Question about 1997 Jeep Grand Cherokee

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Coolant system light

My "Check Coolant System" light comes on all the time.
Anyone know why. Is this serious?

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  • fen2ols Oct 28, 2008

    I have the same problem. My guy Jason at the local Jeep dealer says not to worry about it. Apparently many 97's have this problem and it is an electrical problem and as long as you keep an eye on the coolant level can be ignored. but the beeping sure is annoying!!!

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Keep eye on coolant level, could be sensor is corroded. try flushing your cooling sytem

Posted on Oct 28, 2008

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Sensor in over flow bottle

Posted on Oct 30, 2008

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Loss of coolant through overflow pipe


yes, might be, but you have to find the reason if that is not the issue. change and retest. check that your temp is correct and your fan (s) are functional and that the thermostat is functioning correctly too. As you say but there might be more to it.

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Loss of coolant is serious because if you allow your engine to overheat you can cause very expensive engine damage - thousands of dollars of damage (not hundreds).

The items that need looking at are:

- Radiator cap is old and faulty. This can allow coolant to escape and needs to be replaced every 4 or 5 years (sometimes sooner) with the correct spec cap - not any old product picked up at some auto store.

- External leak - you need to check all flexible coolant hoses and connections for leaks as well as around the water pump to ensure the WP gasket is not leaking

- Internal leak
The most common is a blown cylinder head gasket which can allow coolant to escape and to get into the cylinders and into the lubrication system. If getting into the cylinders you will see white smoke coming from the exhaust . You need to check the engine oil for coolant contamination as a coolant can escape into the lubrication system via a damaged head gasket. You also need to check the coolant for signs of oil escaping under pressure via the blown head gasket into the cooling system.

An internal leak can also be caused by a cracked cylinder head but if you have this condition are blown head gasket will have probably occurred around the same time.
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I have a 2000 Volkswagen new beetle GL 2.0 an I'm


You'll need a cooling system pressure tester to put pressure in the system and it will force the coolant out of the area where it's leaking. Water pumps are common as are heater hoses. Sometimes it's really hard to find the leaks. If you've overheated too many times, you may have warped the cylinder head and that will cause a major leak. Look for white residue around the head/block and should point you in a genreal direction.

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Added coolant and tank is full. Ran it a couple times and added more coolant. 1 1/2 gallons altogether. Coolant light goes out then comes back on in a few seconds. Do these systems need bled. Has a bleed...


Good Evening. Bleeding the air out of the cooling system is a very important step. What you are looking for is just a steady stream of antifreeze you will see the difference from the flow with air an just fluid. Once you do that top off your reservoir and you should be just fine. Hope this helps, and if you have any more questions please feel free to ask.

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The engine coolant level/temperature light came on in my 2007 volks. jetta..where do I put the coolant?


You put the coolant into the large plastic circular shaped reservoir with the large black plastic cap, near the firewall at the back of the engine, on the drivers side.

But it is very serious that you do not know where to put coolant, because that means it has never been checked.
Once it is over heated, then the thermostat also needs to be replaced.
You must also find out why it is low, since it should never be allowed to leak at all.
You need to perform a coolant system pressure check, with what is basically a pump that you replace the cap with.
You over pressurize it and watch for leaks that allow pressure to drop.
Then you start the engine, rev it up, and check for head gasket leaks that would cause pressure to oscillate.
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Coolant reservoir low


IT is normal to lose a little coolant over time, but when you replace it, use a mixture of the appropriate coolant with a mixture of DISTILLED water. If you continue to lose coolant, you may have a leak in the system that can be tested for by placing it under pressure. The radiator cap can be a problem.

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1 Answer

Car runs hot


Look for low coolant and be sure to have heater on high when checking coolant level...

Hotter than 1/2 way is not necessarily a problem, do the fans cycle on and off?

You are most likely slightly low on coolant. I also suggest that you pressure test the system as well as the cap. Leaks allow coolant to escape and your vehicle is fussy about perfect level...

REMEMBER that when you release the pressure on a cooling system, non boiling coolant can now boil! Many people get seriously hurt... This is NOT indicative of a problem, but rather NORMAL physics, just crank it in to your proceedure...

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1 Answer

Low coolant light always on


Low coolant means just that, find out if the system is really low or the light is receiving a false signal from the low coolant sensor, just check the level in the coolant recovery tank and the make sure the radiator tank is full, if you are low on coolant then check out why, a leak is probable, most likely a water pump or hose related issue, and no a bad thermostat will not in itself turn on the low coolant light unless the engine boils over and the system becomes low. Remember never ever open a radiator cap on a hot engine, you would be surprised how many professional mechanics get burned this way, be careful..

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