Question about 2001 Saturn L-Series

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Overheating new heater core, radiator, thermostat, fan module

I've changed the radiator heater core thermostat and fan module, car still runs hot, Ichanged

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  • 49 Answers

This problem is caused by the coolant temperature sensor and this will cause you to think the car overheated but the gauge isn't working properly as supposed to

Posted on Mar 23, 2014

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6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

  • 79 Answers

SOURCE: Heater not working

I would check if your vent to the outside is open. If it is I would check the vacum hose that controls the vent to open and close.

Posted on Jan 27, 2009

  • 4 Answers

SOURCE: overheating 94 saturn sc

Check the upper radiator house. When the engine is cool this hose is cool and soft to a squeeze pressure. If you check the same hose while the engine is hot "use caution as this hose might be very hot" this hose shoud be hot and stiff to the touch (louded under pressure). Lack of either is normally a sign of a bad thermostat or a failing water pump. Also check that the water reservoir cap is not leaking, is only a $5 fix.

Posted on Dec 24, 2009

johnjohn2
  • 5763 Answers

SOURCE: Saturn is overheating, tried several things.. nothing is working.

how about the coolant temp sensor, they had alot of problems with that sensor and also the plug for it,some have two of these sensors side by side, one for the gauge and the other for the fan, i would replace these first and go from ther good luck,

Posted on Apr 10, 2010

  • 394 Answers

SOURCE: 1998 Saturn SL1 - I

Hi,
As both hoses from the heater core are hot, there is no need to replace the heater core.
The problem will be in the heater control under the dash. I have no experience with Saturn, but I am responding to your problem so as not to remove the heater core.. That would be wasted time and money. The heater, A/C mixture control is the problem.
Someone else will need to guide you through the rest of the way.
Sorry i could not lead you all the way through.
Wayne

Posted on Nov 17, 2010

  • 1915 Answers

SOURCE: Have a 1999 sl2..... Problem with the Saturn SL

you either have a closed thermostat or a blockage in the radiator

Posted on Dec 24, 2010

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1 Answer

Saturn overheating


Your problem is the coolant temperature sencer is bad this will cause the car to overheat or false read it's over heated change that and and you should be ok from there remember saturns have two Sencers so finding the right one could be a problem

Mar 23, 2014 | 2001 Saturn L-Series

1 Answer

99 ford contour gauge shows running hot. Change both sensors near thermostat and the thermostat. Flushed system and burped it. Ac or heat makes no difference. Fans seems to be working. Any ideas?


Is it ACTUALLY overheating? Check for heat at the top and bottom radiator hoses, and at both heater core hoses. If one is cold then your radiator or your heater core may be plugged and in need of a individual flush.

Oct 29, 2013 | 1997 Ford Contour

1 Answer

Can a bad heater core cause your vehicle to overheat? I have a 1994 GMC Suburban


I WOULD SAY NO BECAUSE WATER ONLY CIRCULATES WHEN YOU TURN ON THE HEATER, BUT IF YOUR VEHICHLE CONTINUES TO OVERHEAT IT COULD BE 5 THINGS. CLOGGED RADIATOR,RADIATER HOSES.THERMOSTAT,RADIATER FAN SENSOR OR THE WATER PUMP

Feb 14, 2013 | 1994 GMC Suburban

1 Answer

My 98 ford f150 overheats constantly. I have changed the thermostat, fan, fan clutch, gave it a flush and still overheating. A mechanic checked it and said the water pump is good cause water is...


does the heater work good, like real HOT when the truck is HOT? if not, flush the heater core with a water hose, both directions. Now when the truck is HOT open the hood and feel the air coming thorough the radiator, it should be HOT. if its not, the radiator may be plugged. If the mechanic has a Temp Gun, have him check the radiator temp, it should be uniformly HOT if you find cold spots (like if the radiator is 200f and there are places that are 150f) the radiator is plugged and "flushing" will do nothing.

Aug 30, 2011 | Ford F-150 Cars & Trucks

2 Answers

My truck is running cold on the freeway but when I slow down and stop it starts to heat up a little. I changed the thermostat and am going to change the heater core could it be something else


yes could be problem with the radiator fan(s) not running at any road speed. Check the fan(s) for noise-free turning by hand. Check fan fuse and relay (swap with similar relay). Turn on the air conditioner which should immediately turn on the fan(s). Overheating while driving could very well be the thermostat--you will need to drain the cooling system before replacing the unit. Blow out the radiator core with compressed air from the engine side to remove bugs and other debris first. Hope this helps!

