Question about 1996 Acura TL Series

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Car starts to overheat at idle - returns to normal temp when driving ,elec cooling fan works. could it be something as simple as rad. cap?loosing cooling fluid, but no apparent leaks.

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If it overheats unless you are moving, there is an airflow deficit.

If the switch to run the fan does not turn it on until the engine is too hot, then you probably need a new fan switch.

I might think that the fan only covers a portion of the radiator, and there is only sufficient cooling surface area when the whole radiator is involved, but the fact that moving the car generates so much more heat than idling does would seem to counter that idea.

If you were losing (not loosing) coolant, there would be problems while driving as well.

It is also possible that your radiator's coolant flow is barely adequate, due to clogging. It might be a good idea to have that professionally checked.

Posted on Aug 05, 2010

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2 Answers

Fans not turning on and replaced the coolant temp sensor? Coolant in reserve but not in radiator?


why do you have ? on facts? odd that.
my guess replaced ECT ! not ?
my guess, doing so , now engine is full of air, and not fails.
as all do.
front RAD cooling FANS, right? (not heater blower )
it don't work like you think, ? huh?
what does" not in Rad "mean? with ? marks?

means you trust the silly side tank and not look in rad? fail you will.
when doing cooling service, learn read a book first.
read how to fill and burp your engine, Just like feeding a baby it is.
is engine overheating?
did it , has it, or ? , what started this saga, tell a full story?
and WIN !
Facts: on this system.
the fans are controlled by the computer brain, under a complex set rules now. it's not some mindless switch like days of old.
sorry!
ill now answer for USA 03, how ours work,
ONLY!
ours has one fan., (not fans)
ours has a 3 speed fan (at rad back side.)
and has rules to run all 3 speeds, via 3 relays
the PCM/ECU decides this, based on if A/C is on or off.
and a complex set of rules (uses the ECT for this magic)
Fact 2: ECT will not work with air pockets !!!!
The PCM even turns on and turn off are not same temp!!!
Rules:
1: Rad must be filled of AF/ 50% antifreeze cold, to the top neck of RAD filler.
2: rad and engine burped of all air pockets, ask it's same on all cars.
3: the ECT must work, right, if air pockets there, it CANT work.
4: park car, idle until the minimum engine time is reached parked.
about 180F, but all cars overheat if parked, idling and fan stays dead.
fan is off , and at some point, the fan goes to low speed.

this varies by engine option, but is around 225F. (stage1)
THE FSM covers these checks, and rules, and temps. for all 3 stages of fan speed.
scan the pcm yet>?
got P0128 DTC? or others, for temperatures wrong,
not scanning is a big mistake on all modern cars.
big time!
yes, rad must be full parked cold, yes, yes, yes...
side expansion tanks do fail. for many reasons. ask.

a 2.0L engine. only, here. 7.4quarts cooling cap.
here is ours. usa fan. a 4 wire fan it is....
the ecu controls it using SOFTWARE, (firm-ware in truth)
26098393-rlcj0qgtvzvpudyok3p1nj5o-4-0.jpg do not drive car until all air is burped out of engine and rad.
DO NOT!
in fact run it idling to hot. 180f. ( too hot to touch long)
, kill engine with key.
let cool, to luke warm, or cold.
check rad level. (sure its low)
top it off, cap it,
repeat 3 times, before driving or if it holds levels.

Feb 17, 2016 | 2003 Suzuki Aerio

1 Answer

Is it normal for coolant bottle to boil?


No it is not. Is your engine running hot according to temperature gauge? That is the coolant return which means the coolant was too hot coming out of engine and returning to rad for cooling. You obviously have a cooling system problem whether water pump, thermostat, rad, cooling fan etc. Give more details on what happens when starting from cool, and sittting idling, driving etc as far as temperature gauge reads and how hot engine gets. Be careful not to overheat engine, if you haven't already

Nov 21, 2013 | 1999 Dodge Durango

2 Answers

The car is over heating while sitting still and is fine while in motion the fluids and belts are all good but I recently took it to an auto shop and they suggested that I replace the thermastate and the...


i would check and make sure the cooling fan is operating,if not it will overheat sitting still.a thermostat will cause overheating whether or not it sits still or driving(more so when driving).the same if it has a bad water pump although it may circulate just enough coolant when driving to not overheat with air flow also adding a cooling effect.if you don`t have a leak then i would say the water pump is okay as they usually will leak before causing a overheat problem.make sure the cooling fan is working and the rad does not have anything stopping the air flow over the rad and is not stopping coolant flow in the rad.

Mar 19, 2011 | 2005 Chevrolet Equinox

1 Answer

When the car is just running the temp. gage reads normal after it warms up..where it should be ..the heater will then put out hot air as it should...but as soon as I take off ..the indicator needle drops...


First thing to check would be your coolant level in return bottle and radiator when engine is cool. Remove rad cap, and start engine and turn heater on, and see if level in rad goes down, or is low and if yes, top it up while engine running. Allow engine to get up to normal operating temperature and top up as needed while watching it. Allow rad fan to come on and off a couple of times then put rad cap back on, then top up return bottle to proper level. If level is up and you don't need to add any, then I'd start by changing thermostat. Be sure when re-filling system after changing thermostat, to start car and turn heater on while re-filling, and allow plenty of time with cap off to bleed any air out of system. I normally allow fan to come on and off 2 or 3 times to be sure. Then put rad cap back on and top up return bottle to proper level. Something else to keep in mind is that if the coolant level was fairly low when you first check it, is why was it low? Keep an eye for any coolant dripping down on driveway, or engine, and be sure to check return bottle level often for next few days in case of leak in system.

