Overheat Warning

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Jan 1, 2011 | 10:53 PM

#11

pukka

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From: Atlanta, GA

My Ride: 2008 535i: (8/07 Build) Metallic Bronze, Beige NASCA Leather, Ventilated Seats, Sport Pkg, Cold Wxr Pkg, Logic-7 Sound, HUD, Night Vision, PDC, Split Rear Seats, NAV, Premium Pkg, Comfort Access, HD Radio, Sport Auto Trans Current mods: M-Aero Kit, JB4, Motorcepts 6000k HID Foglamps Umnitza ICE-Lite 10w LED 6000k AE's 1992 Camaro RS: Fully Restored w/Custom Interior, 5.0L V8, T-tops, OEM Z28 Foglamps, Inst Cluster, & Spoiler, Custom Sound, Too many engine mods to list

Um....I always thought that if you had a serpentine belt then that was the ONLY belt you had on your engine.

Jan 2, 2011 | 11:48 AM

#12

advancedlogic

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From: Encino, CA

My Ride: 04 545i - Titanium Silver/Black, Sport pkg, Comfort Seats w/ Lumbar, Premium Sound, power rear sunshade, Adaptive Xenon Headlights, Steptronic, Park Distance Control, Fold down rear seats w/ski bag, Aux jack, 6-disk changer, puddle lamps... Engine: Custom Remus cat-back exhaust w/chrome square tips, K&N Air Filter, Charcoal Filter Removed, Sprint Booster :-), 50/50 mix of 91+100 Octane, EuroRev ECU Remap (coming soon lol), Dinan High-Flow Throttle Body (coming soon...maybe lol) Interior: Portable Sirius Stilletto 100 w/car kit, Garmin Nuvi 680 mounted below rear-view mirror, LCI-style I-drive knob, Dark Poplar Center Dashboard Trim. Exterior: E60 forum clings, 5% rear tint, ACS roof spoiler (painted black for distinct look against limo tint), ACS trunk spoiler, ACS add-on front spoiler and rear apron (awaiting installation), "18 Black Staggered BeBeS Style OER (emergency replacement for cracked sport 124 rims), black kidney grill, white accessory lighting (including license and trunk lamps), Angel-eye upgrade, AIB xenon-matched fog lamps, AIB V3's on order, red rear reflectors

Quote:

Originally Posted by pukka

Um....I always thought that if you had a serpentine belt then that was the ONLY belt you had on your engine.

I wish. The 545i has 2 belts off the crank pully - a 'standard' belt to run the AC compressor, and a serpentine that runs everything else. Fun lol.

Jan 21, 2011 | 07:11 AM

#13

Atlast

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From: South Carolina

Now Now boys -great advice from both of you.
I do have a similar problem. If I stop and turn the engine off for say 5 minutes and restart then I get temperature warnings etc. I stop the car, switch off and restart all well? I have asked my tech and he says that there are no error codes. When restarting the fan does not even come on immediately
My car has 123,000 miles on. I have not replaced the hoses as yet except the one above the radiator.
My only clame to fame is building 50 different engines and too Porsche 911 3.0lit

Aug 6, 2012 | 07:24 AM

#14

mikael

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From: Geneva, Switzerland

advancedlogic,

Did you solve this problem?

I am seeing the same behaviour and have replaced thermostat, water pump and temp sensor on the pump housing without any change to the overheating warnings. The car runs fine and temperature readings on the OBD are perfectly stable. I am at a loss.

Thanks,
Mikael

Aug 27, 2012 | 07:48 AM

#15

Atlast

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From: South Carolina

I haven't had this since the last post.

Aug 27, 2012 | 09:47 AM

#16

advancedlogic

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From: Encino, CA

Quote:

Originally Posted by mikael

Hey guys the problem remains. Sometimes it'll go in rapid succession, then quiet. Some days are quiet. I think it's a problem within the DME, or possible voltage destabilization. I am a few months in on a rebuilt alternator, but I am going to bite the bullet on a brand new unit. Thermostat, water pump, thermal sensors, overflow tank, hoses, etc have all been replaced at one time or another. I'm going to resistance-check my battery cable and connections once time permits. I've had an MPM and IBS replacement in the past as well. Years of this warning, and 50k+ miles additional miles since the first time it popped up, I am fairly confident its a BS warning in my case lol. Still, the worst part is the system will turn off the AC when the warning pops up, ostensibly to reduce engine loads (and reduce temps in real emergencies). In my case, it just annoys the hell outta me with warming air for a moment.