Jan 22, 2011 | 1991 Ford Ranger Supercab

3 Answers

Took out the thermostat, replaced the radiator, the water is circulating in the radiator but it is still running hot. what do i do next?


Overheating can seriously damage a car's engine if left unchecked. Although overheating simply means that a car's engine temperature exceeds normal operating temperatures, the causes of overheating are varied. What follows is a brief list of some of the most common causes of engine overheating.

    Faulty Radiator
  1. A car that overheats will often have a faulty radiator. A radiator is responsible for cooling hot engine coolant that picks up heat from inside a car's running engine. A radiator "radiates" the heat from engine coolant out into the outside air. A faulty radiator loses its "radiating" effects and allows engine coolant to become overheated, thus rendering it ineffective at adequately cooling and engine.
  2. Faulty Water Pump
  3. A faulty or malfunctioning water pump prevents adequate engine coolant flow and can cause a car to overheat. A water pump serves to pressurize and propel engine coolant throughout a car's engine and radiator to increase the heat-reducing capabilities of engine coolant. A faulty water pump loses its ability to adequately pump and propel engine coolant, and can cause a car to overheat.
  4. Coolant System Leaks
  5. A leaky engine coolant system reduces the level of circulating engine coolant, which increases engine temperature and leads to engine overheating. Radiators, water pumps, and coolant system hoses and seals--all of these coolant system parts can develop leaks, which can result in low coolant levels and engine overheating.
  6. Faulty Thermostat
  7. A car thermostat regulates the flow of engine coolant. A thermostat is a heat-sensitive valve that opens when a car engine reaches a set operating temperature and closes when a car engine is cold and warming up. If a thermostat gets stuck in the closed position, coolant will be prevented from reaching the engine, which will quickly lead to engine overheating and potential engine damage.
  8. Low Engine Oil Level
  9. Engine oil, in addition to lubricating an engine's internal parts, helps to keep engine operating temperatures reduced by eliminating friction within the engine. If engine oil levels are low, friction and heat build up inside an engine, a condition that causes increased engine operating temperatures and can lead to engine overheating.

Jan 15, 2011 | 1998 Isuzu Rodeo

1 Answer

I had the water pump replaced. Is there a relay or a valve that controls the heater, or would a thermostat control it???


i didn't see you last posting about your water pump but theres is a tiny radiator called a heater core. it has the same hot water running through it as your big radiator and engine have.so when you turn your thermostat to hot and kick on the fan the fan blows through the heater core and wallaa you have heat you probably need a thermostat.if you have no heat and it is overheating hear and there that's probably what you need.make sure you see if you filled the radiator up all the way when you changed the water pump.

Nov 18, 2010 | 1998 Cadillac DeVille

3 Answers

Overheating radiator without leakage


I posted this in a different web sight I hope it helps.


Re: Overheating and blowing cold air
I have been a mechanic for 20 years. Your problem is the heater core is plugged. The cold water from the radiator blows directly at the thermostat keeping it closed even when you are overheating! BAD DESIGN!! If you look at the water flow charts in AllData you will understand. If you rev the motor to 3,000 rpm's the turbulent HOT water at the water pump impeller (near the thermostat) will reach the thermostat to open it and the car's temp will fall very fast to the correct temperature. If you remove the thermostat it will not overheat but will run way to cold. If you bypass (loop) the heater core it will not over heat.

The hot water that leaves the heater core returns to the engine at the thermostat. It is the only hot water introduced to the thermostat to keep it open and allow the water to flow from and to the radiator. I normally just back wash the heater core and get large chunks of rust flake out then its fixed. Back wash then froward wash repeatedly many times. Also flush out the motor so you don't re plug the heater core. I hope you have now blown the head gaskets or cracked a head yet. Make sure to run the proper coolant in the car so you don't promote more rust flakes. And bleed the air out as mentioned in detail by other posters.

Nobody knows this little secret. Not even Subaru mechanics at the dealer, no TSB (Technical Service Bulletins a special note after the fact to mechanics). After days and days of trouble shooting a 1993 Subaru Impreza (2.0?) I looked at the water flow chart and then it was clear what was happening. This phantom overheating problem stumps the best mechanics and sends many Subarus to the crusher.

http://www.subaruoutback.org/forums/...threadid=17264

Jan 16, 2010 | 1990 Subaru Legacy

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