Cant figure out this overheating problem

Nicky92 · 11-22-2015, 08:48 PM

2011 335i N55

I have 66k on it now.

Lately its been acting up and its almost winter here in NY and I need my heat lol

Ok so one day the engine running hot light came on, I pulled over and cooled down. Then continued to work, no warnings.

I checked my coolant tank it was low so I added some mix.

When I turn the heat on the fans come on FULL blast. and the car just doesnt act right

When I have the heat off, it runs much better...still maybe the gas pedal seems laggy but better than when the heat is on.

Today I tried to bleed the system maybe an air pocked from when I filled up the tank. I did the procedure to start the water pump to purge air. The fans were so loud I couldn't tell if the water pump was cycling.

After about 15 mins I started the car and took it for a drive, Same thing happens when I put the heat on.

I have narrowed it down to a sticky thermostat, water pump failure or maybe a coolant temp sensor issue.

No codes either.

Any input here would be great, Thanks!

Jody62 · 11-22-2015, 08:53 PM

Change the water pump and thermostat. Now. Don't even drive it any more unless you're going to the shop to have it changed.

hugus311 · 11-22-2015, 08:59 PM

dido that pump and thermostat swap

Nicky92 · 11-22-2015, 09:02 PM

Its been like this for a good 2 weeks now without an overheating message..which makes me think it's not the water pump

Jody62 · 11-22-2015, 09:12 PM

So far you're lucky that it's showing signs of failure. I would replace it now or look forward to paying for a tow in your near future. If you let it go thinking it's something else, you will not like the outcome. Take it from a guy who cooked an n52 years ago thinking I had a faulty sensor. It was a hefty $5K bill to fix it.

theweebabySeamus · 11-22-2015, 11:58 PM

Quote:

Originally Posted by Nicky92

Its been like this for a good 2 weeks now without an overheating message..which makes me think it's not the water pump

Well, it does sound exactly like a water pump/tstat issue, so I would swap ASAP.

bmg4 · 11-23-2015, 04:01 AM

If it's your water pump inpa will pick up codes. There is No cel for failing water pump. I had 3k less miles when my water pump took a dump.

Teufel_Hunden · 11-23-2015, 07:35 AM

2011 e92, just had the water pump fail a month ago at about 46k miles.

JETmn · 11-24-2015, 10:40 AM

Quote:

Originally Posted by Nicky92

Its been like this for a good 2 weeks now without an overheating message..which makes me think it's not the water pump

If you aren't getting heat, then the coolant is not being circulated. It is definitely the water pump.

weehe126 · 11-24-2015, 12:50 PM

Could also be a clogged heater core. Not sure if when the heat is off it bipasses the core.

JETmn · 11-25-2015, 09:37 AM

Quote:

Originally Posted by weehe126

Could also be a clogged heater core. Not sure if when the heat is off it bipasses the core.

That wouldn't cause the engine hot alarm he got earlier though. The water pump would do both. 99.9% chance it is the water pump.l

Nicky92 · 11-25-2015, 09:53 PM

So I just changed the water pump. Tried to change the thermostat but for some reason my OEM one didn't match the new one. That nipple on the back came out straight instead of an elbow. Weird!

Anyway the car runs better no fans, no engine lights, etc.

but this problem is still happening, When I turn the heat on the OIL TEMP goes down. What could that be?

thermostat? Since it wasn't changed?? I really don't understand that

weehe126 · 11-26-2015, 04:59 PM

Quote:

Originally Posted by Nicky92

So I just changed the water pump. Tried to change the thermostat but for some reason my OEM one didn't match the new one. That nipple on the back came out straight instead of an elbow. Weird!

Anyway the car runs better no fans, no engine lights, etc.

but this problem is still happening, When I turn the heat on the OIL TEMP goes down. What could that be?

thermostat? Since it wasn't changed?? I really don't understand that

Where did you get it from? there are 2 different part numbers. I was also conned into a kit from a member on here that had the wrong thermostat.

piker28 · 12-01-2015, 03:22 PM

My car was doing the same thing. Pull over and then it was fine. The only time it started to overheat was on long drives "over 1.5hrs" . Took it to the dealer and it was the water pump. Since they changed it I have not had the issue anymore.