Jan 29, 2011 | 2000 Plymouth Neon

3 Answers

I have 2003 grand cherokee with 140000 miles that overheats at idle. as soon as i start moving again, the temp goes back to normal.


You have two fan's on your truck, 1 is a fan clutch runs with the drive belt, 2 elec fan motor, with test light and engine running at normal temp, just a little bit above 1/2 way on your temp gauge check voltage at elec. cooling fan harness if you have voltage at one of the two wire's and fan don't turn on, bad cooling fan motor, on the fan clutch after you check voltage at elec. fan motor turn engine off, with your hand spin drive belt fan if it spin's freely bad fan clutch, replace it.Also check cooling level.Hope this was very helpful

Jan 21, 2010 | 2006 Jeep Commander

1 Answer

Overheating toyota landcruise1999


I'd certainly check that the fan is working. If it overheats while traveling at a reasonable speed, it could be that the radiator needs cleaning out. The aircon will always increase engine temp but, while parked or driving slowly,the fan should counteract the coolant temperature rise.

Aug 03, 2009 | 2003 Toyota Corolla

2 Answers

1996 saturn sl2 fan coming on late an over heating


Start with engine cool, & remove radiator cap. Check level in rad & fill to an inch or so from top of rad. Start car & turn heater on.(not defrost)
Now let it run until engine gets up to normal operating temperature & let it run until rad fan comes on & off, 2 or 3 times. Rev engine slightly every so often just to help disperse air in system faster. Fill rad as needed during this time. After you do that, and fan has come on & off 2 or 3 times, put rad cap back on & fill return bottle to proper mark, then see how it is.
I suspect it's just air in system & this should cure that . If not get back to me.

Jun 27, 2009 | Saturn SL2 Cars & Trucks

2 Answers

Overheating


Ok, here is what I have found with the overheating problem with my 2002 PT Cruiser. I have got all the symptoms that everyone else has gotten form, it heats then cools down, gets hot when it idles, gets hot when AC is turned on. The bottom line here is that it gets hot when it is not going down the road or it may raise a little then go back to normal. This is what I have found after a new water pump, radiator, thermostat, cooling fan. What is happening is that the engine or radiator are starting to collect what I like to call calcium particles. so when the particles break loose they circulate around in the cooling system, when the radiator cap opens to let water out to the recory bottle these particles go out with it, however when the cap closes and tries to seal the radiator back up the particles get stuck under the seal therefor the radiator never pressurizes and continues to let water out filling up the recovery bottlle and then boiling over. I have proved this theory several times (and you can too) by letting the car cool down after a overheating tantrum and removing the radiator cap. Look at the rubber seal and i will bet you find these calcium particles built up on it not letting the cap reseal. I have cleaned the cap and put it back on and driven sometimes 2-3 days without a problem. The reason the temp will go up and down at times is because it deoends on whether or no the coolant has washed all the particles away when it opens and closes. Do a heavy duty and thorough cleaning of the cooling system making sure to get these particles out and you should be fine.

Feb 27, 2009 | 2003 Chrysler PT Cruiser

2 Answers

99 couger 2.5L 6 Cyl-temp gauge maxing out, overheating


I will normally remove rad cap when cool. Start engine, set heater in car to heat & turn on blower, if you use defrost setting, the rad fan &/or AC fan will come on, and you don't want that. Then while running with cap off, make sure coolant in rad is an inch or 2 from top of rad, and let it run. When engine gets to normal operating temperature on the gauge, you'll start to see more flow in radiator, and rad fan should come on shortly after, to cool the incoming hot liquid in the rad, that tells you the thermostat opened as it should, and the process starts again, engine coolant gets to temp, thermostat opens, hot goes to top of rad for cooling, and cooler liquid goes out the bottom to engine, etc etc. If your heater is not on while doing this, the coolant doesn't get to heater core in most cases, thus creates an airlock, or will cause level in rad to go down when it is turned on, and thus reduces amount of coolant in rad, plus airlocks in the entire system. So, let it run to the point that the rad fan comes on & off on it's own, about 3 times, while you watch the gauge, to make sure it doesn't overheat, if it does, shut it off and let it cool down & try again. if all appears good, top rad up if needed to an inch or so from top, put your cap on properly, add coolant to proper level in return bottle & try it and see what happens. Remember though, I am assuming thermostat was put in correctly, rad in good shape, fan is working properly as well as water pump doing it's job. If this method doesn't work, get back to me with results.

Feb 16, 2009 | 1999 Mercury Cougar

1 Answer

2001 pontiac montana heater is now blowing cold


You need to check coolant level in rad, when cooled down, and top up your return bottle to marked level.
Start by having coolant (antifreeze) ready, remove your rad cap, and top up the rad level, then start the vehicle, and turn on your heater (not defrost) . Let it run with cap off for a while, and keep an eye on level of the rad & top up as necessary, but leave an inch or so from top.Let it run & observe your guage while doing so, and when gauge gets to normal operating temperature, your rad fan should come on, run for a while then shut off for a while, then back on again after little while, and off again. Let it do this about 3 times, top off the rad as described above, put cap back on tight, and top up your coolant return bottle to mark on side. If your rad fan doesn't come on around normal operating temperature, and gauge heads too much towards hot reading, shut vehicle off, that's an indication that your rad fan fuse has blown, or relay, or fan itself is defective. If all works well & you now have heat, great, but keep an eye on your coolant return bottle level for next while to see if it keeps going down, and add as needed if it is. If the level in bottle continues to go down, you've got a leak in the system somewhere & need to address it a.s.a. p. to hopefully avoid bigger problems, but we'll get to that only if we need to. Do what's up above and let us know the results.

Jan 11, 2009 | 2001 Pontiac Montana

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