shcubbebah Posted March 2, 2015 Posted March 2, 2015 interestingly enough I had my cdi overheat on me in a very short time on a cold -29 day in Winnipeg, however has now happened for a third time. Cold started the engine not plugged in barely started. pheeww i idled the engine for 1 minute then proceeded to work and noticed i received my first bubble of heat rather quick only after 2 kms or maybe 3 minutes total engine run time. then received my 2nd bubble after another 2 kms.and only a minute later or 1 km i got my third bubble that i never saw once in winter especially one of our coldest days i knew there was something wrong aswell noticed no output from heater matrix as my windows refused to defrost with cold air. i then got my fourth bubble and knew i was overheating. so i pulled over and let it cool down. Now here is my question. if the cooling system is always circulating coolant though heater matrix regardless of the thermostat being open or closed. then why did i overheat with no output from heater? is my Canadian model smart cooling system run differently than what others have described on club smart ? on a day -26 and warmer i have never had this issue occur on a warmer day. and i will start to receive reasonable heat usually just before my second bubble shows on the cluster. my only possible explanations are my heater matrix flow is controlled by thermostat and i am having occasional issue with thermostat sticking closed. and my water pump has to be still in good condition if on slightly warmer days (-24) i get heat as normal. and i hear no belts squeal. so coolant flow through system should be sufficient. i am stumped. any other suggestions? or explanations? Quote
tolsen Posted March 2, 2015 Posted March 2, 2015 Note expansion tank cap, oil cooler and EGR cooler are not shown. Coolant is always being circulated through heater matrix. I suspect your overheating problem is caused by weak coolant mix, i,.e. coolant turns into slushy ice which blocks flow of coolant. Time to drain a litre or two and top up with neat antifreeze. 1 Quote
Francesco Posted March 2, 2015 Posted March 2, 2015 Sounds like an air lock, possibly. For peace of mind I'd drain the system, fill with fresh, MB-approved 50/50 mix, and bleed via the sensor at the top of the engine. Note TK's helpful tip to tie a short piece of twine (string) around the axle shaft to make any coolant that hits it go into your catch basin. 1 Quote
shcubbebah Posted March 2, 2015 Author Posted March 2, 2015 That makes a lot of sense I should receive my plug any moment I will do that when it comes. but before I can do that the girlfriends car blew head gasket/internal waterpump, all internals look like cheese wiz. so that is now in the garage and of course has a higher priority (2002 Chrysler sebring with 2.7 v6) Quote
tolsen Posted March 2, 2015 Posted March 2, 2015 Check freezing point of your antifreeze. I guess it is well above - 29 C. Quote
Francesco Posted March 2, 2015 Posted March 2, 2015 One would think a 2002 Sebring would be a DNR. Time to go car shopping! Quote
shcubbebah Posted March 4, 2015 Author Posted March 4, 2015 Please fill me in on what DNR means? Quote
shcubbebah Posted March 5, 2015 Author Posted March 5, 2015 Yes due to internal water pump failures they are a lemon. I'll have to buy her a smart Quote
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