I was searching over on e90 and found a guy, without a tune, that had the exact same thing happen to him, turns out he had a bad water pump, not sure whats going on with me, all I know is since I topped her off, she's be running fine. The coolant was at the min i added enough to get it the max, not sure how much that was. I'm running procede v3 and no it doesn't bypass ecu feedback as far as i know. I would think that yes, the ECU would go into limp mode, but I never got a half-engine light, just stalled. We don' have an engine temp gauge only oil temp, which mine never gets over 250. One of the things Dinan said they did is increase the coolant pumping rate, something that some (or all) piggybacks don't do. BMW probably calibrated their cooling based on the OEM tune, so who knows what's going on. From a non-linear heat flow perspective, it is possible that you could be running hot in areas undetected or uncompensated by the factory computer settings. If you were running high boost and higher octane gas, I wonder if the engine management system can function correctly by monitoring coolant temperatures only (is that how it works?). If you are running high boost, could your engine be overheating at points not monitored specifically by probes? Would your tune bypass any ECU feedbacks? ![]() Would the ECU normally regulate overheating by going into limp mode? Since I'll do this while the car isn't being driven, I'll probably replace everything on my list, hoping that it will go another 80-90K miles without much worry.It sounds like you fixed the problem. REIN includes new clamps with the short hose that they sell, and the replacement spring clamp has "ears" to install / release it. He cuts the factory clamp on two sides to remove the short hose from the inlet pipe. Instead, he takes advantage of the extra space when the water pump and T-stat are removed to get good access with a Dremel tool. His son said that he never removes the inlet pipe, because it's really hard to get it re-installed into the block. I asked my question about the water pump inlet pipe and its short little hose to the water pump. Thanks for quick response and reminder about the Pierburg pump !Īnd more info from another source: I have a friend who lives nearby and drives a 2006 3.0i roadster - his son is a BMW mechanic, and he just changed out my friend's oil cooler and oil filter housing gaskets, plus a few hoses. 11428637820īMW Oil Filter Housing Gasket. 11537545890īMW Coolant Tank Recovery Hose. 11537521049Ĭylinder Head to T-stat Hose (REIN, Alum Flange). VNE coolant temperature sensor (for fan). ![]() 17117573751Įxpansion Tank Mounting Plate. 11517586925īMW Engine Coolant Thermostat (Borg Warner). _Part Description_Part Number_īMW Electric Water Pump (Pierburg). The BMW production hose clamp has no ears to remove the clamp from the hose onto the pipe, so removing it on a bench would be the easier thing. Key Question: When the water pump and T-stat are out, can the Water Pump inlet pipe ( BMW part number 11537516414) be easily removed from the block and reinstalled? The REIN replacement hose for the rubber part of that pipe, plus new gasket and O-ring will save over $100 vs new pipe. How necessary is the expansion tank mounting plate ? ![]() The Oil Cooler and Oil Filter Housing gaskets are due - when oil film is wiped off, it re-forms within a week. ![]() I would appreciate input on which things will really need replacing out of my "most everything" cooling parts list which appears below.įor certain I need to replace the "Mickey Mouse flange" coolant line. While my Z4 has low miles, it is a sixteen year old car, and my E46 was only ten years old when I did most of its cooling system. I replaced most hoses, radiator, WP, T-stat, and radiator on that car around that mileage, but I waited until 167K miles to replace the heater hoses – barely in time because a plastic hose fitting into the cylinder head crumbled as I removed it. My 2005 E46 with an M54 engine seemed to need a lot of cooling system attention by 100K miles. I plan to continue driving it daily, about 8 months a year, 10-12K miles per season. I will likely add another 2K miles before I store it for Winter. No real concerns, but it is 16 years old. I have a 2006 3.0Si coupe with about 86K miles on it. I'm looking for advice on cooling system maintenance for N52 engined Z4’s.
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