. The air pockets around the temp sensor. When the sensor is no longer exposed to coolant, the temp gauge rises quickly. When your pop guns the engine, it sends a surge of coolant that temporarily purges the air pocket. Coolant contacting the temp sensor makes the gauge fall, making it appear that the system is cooling again.
Freshman User
Joined: Sep 2008
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I am a new member as I bought a 2000 Explorer Sport this week. Love the truck, but am confused about one thing. The overdrive is on when I start the truck, is this the best for fuel economy or do I want to turn it off for everyday driving. The manuel is vague in its discription. When the dash says O/D Off, should I have this on or turn it on.
Any Help, thanks.
Any Help, thanks.
Elder User
Joined: Jan 2007
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Overdrive will help fuel economy since it's going to allow the engine to run highway speeds at lower rpm's. The only time you'd really need to turn it off is when you're towing a trailer or a boat or something along those lines.
Thread Starter
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Elder User
Joined: Dec 2004
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From: Woodland Hills
I am a new member as I bought a 2000 Explorer Sport this week. Love the truck, but am confused about one thing. The overdrive is on when I start the truck, is this the best for fuel economy or do I want to turn it off for everyday driving. The manuel is vague in its discription. When the dash says O/D Off, should I have this on or turn it on.
Any Help, thanks.
Any Help, thanks.
)
Thread Starter
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Elder User
Joined: Dec 2004
Posts: 724
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From: Woodland Hills
Low coolant level allows air into the system. The air pockets around the temp sensor. When the sensor is no longer exposed to coolant, the temp gauge rises quickly. When your pop guns the engine, it sends a surge of coolant that temporarily purges the air pocket. Coolant contacting the temp sensor makes the gauge fall, making it appear that the system is cooling again.
The temp ended up getting quite erratic and my pops ended up taking it to a mechanic who replaced the thermostat for $150. It seems to be doing better now, though not great, and it seems to be real thirsty. After letting her sit for a while I keep needing to put in more coolant and there doesn't seem to be a leak.
But now she's idling rough as well...so I think it may be about time for a new junker.
