CODE: 377A Cooling System Deactivation Coolant pump due to block 2011 135i 70k miles

niceast · 07-01-2021, 08:23 PM

CAR:
2011 bmw 135i
71,000 miles

Weather:
110 degrees f

Problem:
Car pop warning code (extracted by MHD super license, wifi adapter)
377A Engine cooling system: Deactivation of Coolant pump due to blockage.

Detail:
Drove 3 hours on highway in 40degC (104degF) weather. Went to accelerate from 80mph to 50-70% throttle > heard faint pop [sounded like plastic]. No problem until 10 minutes later CIC displayed shutdown/stop vehicle Overheating warning.
Stopped for 20 minutes> oil temperature gauge on dash read 250 deg -/+ 10.
Drove another hour at 60 mph through -/+ 7 def slope mountains roads.
Parked for weekend.

two days later, Drove back 4 hours, no problem up till the last miles from home: Overheating warning came up again. pulled over shut car down for 5 minutes and restarted: made it back.
Parked for 1 day.

Drove for a week, less than 30 miles round-trip no problems.

Last time drove, 24 miles out of 25 miles round trip, Engine warning popped up overheating due to blockage.

What I am looking for a reviews and DIY for water pump replacement. Leave a message let me know what you find.

niceast · 05-26-2022, 12:43 AM

my resolution.

replaced water pump + thermostat + uhose.
Add burger tuning motorsport sport oil cooler valve as bonus.

07-01-2021, 08:23 PM	#1
niceast Private First Class 45 Rep 142 Posts Drives: e82 Join Date: May 2017 Location: Seattle iTrader: (0)	CODE: 377A Cooling System Deactivation Coolant pump due to block 2011 135i 70k miles CAR: 2011 bmw 135i 71,000 miles Weather: 110 degrees f Problem: Car pop warning code (extracted by MHD super license, wifi adapter) 377A Engine cooling system: Deactivation of Coolant pump due to blockage. Detail: Drove 3 hours on highway in 40degC (104degF) weather. Went to accelerate from 80mph to 50-70% throttle > heard faint pop [sounded like plastic]. No problem until 10 minutes later CIC displayed shutdown/stop vehicle Overheating warning. Stopped for 20 minutes> oil temperature gauge on dash read 250 deg -/+ 10. Drove another hour at 60 mph through -/+ 7 def slope mountains roads. Parked for weekend. two days later, Drove back 4 hours, no problem up till the last miles from home: Overheating warning came up again. pulled over shut car down for 5 minutes and restarted: made it back. Parked for 1 day. Drove for a week, less than 30 miles round-trip no problems. Last time drove, 24 miles out of 25 miles round trip, Engine warning popped up overheating due to blockage. What I am looking for a reviews and DIY for water pump replacement. Leave a message let me know what you find. Last edited by niceast; 07-02-2021 at 10:57 AM..
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05-26-2022, 12:43 AM	#2
niceast Private First Class 45 Rep 142 Posts Drives: e82 Join Date: May 2017 Location: Seattle iTrader: (0)	my resolution. replaced water pump + thermostat + uhose. Add burger tuning motorsport sport oil cooler valve as bonus.
	Appreciate 0 Quote