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Old 8th October 2019, 18:47   #1
Alexa
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Default Themrostat problem

I bought the new thermostat (Automega) with housing for 1.1 Saxo.The problem is, it want open when the engine temperature rises, so I got overheating. Coolant was added and bleed screw opened,heating was on (works) ,but still it doesn't open.I checked thermostat on 1.4 VTS and it runs normally.

For some reason this valve is dry,whe I try to bleed it???


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Old 9th October 2019, 15:30   #2
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Air in the system.
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Old 9th October 2019, 18:43   #3
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1.1 is really notorious for changing coolant.If it's the air how come it's so hard to kick it out?
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Old 9th October 2019, 18:45   #4
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The coolant usually comes out of that bleed nipple last,you'll hear a hiss then bubbles followed by coolant.
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Old 10th October 2019, 07:38   #5
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Itís not hard youíre probs just doing it wrong. Loads of guides on how to do it on here, have a search.
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Old 11th October 2019, 13:06   #6
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You must bleed these engines cold with the engine off!

You need to create a header of water, I use a 2 litre bottle with the bottom cut off.

Put the bottle in the radiator cap and fill it - you can get special funnels but I can't remember what they're called. You must keep this bottle nearly full at all times.

1.) You need to bleed the radiator first, then close it when there's no bubbles.
2.) then the coolant housing (5mm hex/allen key?) then close it when it flows smoothly.
3.) then the bleed cap at the back, then close it when the coolant flows smoothly.

If you don't do it in this order, it will overheat.

Anyone who tells you another method is wrong and just got lucky that they got the air out.

Over time, the excess coolant will spill out, the "full" level is quite far down the radiator tank.

p.s having the heater on the car makes no difference, these cars don't have heater valves. the core is always open.
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Old 11th October 2019, 15:58   #7
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Quote:
Originally Posted by MartinObviously View Post
Anyone who tells you another method is wrong and just got lucky that they got the air out
Nudes or it never happened!!!!
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Old 21st October 2019, 16:56   #8
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@Martin

Where do you use 5mm key???
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Old 21st October 2019, 20:37   #9
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Quote:
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@Martin

Where do you use 5mm key???
Right hand side of the picture, above the blue connector, the head of the bolt is horizontal towards the passenger wheel.
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Old 21st October 2019, 20:38   #10
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Underneath the blue connector, in that general area. The hose on that side of the engine returns to the radiator. In that housing there is an Allen headed bleed screw.
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Old 21st October 2019, 21:34   #11
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You mean plug screw on housing for temperature sensor?
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Old 21st October 2019, 23:23   #12
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Quote:
Originally Posted by Alexa View Post
You mean plug screw on housing for temperature sensor?
Yes, that is the one which he means to be bled.
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Old 22nd October 2019, 17:40   #13
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Sorry I never saw the tag,

Yes it's a small brass screw on that housing.
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Old 23rd October 2019, 09:05   #14
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Since I was running out of patient,I went to my buddy and used this

https://www.aliexpress.com/i/32990020881.html

to pump out the remaining air. Very useful staf, so I recommend it.
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Old 23rd October 2019, 18:26   #15
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Quote:
Originally Posted by Alexa View Post
Since I was running out of patient,I went to my buddy and used this

https://www.aliexpress.com/i/32990020881.html

to pump out the remaining air. Very useful staf, so I recommend it.
That wont bleed properly because the radiator isn't the highest point.

You won't know either, because the temp sensor won't tell you.

If you're happy with it, then okay.
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Old 23rd October 2019, 22:25   #16
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When I replaced my radiator, I bled all 3 of the correct spots, I squeezed the coolant pipes too to move the coolant around. If you have air pockets at the bleed points, the system won't work properly.
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