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Showing posts with label Cooling System Troubleshooting. Show all posts
Showing posts with label Cooling System Troubleshooting. Show all posts
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Engine Temp Gauge Reads High After Starting

Engine temperature gauge reads high

The Engine Temp gauge on the dashboard indicates high temperature, just after starting the engine. There are four reasons why the temperature gauge reads high, the lack of engine coolant, collapse radiator hose, faulty water pump, or thermostat. To determine the real cause of the problems, do the car problem diagnosis.


Car Troubleshooting

First, check the coolant level of your car, open the hood and locate the coolant reservoir, if you are not sure about the location, refer to your car owner's manual. On the reservoir there is a marking that shows the recommended level, the coolant must be at the maximum level.
Temperature gauge reads high
Now, check also the coolant level on the radiator, before checking the radiator make sure that the car engine was turned off and the engine was cold, if the engine is hot, let it cools down then open the radiator cap and look down the radiator fill hole. The coolant should cover the metal fins inside the radiator if not then the coolant is low and this causes the Temperature gauge to reads hot.

Radiator coolant

However, if the coolant level is high, the next thing to check is the radiator hose. Turn the car engine on and observe the radiator hose, be careful while doing the observation so as not to get injured by a running engine, if you found out that the hose was collapse then obviously this causes the problem. The collapse hose is preventing the flow of coolant from the radiator to the engine which causes the Temperature gauge to read hot.

But, if the problem is not the hose and the radiator has enough coolant in it then the remaining reason that makes the Temperature gauge reads high after the engine has started is a faulty water pump or thermostat.

The water pump is the one that circulates the coolant through the engine and into the radiator. If the water pump is faulty it will not circulate the coolant through your car engine thus making the engine overheat. Same as for the thermostat, it is the one that keeps the coolant from reaching the radiator when the engine is cold, but when the engine is warm enough it will allow the coolant from the engine to reach the radiator if the thermostat is faulty even when the engine is warm enough it will still keep the coolant from reaching the radiator thus the temperature of the coolant inside the engine will keep on increasing until the engine overheat which causes the Temperature gauge reads hot.

Possible cause of temp gauge high reading after starting


(1) Low coolant level
(2) Collapsed radiator hose
(3) Faulty water pump
(4) Faulty thermostat.


How to fix the temperature gauge that reads high after starting

If the problem is a low coolant level, just add the necessary amount of coolant to fixed the problem, a 50/50 antifreeze/water ratio would do. However, it would be better to bring your car to a reputable auto repair shop to determine why the radiator losses a lot of coolants to cause your car engine temperature gauge to reads hot after starting it.

Hence, If the problem is a collapsed radiator hose, just seek out a replacement part in any auto parts store and replace the collapsed radiator hose.

As for the faulty water pump and thermostat, bring your car to a reputable auto repair shop and ask the mechanic to check the water pump and the thermostat to find out which one is causing the temperature gauge to reads hot and replace the problem parts if necessary.

More Engine Troubleshooting Guide
Car Engine Problems Troubleshooting Guide
Car troubleshooting guide for common car engine problems based on the technician experience, it will serve as a guide to solve your engine problem, select the article below related to your engine problem.

Learn more: Car Engine Problems Troubleshooting Guide


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Car is Overheating with Full Coolant


One common cause of the overheating problem is a lack of engine coolant. So, the first thing to do is to check the coolant level.

First, open the hood of this vehicle and remove the radiator cap. Only do this when the engine is cold. otherwise, you may burn yourself.  Next, look down into the radiator fill hole and check the coolant level (use a flashlight if necessary). The coolant should sufficiently cover the little metal "fins" inside the radiator. If this is not the case, the coolant level is low. On most vehicles, you can also check the coolant level simply by inspecting the coolant recovery tank. Refer to this vehicle's owner's manual regarding this approach.

If the coolant level is low, the lack of coolant is causing the overheating problem.

Obviously, an engine's cooling system must have the right amount of coolant to work efficiently. Since the coolant level is low (as you indicated), this (likely) is the main cause of this problem (the other possibility is a clogged radiator). We are guessing that the coolant level is only slightly low. Why?  Because the temperature gauge reads hot ONLY in hot weather.  On the other hand, if the coolant was extremely low, the temperature gauge would read hot regardless of what the outside temperature was (unless of course, it was very, very cold outside).

What to do?

Using a clean, empty container, make a 50/50 mix of water and anti-freeze (any auto parts store will carry anti-freeze). Then, when the engine is cold (say, in the morning), remove the radiator cap and pour just enough fluid to sufficiently cover the little "fins" inside the radiator. Replace the cap when done. How did the coolant level become low?  Has the radiator boiled over once or twice in the past?  This would account for it.


Alternatively, maybe there is a leak somewhere in the cooling system.  Have you ever noticed a puddle of coolant underneath this vehicle? If no, maybe it's an internal leak. like that which results from a blown head gasket.  If this is the case, white smoke will come out of the exhaust as you're driving. This is caused by coolant leaking into the engine's combustion chambers and burning off as steam. Whatever the case, please have this vehicle checked out by a mechanic.

"If the car is Overheating with full coolant, or the coolant level is not low, the possible problem is the radiator is clogged or the radiator is plugged."


Full Coolant Level

Let's examine this situation closely. First, if the temperature gauge reads hot in hot weather. That's not such a big deal. especially in stop-and-go traffic. But, the gauge should go down as soon as the vehicle speeds up. However, that's not the case here because of the "at any speed" part which implies that the gauge doesn't go down (or at least doesn't go down much) when the vehicle speeds up. This is the crux of the problem. There are really only two things that can cause this.

The first is that the coolant level may be a little low. However, this was ruled out. The other thing is that the radiator is clogged/plugged up and therefore, even when you drive fast, the air that "hits" the radiator isn't cooling the coolant. Put another way, a radiator is most effective in cooling the coolant (and thus the engine) when the vehicle is going fast. Since the temperature gauge reads hot "at any speed", the radiator must not be working well.

What to do?
First, clean any bugs, debris off the face of the radiator with hot water and a soft brush. Next, have the entire cooling system backflushed.  This is a procedure in which water is run through the cooling system in the opposite direction of normal coolant flow. This will remove much of the rust and particle buildup, restoring the efficiency of the radiator as well as other parts of the cooling system. You can do a backflush yourself quite simply.  Any auto parts store will carry a backflush kit.

How to Clean Radiator with Debris


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How to Check a Bad Radiator Cap

How to Check a Bad Radiator Cap

Damage or leaking radiator cap is one of the reasons for the engine overheating, therefore, it is also necessary to check the radiator cap from time to time. How to Check a bad Radiator Cap

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