Water Pump Coolant Sensor leaking

[Bmwfvr]

Originally Posted by Unicorn

A coolant leak from the weep hole wouldn't lead to that sensor.


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yes you are right. is the coolant leak from the weep hole visible without taking parts out of the way? should i be able to see a trace of coolant by simply looking at the front of the engine?

[Baby Unicorn Taco]

Originally Posted by Bmwfvr

yes you are right. is the coolant leak from the weep hole visible without taking parts out of the way? should i be able to see a trace of coolant by simply looking at the front of the engine?

Yes. Nothing has to be removed to see the weep hole. It is a hole about the size of a pencil. It is on the front of the engine block. It is kind of behind and to the left of the water pump. It does not always look like coolant drops. It can look just wet.


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[Bmwfvr]

Originally Posted by Unicorn

Yes. Nothing has to be removed to see the weep hole. It is a hole about the size of a pencil. It is on the front of the engine block. It is kind of behind and to the left of the water pump. It does not always look like coolant drops. It can look just wet.


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The traces of coolant definitely start at the bottom of the sensor and run down the water pump .. I will take a close up picture, hopefully I get a better view of the weep hole.

[Bmwfvr]

by the way, does coolant need to be drained to remove and re-install the sensor? I did it a couple of times without draining and it was fine, no coolant came out but the last time I did it lots of coolant gushed out and spilled everywhere!!

[Bmwfvr]

Originally Posted by Unicorn

Yes. Nothing has to be removed to see the weep hole. It is a hole about the size of a pencil. It is on the front of the engine block. It is kind of behind and to the left of the water pump. It does not always look like coolant drops. It can look just wet.


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Here is a shot of the sensor. I dont see any leaks from around or near the coolant pump!!

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[Baby Unicorn Taco]

Originally Posted by Bmwfvr

Here is a shot of the sensor. I dont see any leaks from around or near the coolant pump!!Attachment 75703

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That leak is from the sensor. With an o-ring instead of sealant it will stop it from leaking very easily. It's a small o-ring. Has to be buna-n or viton for the heat.


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[Bmwfvr]

Originally Posted by Unicorn

That leak is from the sensor. With an o-ring instead of sealant it will stop it from leaking very easily. It's a small o-ring. Has to be buna-n or viton for the heat.


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So replace the metal washer with an o ring?

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[Baby Unicorn Taco]

Originally Posted by Bmwfvr

So replace the metal washer with an o ring?

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o-ring here



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[Bmwfvr]

Originally Posted by Unicorn

o-ring here



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Thanks for the pic. What size is it? Also, Can i take the sensor out without draining the coolant?

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