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Old 8th October 2019, 11:22   #406
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Default Re: What to do if your Engine Overheats on the road

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Originally Posted by rdst_1 View Post
Were you able to hear the radiator fan working when the car was overheating.
I did not observe since I did not stop as I was on a highway and it was dark. Instead I slowed down and noticed the temp needle going back to normal. I could not hear it since the car was moving as well. But, once I was back home, parking and just before turning off the engine, I could hear it working.

In other words, fan is spinning, coolant levels are normal in the tank and radiator. There is no leak apart from a bit of coolant that came out from the tank under pressure probably during the overheating time. I drove in heavy traffic with the AC on during the day as well as on the return after this highway drive when it happened, and everything was normal again.

I will be getting the radiator cleaned soon although I feel if it was a partially clogged radiator, the issue should have happened in slow moving traffic with the AC on as well, which it does not. Instead it happened when I was doing high speeds on a highway after sundown, with the AC off.
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Old 8th October 2019, 12:43   #407
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Default Re: What to do if your Engine Overheats on the road

Ideally take the vehicle to a trusted radiator specialist. They will be able to diagnose it.

It does sound like it may well be a semi-blocked radiator by leaves/dirt. In an ideal world you would also do a radiator flush as that will remove the gunk inside, making it more efficient.
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Old 8th October 2019, 14:09   #408
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Default Re: What to do if your Engine Overheats on the road

Open the radiator and coolant reservoir cap once after starting the engine when cold and leave it for few seconds and put the caps.

If coolant was replaced during last service, it is possible that that coolant lines are blocked due to air lock.
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Old 8th October 2019, 16:40   #409
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Default Re: What to do if your Engine Overheats on the road

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I will be getting the radiator cleaned soon although I feel if it was a partially clogged radiator, the issue should have happened in slow moving traffic with the AC on as well, which it does not.
While you're at it, also check the fan speed. Sometimes the radiator fan is working but you can see it's noticeably slower to spin, which could result in an overheating issue like you experienced and a coolant spill.
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Old 14th October 2019, 15:33   #410
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Default Re: What to do if your Engine Overheats on the road

My Tata Zest has been a victim of coolant and oil mixture overflow. There was no low coolant/high temperature warning as such on the instrument console. Although, I did notice the engine temp. to be higher than the usual by a notch only after the radiator was abnormally running continuously. Parked aside and opened the hood and saw the mixture sludge oozing out of the coolant tank.

I was advised by a nearby FNG mechanic on call to wait for 10-15mins till the engine cools down and then drive it to them. The FNG quoted 15k, 2 day repair, that includes changing oil cooler and cleansing the entire radiator, coolant system.

Thought it was expensive and I took it to the nearest Tata motors service station(about 4kms). The service advisor is suspecting a conked oil cooler. As per him the entire exercise of cleansing would take 2-3 days and would cost about 20-25k if radiator is replaced as well.

Below is an image of the oil, coolant oozing out, the moment the coolant cap is removed
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What to do if your Engine Overheats on the road-20191014151350.jpg  

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Old 5th November 2019, 23:18   #411
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Default Re: What to do if your Engine Overheats on the road

I was on a long drive during last weekend and all of a sudden lost the A/C and noticed the temperature needle raising up to my surprise. Immediately I switched off the A/C and then the needle came back to normal. I assumed something wrong with the A/C compressor and believed that is the reason the temperature went up. Drove for a few more kms and then the temp started raising and this was a shocker. As I was driving through a deserted place I continued to drive but at a very slow speed which kept the temperature display at normal level but intermittently going up and down. Drove a few kms until I found a mechanic. Opened the bonnet from there and as expected saw that the coolant has leaked out. We diagnosed it to a crack on the radiator top tank. The mechanic guy made a few phone calls and found the top tank available with one of his partner but it was quite far away and he asked me to wait. He went and picked it up and took about 3 hours all together.

What to do if your Engine Overheats on the road-r1.jpg
Top tank which had a crack on it.

And in the process found out that it was all clogged inside the radiator fins. He did a proper cleaning of all these and fixed it back along-with.

What to do if your Engine Overheats on the road-r2.jpg

Car: Baleno Sedan
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