coolant leak?

Rabe · 08-10-2012, 09:12 PM

i am suspecting a leak because dipstick is reading low but no low coolant light. also when i put some more coolant in the next few days it will go back to reading low (dipstick) but i do not see any coolant on the ground or leakage anywhere around the car. is this a normal thing to lose a bit of coolant during the summer? also the amount of coolant that i add is a very small amount about a 3/4 of a cup.

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e46_TiAG · 08-10-2012, 09:13 PM

Maybe your coolant tank cracked. That happened to me, and the thermostat was toast. But then again, my driveway was flooded with coolant :O

Rabe · 08-10-2012, 09:15 PM

yea i see no sign of coolant on the floor, Idk maybe i'm its fine but i just want to be safe.

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jfoj · 08-10-2012, 09:58 PM

Check the sensor in the lower radiator hose, the O-rings leak all the time.

If there is any moisture under the switch onto of the belly pan, your O-ring needs to be replaced.

See my signature below for the O-ring part number.

08-10-2012, 09:12 PM	#1
Rabe Registered User Join Date: Mar 2012 Location: Jersey city nj Posts: 140 My Ride: 330ci 2001 View My Garage	coolant leak? i am suspecting a leak because dipstick is reading low but no low coolant light. also when i put some more coolant in the next few days it will go back to reading low (dipstick) but i do not see any coolant on the ground or leakage anywhere around the car. is this a normal thing to lose a bit of coolant during the summer? also the amount of coolant that i add is a very small amount about a 3/4 of a cup. Sent from my SGH-T989 using Bimmer App

08-10-2012, 09:58 PM	#4
jfoj Registered User Join Date: Nov 2009 Location: Fairfax, VA USA Posts: 5,183 My Ride: '06 330CiC, '03 M5 View My Garage	Check the sensor in the lower radiator hose, the O-rings leak all the time. If there is any moisture under the switch onto of the belly pan, your O-ring needs to be replaced. See my signature below for the O-ring part number. __________________ Solve your misfires, lean codes, rough idle - http://forum.e46fanatics.com/showthread.php?t=897616 Fuel pump failures - http://forum.e46fanatics.com/showthread.php?t=929501 Temp Info - http://forum.e46fanatics.com/showthread.php?t=964491 Hidden OBC Menu - Check Voltage, Temps, Fuel Level - http://forum.e46fanatics.com/showthread.php?t=239619 E46/E39 GM5 Door Lock Info - www.bmwgm5.com Lower hose fan switch O-ring - BMW #13621743299

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08-10-2012, 09:13 PM	#2
e46_TiAG Registered User Join Date: Jul 2012 Location: CT Posts: 18 My Ride: 2000 328ci View My Garage	Maybe your coolant tank cracked. That happened to me, and the thermostat was toast. But then again, my driveway was flooded with coolant :O

08-10-2012, 09:15 PM	#3
Rabe Registered User Join Date: Mar 2012 Location: Jersey city nj Posts: 140 My Ride: 330ci 2001 View My Garage	yea i see no sign of coolant on the floor, Idk maybe i'm its fine but i just want to be safe. Sent from my SGH-T989 using Bimmer App