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Radiator top hose came off

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Old Oct 12th, 2019, 19:39   #1
Thejdizzler
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Smile Radiator top hose came off

Hi all, accelerating quite hard today and all hell breaks loose! I pull over and realise the top radiator hose has come off from the engine block, I manage to get it back on and tighten it up a bit. Now the Dash warning light for Exhaust emission has come on. Obviously the light came on when the pipe came off but is it a direct result or could something else have failed? I am a bit worried, do I need to replace the hose/ take it to the garage, how can I get rid of the warning light if refixing the hose has sorted the issue? Thanks in advance.
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Old Oct 12th, 2019, 19:51   #2
griston64
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Did the car overheat ? If not just pull fuse 1 leave it for a minute and it should go off when you re start. check the hose and also the stub on radiator as it's a known weak spot.
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Old Oct 12th, 2019, 20:07   #3
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No overheating, I had only set off 3 mins earlier, first bit of open road, put my foot down and then all of a sudden nothing. I’ll double check the connection. I am running 10PSI on the turbo- could that have caused it or Is it just a coincidence as it’s a weak spot.
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Old Oct 12th, 2019, 20:16   #4
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Quote:
Originally Posted by Thejdizzler View Post
No overheating, I had only set off 3 mins earlier, first bit of open road, put my foot down and then all of a sudden nothing. I’ll double check the connection. I am running 10PSI on the turbo- could that have caused it or Is it just a coincidence as it’s a weak spot.
The rad stub is plastic so can be weak. I take it yours came off at the Thermostat housing ?
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Old Oct 12th, 2019, 20:20   #5
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High boost shouldn't make the hose come off but you could have a problem with your head gasket. You would need to do a leak down test to check whats going on
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Old Oct 12th, 2019, 20:41   #6
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You don't say what car but, assume you mean the lambda engine management light.

The ecu will have have triggered it when 'things went wrong'.

Suggest you disconnect the battery negative terminal (or I think people say fuse No.1) which I find easiest to re-set the system. Hopefully, it will not come back on. If it does read the codes depending on what system you have.

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Old Oct 12th, 2019, 21:50   #7
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This is the one with the smokey engine? If so its all pointing to a failed head gasket
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Old Oct 12th, 2019, 22:33   #8
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No engine has been fine, no smoke or anything, hopefully just a one off. I’ll reset the warning light and see if that works.
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Old Oct 12th, 2019, 22:39   #9
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Try starting the car from cold with the expansion cap off and let the car idle. If it bubbles a little and then stops it should be fine. If it keeps bubbling and kind of surging up and down it could mean you have head gasket issues.
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Old Oct 12th, 2019, 22:42   #10
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I’ll give it a go tomorrow and let you know how I get on, it did feel a bit loose as I had to tighten it a bit to get it to stay on, fingers crossed not the head gasket!
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