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Old 24th November 2021, 12:49   #1
macafee2
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Default Overheating but not a Rover

Friend has messaged to say the overheating light has come on on their car, no idea what car.
They took it to the garage and it has water but not how much.
They say the injectors and pistons need changing or change the top half of the engine.
I cant see pistons and injectors failing as part of over heating.
what are your thoughts?
The car was going up a mountain when the light came on and went off when going down. Could happen if going up quickly, high revs or lugging a lot of weight or the fans not working.


If the car drives, feels and sounds ok and has enough water apart from perhaps an oil change I am tempted to say leave alone. what are your thoughts?

I have asked what car they have and will add this to the thread incase it makes a difference.

macafee2

The car is 2016 Mazda CX5

Last edited by macafee2; 24th November 2021 at 13:09..
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Old 24th November 2021, 14:01   #2
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Quote:
Originally Posted by macafee2 View Post
Friend has messaged to say the overheating light has come on on their car, no idea what car.
They took it to the garage and it has water but not how much.
They say the injectors and pistons need changing or change the top half of the engine.
I cant see pistons and injectors failing as part of over heating.
what are your thoughts?
The car was going up a mountain when the light came on and went off when going down. Could happen if going up quickly, high revs or lugging a lot of weight or the fans not working.


If the car drives, feels and sounds ok and has enough water apart from perhaps an oil change I am tempted to say leave alone. what are your thoughts?

I have asked what car they have and will add this to the thread incase it makes a difference.

macafee2

The car is 2016 Mazda CX5
Depending on height above sea level and how hard the car is working, I would suspect weak fuel mixture, followed or aggravated by a poor thermostat or clogged radiator fins. A top end overhaul would be right at the bottom of my suspects. I suppose injectors could play a part but simple diagnostic tests/codes would show the likelihood.
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Old 24th November 2021, 15:43   #3
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The car is only 5 years old. I smell a rat.

I seriously doubt anything serious is wrong. Absolute worst case would be a head gasket and I even doubt that.

The friend needs to get the car back tout suite and take it somewhere else.
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Old 24th November 2021, 15:48   #4
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Quote:
Originally Posted by macafee2 View Post
Friend has messaged to say the overheating light has come on on their car, no idea what car.
They took it to the garage and it has water but not how much.
They say the injectors and pistons need changing or change the top half of the engine.
I cant see pistons and injectors failing as part of over heating.
what are your thoughts?
The car was going up a mountain when the light came on and went off when going down. Could happen if going up quickly, high revs or lugging a lot of weight or the fans not working.


If the car drives, feels and sounds ok and has enough water apart from perhaps an oil change I am tempted to say leave alone. what are your thoughts?

I have asked what car they have and will add this to the thread incase it makes a difference.

macafee2

The car is 2016 Mazda CX5
If this is not a con by an unscrupulous garage, I suspect there may just be a miscommunication or misunderstanding between yourself and the person relaying the information.

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Old 24th November 2021, 17:04   #5
macafee2
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thank you I have passed all replies to my friend.

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Old 24th November 2021, 21:09   #6
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That's misinformation from a dodgy garage.--What make of car is it ??

My wife's Citroen C4 did exactly the same thing several times when towing a caravan up into the Pyrenees a few years ago. Has been perfectly OK since when not worked so hard.

Keep your money in your pocket.---
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