pureboiracer 0 Report post Posted February 11, 2008 got my new e30 325i the other day. and the last few days it has been using quite abit of coolant, the check light only seems to come on when i give it a little sh*t but driving nicely it doesnt use coolant too fast. there are no visible signs of leaks. anyone got any ideas? Quote Share this post Link to post Share on other sites
bravo 35 Report post Posted February 11, 2008 If its not leaking, it has to be going somewhere, like out the exhaust pipe. Suspect blown head gasket. Do all usual checks for blown Head Gasket - oil in water, water in oil, etc. Quote Share this post Link to post Share on other sites
*Glenn* 854 Report post Posted February 11, 2008 If its not leaking, it has to be going somewhere, like out the exhaust pipe. Suspect blown head gasket. Do all usual checks for blown Head Gasket - oil in water, water in oil, etc. Could also be a leaking heater matrix Quote Share this post Link to post Share on other sites
pureboiracer 0 Report post Posted February 11, 2008 checked head gasket this morning with this blue liquid that turns yellow when it detects exhaust gases and showed up fine. i found when you drive nicely it doesnt loose any water. suspect a blockage somewhere? Quote Share this post Link to post Share on other sites
Palazzo 477 Report post Posted February 12, 2008 Frost plugs? Quote Share this post Link to post Share on other sites
*Glenn* 854 Report post Posted February 12, 2008 Frost plugs? Its not visably leaking though Quote Share this post Link to post Share on other sites
Palazzo 477 Report post Posted February 12, 2008 Good point. Ours left a few drops on the floor each night and I think he mentioned it loses more in "hard" driving. Quote Share this post Link to post Share on other sites
QuickSilver 0 Report post Posted February 12, 2008 a leak in a hose/gasket that only leaks while under more pressure ie, hard driving??? Quote Share this post Link to post Share on other sites
Hartage 0 Report post Posted February 12, 2008 Viscous fan knackered?? Air lock in system?? Quote Share this post Link to post Share on other sites
ducatiss 1 Report post Posted February 12, 2008 Have a look round all the hoses for tell tale white marks (dried coolant). Check your pressure cap is sealing properly also and that there is some pressure in the hoses when the system is hot. Check all clips securing hoses. After all that it could be a pin hole in the radiator. Good luck. Quote Share this post Link to post Share on other sites
keen 6 Report post Posted February 26, 2008 Have you bled the system. Then run your checks? It is going somewhere if you are filling the overflow bottle regularly. another place to check is the throttle body heater hoses these can perish behind the intake manifolds where they are hard to see. Quote Share this post Link to post Share on other sites
Court M3 0 Report post Posted February 26, 2008 do you smell coolant with the heater on? Driver's side carpet wet? Could be the heater core or valve Quote Share this post Link to post Share on other sites
JiB 0 Report post Posted February 26, 2008 I had the same problem, get it pressure tested. Mine turned out to be a bottom hose. Quote Share this post Link to post Share on other sites
