ENGINE OVERHEATING

Could be airlock, clogged radiator,water pump and a blown headgasket, cracked head or block-

It sounds like my rad fan is always running and I just noticed today that as I'm driving the engine temp is okay but stopped at a light etc...the temp shoots up. I had the thermostat replaced last summer.

Try replacing the thermostat again, check the water pump if its pumping coolant thruout the engine-also the radiator if its partially clogged

This is a Diesel engine which when it overheats the
revs shut down to tickover until it cools down

Hi antrum,

Thank you for the donation and sorry for the delay in replying. I do not know why but your question was not at top of our list so it was missed out.

We do not have any info in our database for diesel engines of your vehicle so I do not have anything to fall back on. What I have to offer is only my experience with diesel engines and hope is sufficient to assist in getting the problem resolved.

Before we proceed, I need to understand the situation and here are some questions for you.

1. What have you done so far?
2. When did problem start and was it gradual, from minor and getting worse?
3. Was anything done/happened prior to it happening?
4. Is the coolant in the radiator depleting?
5. Is the reserve ( recovery ) tank constant, depleting or increasing?
6. Is cooling fan mechanical with fluid couplings, electrical or both?
7. When does the overheating occur, at idling, cruising or high speed driving?

Sorry if I am asking too many questions but they are required to understand what is happening. If you have any other information that you think might help, please let me know.

The Sedona I was asking the ? is my Daughters who is on Holiday in the South of France Since I was contacted by her she has had a mechanic out to check the car and discovered that there was an air lock in the cooling system which he fixed nd the car seems to beO/K
John

When there is any air lock in the cooling system, it usually is caused by a leak somewhere or a bad radiator cap. Bleeding the system is only a temporary measure unless faulty parts or leaks are replaced/rectified.

Be sure to monitor the coolant level closely to ensure it is not depleting.

Had overheating issue with van 3 months ago and blew heater hose - had it and thermostat replaced. Just began overheating again - used the old heater trick to dissapate engine heat and it worked. Two days ago, after 30 mile drive, overheated almost to max - liquid overflowing from cooling resivour. Let it cool and tried again - soon overheated again with cool air blowing from heater. Took to shop - they let it idle 30 minutes at a time and couldn't make it overheat, yet cool air still blowing from heater. Note: coolant liquid levels had been running low and would have to be topped off about once a week.

With all of this in mind, does this sound like a water pump issue? Is there any way to check to be sure? The shop mechanics finally got it to overheat on a drive - they're not sure it's the water pump because they seem to think there would be a broken belt associated with it, but truth is, they're not sure why it's overheating.

Cooling fans coming on? No airlock in the system-could be the water pump. If it continues get it block and pressure tested.

One way to test for a bad water pump is to squeeze the upper radiator hose when the engine is hot and idling. Careful, because the hose will be HOT! If you do not feel much coolant circulating through the hose when you rev the engine, the pump may be bad. The other cause might be a bad thermostat that is not opening properly (remove and inspect the thermostat), or a clogged radiator.

My Sedona is suddenly overheating and coolant is coming out of the overflow tank. I really need help as to what this problem may be..

Check if the cooling fans are working.

I was told that they aren't. Today I noticed that a little switch was turned into a different position. I switched it back and could hear the fan running then. I drove it around a little bit. The gauge went over the middle mark. It didn't run hot as fast but I did notice that I was low on coolant. So I just left the van alone until I could get coolant tomorrow.

Seems there is a problem with the cooling system and someone has rigged a switch to turn the cooling fan on. Remember to bleed the system once you top up coolant and check for leaks which could be why you were low on coolant.

Hello there.. I have a Kia sedona 2002 and I encountered the same problem you have.. you will not believe it the cause was a faulty radiator cap..just as simple as this, so I went and bought a genuine Kia cap put there and that's it, all done.
Just try it and I'm sure it will work

Hi. I have a 2002 Kia Sedona with 85000 kms on it and lastnight on the way to work I noticed the temperature gauge had climbed almost all the way to the top. I pulled over, let it cool down then took my time getting to work while carefully watching the gauge. While at work I topped the oil and coolant but unfortunately it still overheated on my way home. Any tips on what I should do next? Could it be the thermostat? Water pump? Please help. Thanks

The first step would be to pressure test the cooling system for any leaks. Also make sure the fans are working properly.

Yes, a pressure cap will make a big difference it does a very important job in the cooling system, with applied pressure the cooling system boiling point is raised, Water boils at 100DegC at sea level, add a 15Ib cap and it will raise the boiling point to around 121Deg C so cooling systems can operate at higher temps with out boiling, but each engine is designed to run at a specific temp so the correct thermostat and cap are very critical to correct cooling and maintaining operating temps.

I just checked and the fans work and there isn't any leaks

No, you have to pressure test the system.

my van is overheating. i replaced the radietor and flush it refilled the coolant and it is overheating. how would you know if its the head gasket or just air in the cooling system? if it is the head gasket how do you go about changing it? is there away to test it?

Did you replace the thermostat? As far as the head gasket, have you checked to see if the coolant is mixing with the engine oil? Have you had to add coolant? Are there any leaks you see on driveway or do you smell coolant while driving? And finally, do you get good heat, how long does it take to overheat, is it the same as it was prior to replacing the radiator?

My van just started to overheat. I checked fluid level and it is full. With heater running on full, it runs cooler when I sitting still than when I am moving. Any ideas?

With the heater on, the heater core acts like a small radiator helping to cool the coolant.

Does the car only overheat when sitting still? If so, is the cooling fan coming on? Also if it overheats at anytime, have you tried replacing the thermostat or flushing the cooling sustem?

Let me know.
Joe

My sedona drives with no problem commuting locally, however the heating takes long to heat up.

But when driven on the motorway for longer journeys, it heats up and stops accelerating for certain intervals, then i have to pull over to allow to cool before driving again?

Please help!!!!!

First. make sure the coolant is full. The fact that it takes long for heat makes me believe the thermostat is sticking. That is where I would start. Replace it and at the same time, flush the cooling system.

Let me know if this helps.

Joe

Engine Cooling problem
2001 Kia Sedona 6 cyl Front Wheel Drive Manual

iv'e found what appears to be oil in my coolant tank but not sure can someone please help

[quote:f502acab79="ethen522"]Engine Cooling problem
2001 Kia Sedona 6 cyl Front Wheel Drive Manual

iv'e found what appears to be oil in my coolant tank but not sure can someone please help[/quote:f502acab79]

If there is oil in your radiator that indicates a big problem. If the oil only appears to be in the overflow tank then was the cap on did you spill some in there or is it road grime?

A crack in the head gasket or less commonly the engine block will allow oil to pass to the cooling system. Check you oil level to see if excessive oil has disappeared. Try and get some of the coolent out of the tank for a better view. It always looks dark in the radiator. There is usually some oily veins that appear darker on close inspection. If your engine is running the oil may produce dark bubbles in your radiator during turbulence.

Good luck. If you think it's still oil, get someone else to look at it.

Conversley - check your oil for radiator fluid on the dip stick. Always a good idea to change the oil to be safe.

Engine Cooling problem
2004 Kia Sedona 6 cyl Two Wheel Drive Automatic

im having a problem getting the alumimum plate off of the front of the motor to get the water pump. it looks like theres a bracket holiding the a/c unit on. does it have to come off also?

does diagram below show the cover you are talking about?

2002 kia sedona temp gauge shoots to max after about 5 min but van does not overheat. hot air blows when van is moving but turns cold when stopped

Have you checked the coolant level? It sounds low.

Check that and let me know what you find.

Joe