bigrob 0 Report post Posted April 20, 2010 Was driving this morning and low coolant light comes up on dash, topped up levels and noticed general area around coolant tank was wet. Drove back home (about 5km) and coolant light comes on again. This time when I opened the hood steam was gushing out of some kind of valve I suppose (looks like a hole on a coolant pipe just behind the cap on the coolant expansion tank) The steam continued gushing out for another 2-3 minutes after turning off the engine. Checked the temp gauge & was about half way up, more or less were it usually is. Any one with an idea what to expect when I visit my mechanic tomorrow? Quote Share this post Link to post Share on other sites
APT 179 Report post Posted April 20, 2010 (edited) plastic expansion tank has cracked my guess, it happend to mine Edited April 20, 2010 by APT Quote Share this post Link to post Share on other sites
kerry 10 Report post Posted April 20, 2010 ^++11 most common failure to the e46. Quote Share this post Link to post Share on other sites
bigrob 0 Report post Posted April 20, 2010 Another look under the hood in daylight and a bit of time searching the net has led to the discovery that a 'vent screw' is missing (broken/fell off) on the coolant pipe just behind the expansion tank. Quote Share this post Link to post Share on other sites
*Glenn* 854 Report post Posted April 21, 2010 Another look under the hood in daylight and a bit of time searching the net has led to the discovery that a 'vent screw' is missing (broken/fell off) on the coolant pipe just behind the expansion tank. Common...replace the hose. The expansion tank, radiator, water pump & thermostat should be checked as well Quote Share this post Link to post Share on other sites
