Electric water/coolant pump failure

[Gnahp]

my wife's car has electric water pump and electronic controlled thermostat

when I was parking the car in a mall 10km away from home recently, the radiator fan suddenly kicked into high speed, a few seconds later, these dreaded red messages popped on both screens, no check engine light, my OBD scanner was at home so I didn't scan the car on the spot

 

 

I popped the bonnet, expansion tank level was good, no visible coolant leakage trace around engine bay and sump guard, no evaporated coolant scent, engine bay heat seems normal...

I let the car cool down for 3 hours, it started and run normally, in less than 400m, from B2 of the car park to the street level, the coolant temperature shot through the roof and the engine power was limited, so I stopped the car immediately at the road side and called a tow truck to tow it to the workshop

while waiting for the tow truck, I felt both the radiator and expansion tank with my hand, radiator was luke warm but the expansion tank was too hot to touch

I left a note on the dashboard for the workshop on the symptoms and my suspect of electric water pump and/or thermostat failure

they scanned the car and found an error code on seized water pump, strangely it didn't pop the fuse, they replaced both the EWP and thermostat, finger crossed

car is 2 years 2 months old, 82,000km 

it caught me off guard, before it failed, there was zero warning

- zero leakage
- pump was silent
- no fuse was popped
- no error code
- zero warning message

it worked until the last second and kaboom and I have only a couples of minute to react, imagine cruising on busy highway

the combo looks like a giant frankenstein artificial heart, the plastic part is the thermostat and the cast alloy part is the pump

 

now I missed the good old KISS (keep it simple stupid) mechanical driven pump and thermostat 🙄

 

 

[Soya]

EQ Charge is EV?

[Gnahp]

On 1/23/2024 at 2:08 PM, Soya said:

EQ Charge is EV?

48V mild hybrid 

[Ct3833]

On 1/23/2024 at 2:04 PM, Gnahp said:

my wife's car has electric water pump and electronic controlled thermostat

when I was parking the car in a mall 10km away from home recently, the radiator fan suddenly kicked into high speed, a few seconds later, these dreaded red messages popped on both screens, no check engine light, my OBD scanner was at home so I didn't scan the car on the spot

 

 

I popped the bonnet, expansion tank level was good, no visible coolant leakage trace around engine bay and sump guard, no evaporated coolant scent, engine bay heat seems normal...

I let the car cool down for 3 hours, it started and run normally, in less than 400m, from B2 of the car park to the street level, the coolant temperature shot through the roof and the engine power was limited, so I stopped the car immediately at the road side and called a tow truck to tow it to the workshop

while waiting for the tow truck, I felt both the radiator and expansion tank with my hand, radiator was luke warm but the expansion tank was too hot to touch

I left a note on the dashboard for the workshop on the symptoms and my suspect of electric water pump and/or thermostat failure

they scanned the car and found an error code on seized water pump, strangely it didn't pop the fuse, they replaced both the EWP and thermostat, finger crossed

car is 2 years 2 months old, 82,000km 

it caught me off guard, before it failed, there was zero warning

- zero leakage
- pump was silent
- no fuse was popped
- no error code
- zero warning message

it worked until the last second and kaboom and I have only a couples of minute to react, imagine cruising on busy highway

the combo looks like a giant frankenstein artificial heart, the plastic part is the thermostat and the cast alloy part is the pump

 

now I missed the good old KISS (keep it simple stupid) mechanical driven pump and thermostat 🙄

 

 

Wah 2 years 82,000km, your wife drive nercedes to eat wind all day long ? 😅 you see wrongly boh.

[Gnahp]

On 1/23/2024 at 2:23 PM, Ct3833 said:

Wah 2 years 82,000km, your wife drive nercedes to eat wind all day long ? 😅 you see wrongly boh.

shiok right 😁

this is the mileage today at 2:25pm

 

[Mkl22]

wah 2years 82k km. almost double the typical. i would think the electronics kaput. the mechanical pump side should still be ok. but it is like this nowadays. with conti all the more prone to electronics failures.