11-22-2015, 08:48 PM	#1
Nicky92 Fastest 335 on Earth 39 Rep 426 Posts Drives: 2008 335i Join Date: Feb 2014 Location: Levittown, NY iTrader: (0)	Cant figure out this overheating problem 2011 335i N55 I have 66k on it now. Lately its been acting up and its almost winter here in NY and I need my heat lol Ok so one day the engine running hot light came on, I pulled over and cooled down. Then continued to work, no warnings. I checked my coolant tank it was low so I added some mix. When I turn the heat on the fans come on FULL blast. and the car just doesnt act right When I have the heat off, it runs much better...still maybe the gas pedal seems laggy but better than when the heat is on. Today I tried to bleed the system maybe an air pocked from when I filled up the tank. I did the procedure to start the water pump to purge air. The fans were so loud I couldn't tell if the water pump was cycling. After about 15 mins I started the car and took it for a drive, Same thing happens when I put the heat on. I have narrowed it down to a sticky thermostat, water pump failure or maybe a coolant temp sensor issue. No codes either. Any input here would be great, Thanks! __________________ E92 335i, 6MT- YouWish Single turbo, Precision 6466, Doc Race intake manifold w/port injection, Precision Raceworks coil packs and Stage 3 lpfp, 3.46 geared Mfactory LSD, VRSF 3.5" single exhaust, Toyo R888Rs, Spec Stage 3+ clutch, DSS axles, RTD shifter, Motiv, boost box and flex fuel, WOTBOX, MOTIV tuned...and much more
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11-22-2015, 08:53 PM	#2
Jody62 Private First Class 23 Rep 157 Posts Drives: 2011 335i sedan, e36 m3/4/5 Join Date: May 2014 Location: Charlottesville, VA iTrader: (2)	Change the water pump and thermostat. Now. Don't even drive it any more unless you're going to the shop to have it changed. __________________ 2011 e90 335i; JB4 with BT ConnectKit\|Active CP\|Active Signature Exhaust\|Injen CAI\|Active/Burger/Devil's Own custom Meth Kit\|Burger OCC\|Burger DP\|CF grilles\|OEM CF mirror covers\|JBSpeed splitters and M3 lip spoiler\|Umnitza ICE LED Angel eyes\|OEM Alpine HiFi audio upgrade\|BMW Performance shift knob/e-brake
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11-22-2015, 08:59 PM	#3
hugus311 Titanium silver + Sport + Premium 32 Rep 662 Posts Drives: 2006 330i (E90) Join Date: Nov 2009 Location: west covina 626 iTrader: (6)	dido that pump and thermostat swap
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11-22-2015, 09:02 PM	#4
Nicky92 Fastest 335 on Earth 39 Rep 426 Posts Drives: 2008 335i Join Date: Feb 2014 Location: Levittown, NY iTrader: (0)	Its been like this for a good 2 weeks now without an overheating message..which makes me think it's not the water pump __________________ E92 335i, 6MT- YouWish Single turbo, Precision 6466, Doc Race intake manifold w/port injection, Precision Raceworks coil packs and Stage 3 lpfp, 3.46 geared Mfactory LSD, VRSF 3.5" single exhaust, Toyo R888Rs, Spec Stage 3+ clutch, DSS axles, RTD shifter, Motiv, boost box and flex fuel, WOTBOX, MOTIV tuned...and much more
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11-22-2015, 09:12 PM	#5
Jody62 Private First Class 23 Rep 157 Posts Drives: 2011 335i sedan, e36 m3/4/5 Join Date: May 2014 Location: Charlottesville, VA iTrader: (2)	So far you're lucky that it's showing signs of failure. I would replace it now or look forward to paying for a tow in your near future. If you let it go thinking it's something else, you will not like the outcome. Take it from a guy who cooked an n52 years ago thinking I had a faulty sensor. It was a hefty $5K bill to fix it. __________________ 2011 e90 335i; JB4 with BT ConnectKit\|Active CP\|Active Signature Exhaust\|Injen CAI\|Active/Burger/Devil's Own custom Meth Kit\|Burger OCC\|Burger DP\|CF grilles\|OEM CF mirror covers\|JBSpeed splitters and M3 lip spoiler\|Umnitza ICE LED Angel eyes\|OEM Alpine HiFi audio upgrade\|BMW Performance shift knob/e-brake
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11-23-2015, 04:01 AM	#7
bmg4 Enlisted Member 1 Rep 35 Posts Drives: 2011 BMW 335i x drive Join Date: Apr 2015 Location: Lansing, Mi iTrader: (0)	If it's your water pump inpa will pick up codes. There is No cel for failing water pump. I had 3k less miles when my water pump took a dump.
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11-23-2015, 07:35 AM	#8
Teufel_Hunden Banned 8355 Rep 2,963 Posts Drives: 2013 M3 6MT LMB ZCP Join Date: Feb 2012 Location: Maryland iTrader: (3)	2011 e92, just had the water pump fail a month ago at about 46k miles.
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11-24-2015, 12:50 PM	#10
weehe126 Brigadier General 1161 Rep 3,189 Posts Drives: 2017 340i Join Date: Apr 2014 Location: San Antonio iTrader: (2)	Could also be a clogged heater core. Not sure if when the heat is off it bipasses the core.
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11-25-2015, 09:53 PM	#12
Nicky92 Fastest 335 on Earth 39 Rep 426 Posts Drives: 2008 335i Join Date: Feb 2014 Location: Levittown, NY iTrader: (0)	So I just changed the water pump. Tried to change the thermostat but for some reason my OEM one didn't match the new one. That nipple on the back came out straight instead of an elbow. Weird! Anyway the car runs better no fans, no engine lights, etc. but this problem is still happening, When I turn the heat on the OIL TEMP goes down. What could that be? thermostat? Since it wasn't changed?? I really don't understand that __________________ E92 335i, 6MT- YouWish Single turbo, Precision 6466, Doc Race intake manifold w/port injection, Precision Raceworks coil packs and Stage 3 lpfp, 3.46 geared Mfactory LSD, VRSF 3.5" single exhaust, Toyo R888Rs, Spec Stage 3+ clutch, DSS axles, RTD shifter, Motiv, boost box and flex fuel, WOTBOX, MOTIV tuned...and much more
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12-01-2015, 03:22 PM	#14
piker28 Private First Class 15 Rep 123 Posts Drives: bmw 335xi Join Date: Mar 2014 Location: new jersey iTrader: (2)	My car was doing the same thing. Pull over and then it was fine. The only time it started to overheat was on long drives "over 1.5hrs" . Took it to the dealer and it was the water pump. Since they changed it I have not had the issue anymore.
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