water problems- updated again lol
Turbo Mini Forums

Im having a slight proplem with the water in my metro turbo.
It runs fine and holds a temperature between half and 3/4 on tickover with the fan on. The problem im having is when I turn her off all the water bubbles out the top of the bottle round the cap. The only way it wont is if i only put a slight ammount of water in ( just a puddle in the bottom of the tank), this still leaves the temperature fine.
There is a small ammount of steam coming out of the cap when its running but only bubbles over when engine stops.
All the pipes are hot, ive removed the thermostat, and done a comp test! anything else?

Any suggestion welcome.
si.

Edited by 1976_mini on 4th Nov, 2006.

it may b small but it purfectly formed
http://photobucket.com/albums/v340/1976_mi...roject%20turbo/

electric fan?

yea, the metro turbo has an electric fan as standard!

it may b small but it purfectly formed
http://photobucket.com/albums/v340/1976_mi...roject%20turbo/

Sounds like your cap is not holding pressure. Is the seal OK?

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

These caps are prone to failing, chuck it and buy yourself a NEW one. If that doesn't cure it then it may be the head gasket....... :(

thanks people, had a suspision of the cap, now others have suggested it ill try that.........1st anyway, lol.

it may b small but it purfectly formed
http://photobucket.com/albums/v340/1976_mi...roject%20turbo/

proble the easiest and cheapest thing to try first anyway!
it would be a shame to do somthing abit more expensive/involved, then to find out its the rad cap!!

My build thread..

http://www.turbominis.co.uk/forums/index.php?p=vt&tid=542985

ok, so changing the cap has stoped water bubbling out of my cap when i turn her off, but it never cured the overheating problem. Ive changed the headgasget, checked block and head surfaces for warping, and wired the fan in permenantly. But still shes overheating, ive tried flushing the system thru to see of theres an air lock but i cant see any bubbles at all.

Any more ideas folks, im at the end if my tether with it now, n the way im going the next step for her is car heaven!

it may b small but it purfectly formed
http://photobucket.com/albums/v340/1976_mi...roject%20turbo/

Is the radiator full of shit? Are you SURE it is clear?

yep, im sure. ive even put some rad clear stuff in aswell.

it may b small but it purfectly formed
http://photobucket.com/albums/v340/1976_mi...roject%20turbo/

Have you checked your ignition timing. A lot of retard can cause overheating.

Does it run OK otherwise?

Is it just your gauge wrong?

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

Hi,
Feel the rad when it's up to temp, any cool patches?
Cheers,
Gavin :)

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My Mini build diary

I flush the rad out the opposite way the water normally flows, its supprising how much crap aomes out.

Also give the outside of the rad a good clean, crap on the outside won't help the heat dissipate efficiently either.

With the rad cap off does the water bubble when you rev the engine?

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1/4mile in 13.2sec @ 111 terminal on 15psi

ive changed the temp sender for a new one so its not the guage, i dont have any cool patches in the rad either. The timing is fine but i am getting roughly 40mpg so could it be running too lean? it does run fine other than this problem and no the water doesnt bubble with the cap off n engine revving!

With the thermostat removed and the fan on permenantly id expect the temp guage to hardly move. Whats really happening is its running just over half temp at speeds up to 50mph but anything over that and the temp goes up just as quick as the speedo!

it may b small but it purfectly formed
http://photobucket.com/albums/v340/1976_mi...roject%20turbo/

its running lean is my guess

well i put the thermostat back in today after talking to avon bar. The young lad there suggested using a thermostat blanking sleeve but i never had one. He wasnt completly sure y but what he said was that if you take the thermostat out you end up with a reduced waterflow in cylinders 2,3,4 thus making the engine run hot.
Thinking about it the water would take the route of less resistance so without the thermostat in place there is nothing for the water to take risistance on! Am i thinking on the right track or talking s**t?

Thought i would let you all no my progress incase somebody else has the same problem!

it may b small but it purfectly formed
http://photobucket.com/albums/v340/1976_mi...roject%20turbo/

A thermostat will not make the engine overheat unless it is stuck shut, and you would know this as the main rad hoses would not get hot. The thermostat is easy to test, put it in a pan of boiling water and you will see it open if it is a good one.

Removing the thermostat does knacker up the water flow though the block, and causes the cylinders at the flywheel end of the block to run hot.

From all you have said above it sounds like the car is running very lean hence causing this overheating. You need to get it on a gas analyser and have it set up, and also have the ignition timing set. If you carry on allowing it to overhet you will soon knacker it once and for all.

thanks for the help tom, confirmed my suspisions

it may b small but it purfectly formed
http://photobucket.com/albums/v340/1976_mi...roject%20turbo/

i had this very same problem, what mine was was, the head studs were not dune up properly to the right torque which caused the water to bubble out the radiator after a good run, anything over 50 mph and the temp would shoot up really quick. check the torque settings on your head studs

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