![]() seems I've read they start to show problems around 100K miles and then one problems leads to another-constantly chasing down micro-leaks. IMO-the Coolant systems "suck" (poor design) on the e-46. angry at myself for not DIY on that one cause its easy to replace fan on the manual tranny e46 with parts on line at about $80Ĭonstantly chasing micro-leaks in the system, topping off coolant, replacing temp sensors, replaced thermocouple/thermostat, almost all coolant sensors on coolant lines and system, Nevertheless, the float stick was still floating and there was still some fluid left inside the reservoir. I checked the coolant reservoir and float stick was slightly below the 'low line'. The bottle crack was a symptom of The fan motor not operating at idle-thus the system would get too hot if I did not drive it but left the car idle for 15 to 20 mins. In the last few days the 'low coolant' light has been intermittently turning on on my friends BMW X3 (2007 70K miles). I replaced it myself, some of the hose connection / reconnection were a bittch to remove and replace, suggest replacing all connecting hoses when changing reservoir bottle. The coolant level check using the expansion tank float is INVALID unless the coolant is previous filled according to BMWs procedure. So I kept driving the car and thinking about it. ![]() I heard a small gurgle and hiss and noticed that the tank was full. I think I had waited about an hour before opening the tank. So I decided to check my coolant expansion tank. Hi temp Glass filled Nylon-(under designed imo) I recently had my coolant light come on intermittantly on my 2006 BMW X3. This is a common problem, can only see it "weeping" when engine is hot and crack on the bottle is under pressure from boiling coolant, the bottle is supposedly HT PA66 GF. ![]() I have had so many coolant system issues on my E46 Manual trans 2000 323i (108K miles)ġst was a hairline crack in the reservoir fill bottle, the crack was on the left front radius corner looking down from the top (direction of crack was top to bottom) was about 3/4" long. ![]()
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