R50/R53 :: Hatch Talk (2002-2006) Cooper (R50) and Cooper S (R53) hatchback discussion.

R50/53 Replaced coolant tank and

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Old 12-03-2013, 04:39 PM
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Replaced coolant tank and

This summer i had my coolant replaced by local shop. After that i could smell coolant whenever i got out of my car for several months. I checked the coolant tank and sure enough it was leaking onto the drip shield.
Picked up new tank and put it in today. Filled the tank and opened up the bleed screw up front (couldnt find the other one) Ran the engine and turned on the heater. Ran it for a long time and nothing ever came out of the bleed screw and the fan never came on. WTF Any ideas?
 
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Old 12-03-2013, 04:46 PM
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I usually take out the bleed screw. put in a tiny funnel and top it off thru there. It will fill the bubble that is behind the thermostat. your coolant is cold and your thermostat is closed. that is why you don't get any coolant out. I have done it like this many times and always seems to get out every last bubble of air.
 
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Old 12-03-2013, 06:34 PM
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It means your thermostat never opened....
You might need to run at a slightly increased rpm to make more heat...so it will open fully.
 
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Old 12-03-2013, 06:48 PM
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Originally Posted by ZippyNH
It means your thermostat never opened....
You might need to run at a slightly increased rpm to make more heat...so it will open fully.
Yea your prolly right, its like 25 degrees out so i could see that. Anyone have any luck finding the other bleed screw?
Doesn't leaving the cap off the tank while it runs also bleed the air out?
 
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Old 12-03-2013, 11:35 PM
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Originally Posted by Mark97xp
Doesn't leaving the cap off the tank while it runs also bleed the air out?
Nah the water in the car will boil into the expansion tank, make's a mess of the engine… I've been doing the same thing all day with no luck… Anyone else with an idea? There's supposed to be a bleed/drainage plug on the back of the engine block… But i can't find it..
 

Last edited by Stoker; 12-03-2013 at 11:47 PM.
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Old 12-03-2013, 11:44 PM
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Originally Posted by Stoker
Nah the water in the car will boil into the expansion tank, make's a mess of the engine… I've been doing the same thing all day with no luck… Anyone else with an idea? There's supposed to be a bleed/drainage plug on the back of the engine block… But i can't find it..
http://www.pelicanparts.com/techarti...arge/Pic13.JPG
Heres a pic but i still could not find it.
 
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Old 12-03-2013, 11:47 PM
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On the Pelican Parts "How To" some guy wrote that he fills the cooling system with a small funnel through the bleed screw hole in the top radiator tube…says he never gets air bubbles.. I'm gonna try that tomorrow ")
 
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Old 12-03-2013, 11:55 PM
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Yea i seen that......seems like air would still get in.
 
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Old 12-03-2013, 11:57 PM
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Originally Posted by Mark97xp
http://www.pelicanparts.com/techarti...arge/Pic13.JPG
Heres a pic but i still could not find it.
That bolt is way deep down under the intercooler top right hand side, To the left of the big wiring harness. to get better access take the intercooler diverter frame off. That's the heating system bleed nut, you don't need to undo it all the way. What ever you do don't drop it… It's a pain to find ") plus, its a 5.5 mm bolt. so, if you loose it...
 

Last edited by Stoker; 12-04-2013 at 12:02 AM.
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Old 12-04-2013, 09:30 AM
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Still not quite understanding the bleeding process. The top radiator hose with the inline bleeder screw never did bleed out any coolant, nor did it seem any coolant was in the hose If the thermostat doesnt open then this hose will be empty? I ran the engine for a good 10 or 15 minutes with the cap off and the bleeder screw open.
 
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Old 12-04-2013, 11:25 AM
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Originally Posted by Mark97xp
Still not quite understanding the bleeding process. The top radiator hose with the inline bleeder screw never did bleed out any coolant, nor did it seem any coolant was in the hose If the thermostat doesnt open then this hose will be empty? I ran the engine for a good 10 or 15 minutes with the cap off and the bleeder screw open.
correct...
REV the motor...make some heat...
when the thermost opens...coolant will shoot out like a geyser...
 
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Old 12-04-2013, 03:06 PM
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Finally found the other bleed screw by the t-stat housing. Its a mother to get to.....if you take the intercooler bracket off it is a little easier to get a socket on it. The bolt is a size 8mm and you will need a pretty good extension to reach it. Also got my car warm enough to open the t-stat and bled the top radiator hose so all is good now. Thanks to your replys
 
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