Enforcer
I was just pulling out of the touch free wash on Saturday, and through those high speed driers, and my coolant light tripped on. So I pulled over to the side, shut the engine off, and checked the level and everything was fine. Couldn't really see if there were any leaks because the undercarriage was still wet. Got in and started the engine, no light on. Drove 10 miles home, check fluid level again (ok) and check out underneath, bone dry.
Suggestions?
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BMW Perf. Gloss Kidneys | UUC DSSR | B&M SSK | 35% tint | AL Headlight Retrofit with ZKW Lenses | Tri-Color Coby Wheel | Aux Input
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Keep an eye on it.
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Call Me Dane l 2/2004 330i ZHP l 18x8 ET45 BBS CK's wrapped with Michelin Pilot Sport AS3+ @ 245-40-18 l KW V1 Coilovers in front l KW V1 springs w/ Bilstein B8 dampeners in rear l BMW Performance Rotors l UUC StrutBarbarian l Racing Dynamics Rear Strut Bar l Jim Conforti Shark Injector l Light Birch Interior Trim l Bimmian Celly Mount l M3 Trunk Mat l l e90 Performance E-Brake & Shift Knob l M3 Tri-Stitched Boots l AL Headlight Retrofit with ZKW Lenses l CobyWheel Wrap w/M3 Stitching l LCM sw 4.5 triple blink and rear fogs l Maple Interior Trim
Messaggero
The sensor could be faulty. Best bet is to check it every couple of days. Once a week is best.
Also, be careful checking coolant on a hot engine!
Messaggero
I agree if the light is coming on I would check it daily for a week or 2... if the fluid level never changes I would start thinking sensor
Mods: Smoked corners, smoked side markers, smoked tails, 35% tint, CF kidney grills, debadged, angel eyes, 3000k HID Fogs, OBX exhaust, Sharked, solo werks S1 coilovers, front and rear strut brace, AUX cable
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Messaggero
Sudden drops in outside temp can trigger the light even if the levels are ok.
or even sudden spikes: High heat drier --> plastic expands --> (tank bigger) --> level drops a bit --> light?
2005 AW ZHP Coupe. CW, Alcantara, Leather st. wheel, HK, Xenons, Step, Dinan chip & air box, USASpec, Sprint Booster
Enforcer
Got it. Thanks fellas.
BMW Perf. Gloss Kidneys | UUC DSSR | B&M SSK | 35% tint | AL Headlight Retrofit with ZKW Lenses | Tri-Color Coby Wheel | Aux Input
Enforcer
Okay... now after a couple weeks of analysis, here's what's going on: I start the car in the morning, light pops on after driving for about 5 minutes, stays on for a minute or two, then shuts off... I cruise 40 miles down the highway @ 80mph, get off at the exit for work (or home), and as soon as I get back down to stop and go traffic, light pops back on for a minute or so, then shuts back off. Very strange. Does it every day now. Level is fine.
? ? ?
BMW Perf. Gloss Kidneys | UUC DSSR | B&M SSK | 35% tint | AL Headlight Retrofit with ZKW Lenses | Tri-Color Coby Wheel | Aux Input
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I bet you have a small crack in your expansion tank. These indications are nearly identical to mine. I believe the crack would swell, due to temp....or pressure in the tank......then close back up. Super slow leak.....never noticed any "leak" per se', then finally found it when I pre-emptively changed out the tank.
Have you completed a really good inspection of all the problem area's?
Call Me Dane l 2/2004 330i ZHP l 18x8 ET45 BBS CK's wrapped with Michelin Pilot Sport AS3+ @ 245-40-18 l KW V1 Coilovers in front l KW V1 springs w/ Bilstein B8 dampeners in rear l BMW Performance Rotors l UUC StrutBarbarian l Racing Dynamics Rear Strut Bar l Jim Conforti Shark Injector l Light Birch Interior Trim l Bimmian Celly Mount l M3 Trunk Mat l l e90 Performance E-Brake & Shift Knob l M3 Tri-Stitched Boots l AL Headlight Retrofit with ZKW Lenses l CobyWheel Wrap w/M3 Stitching l LCM sw 4.5 triple blink and rear fogs l Maple Interior Trim
I bet you had your heat on..
Amirite?
Messaggero
What does your ET float (level indicator) look like when the engine is completely cold?
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