 

when you sell it will be posted by the dealers as low mileage, driven by housewife. only 12k km/yr! 😁

Edited January 23, 2024 by Mkl22

[Gnahp]

On 1/23/2024 at 2:32 PM, Mkl22 said:

wah 2years 82k km. almost double the typical. i would think the electronics kaput. the mechanical pump side should still be ok. but it is like this nowadays. with conti all the more prone to electronics failures.

 

when you sell it will be posted by the dealers as low mileage, driven by housewife. only 12k km/yr! 😁

owner's second car, driven by housewife, low mileage, best unit in town 😁

I checked the failed pump at the workshop, the water pump impeller was seized solid

 

unlike the good old belt driven mechanical pump that gives plenty of warnings before failure

this electric water pump fails in the fashion like a light bulb, working working working working - pop! fail with no warning

now I am considering to replace the pump/thermostat at a regular interval as preventive maintenance 

[Jamesc]

I always replace timing belt at 60 - 80k and do the water pump at the same time cos already remove so many parts.

A water pump should last 100 - 150k but I guess lowest bidder means 80k is a good time to change.

[Mkl22]

On 1/23/2024 at 2:43 PM, Gnahp said:

owner's second car, driven by housewife, low mileage, best unit in town 😁

I checked the failed pump at the workshop, the water pump impeller was seized solid

 

unlike the good old belt driven mechanical pump that gives plenty of warnings before failure

this electric water pump fails in the fashion like a light bulb, working working working working - pop! fail with no warning

now I am considering to replace the pump/thermostat at a regular interval as preventive maintenance 

$50? 🤣

[kobayashiGT]

Your diagnosis is better than some workshop. 

[Gnahp]

On 1/23/2024 at 3:20 PM, kobayashiGT said:

Your diagnosis is better than some workshop. 

久病成医 😭

Literally: “Prolonged illness makes a doctor of a patient.”

[kobayashiGT]

On 1/23/2024 at 3:38 PM, Gnahp said:

久病成医 😭

Literally: “Prolonged illness makes a doctor of a patient.”

My car recently also has ignition problem, one of the fuse my previous mechanic sam pong drop. hahaha. I diy myself. 

Do I consider myself as Doc? 

I wanna be doc strange. hahahahaha. 

[Inlinefour]

On 1/23/2024 at 3:54 PM, kobayashiGT said:

My car recently also has ignition problem, one of the fuse my previous mechanic sam pong drop. hahaha. I diy myself. 

Do I consider myself as Doc? 

I wanna be doc strange. hahahahaha. 

you are surgeon level

ownself ops ownself

pap style 🙈🙉🙊

[Inlinefour]

On 1/23/2024 at 3:38 PM, Gnahp said:

久病成医 😭

Literally: “Prolonged illness makes a doctor of a patient.”

no horse run

me only eye and mouth open big big

 

dun noe what's happening 🙊🙉🙈

[Inlinefour]

On 1/23/2024 at 2:23 PM, Ct3833 said:

Wah 2 years 82,000km, your wife drive nercedes to eat wind all day long ? 😅 you see wrongly boh.

Shocking

mine 6 years 34k only 🙈🙉🙊

[Inlinefour]

On 1/23/2024 at 2:32 PM, Mkl22 said:

wah 2years 82k km. almost double the typical. i would think the electronics kaput. the mechanical pump side should still be ok. but it is like this nowadays. with conti all the more prone to electronics failures.

 

when you sell it will be posted by the dealers as low mileage, driven by housewife. only 12k km/yr! 😁

James will post

 

one careful lady driver

 

Only go buy groceries with helpers

 

Max mileage per year 1k 🙊🙉🙈

[Ct3833]

On 1/23/2024 at 7:12 PM, Inlinefour said:

Shocking

mine 6 years 34k only 🙈🙉🙊

More shocking😃

[ER-3682]

@GnahpTime to change Car, @RadXsaid one,82,000Km...Problems will come in,call 62981818...for the latest Model.