[yamaharecker]

What do you guys think this is? My car has 72k and it leaks about 1/4 gallon every 2 days. It's puddles on the right side of the block right underneath the water pump. The top of the hose has all the dried up coolant (pictures ) This is the hose right underneath the turbo piping but above the waterpump. I think the water pump is leaking or spraying some coolant upwards, but could the leak be from the block itself? The dried up coolant is right next to/ underneath the headgasket area.

[mojobmw_e90]

Have you turned the car on and let it idle while under it to see if it's leaking?water pump has 3 hoses that connect to it.try tightening the hose clamps.might be leaking at the t stat as it's under the turbos,the water pump is more towards the middle of the car

[Spacecpe]

I just replaced mine at 70k miles. had the same problem, the water pumpe started leaking to the point where i had to add coolant everyday. and it gave out after a couple weeks after it started. if i were you i'd just buy one and get it ready when the other stops working.

[yamaharecker]

Originally Posted by E90 M335i

I just replaced mine at 70k miles. had the same problem, the water pumpe started leaking to the point where i had to add coolant everyday. and it gave out after a couple weeks after it started. if i were you i'd just buy one and get it ready when the other stops working.

Did you replace the hoses as well? Also who did you get yours from? I know ECS has a kit that supplies all new ones.

[yamaharecker]

Originally Posted by mojobmw_e90

Have you turned the car on and let it idle while under it to see if it's leaking?water pump has 3 hoses that connect to it.try tightening the hose clamps.might be leaking at the t stat as it's under the turbos,the water pump is more towards the middle of the car

I've tried that already. Nothing leaks or bubbles anywhere when the car is on, but after a cool/cold night it has a puddle underneath the car. Contraction of the hoses or plastic?

[Jeef]

Originally Posted by yamaharecker

I've tried that already. Nothing leaks or bubbles anywhere when the car is on, but after a cool/cold night it has a puddle underneath the car. Contraction of the hoses or plastic?

How about the expansion tank itself?

[Spacecpe]

Originally Posted by yamaharecker

Did you replace the hoses as well? Also who did you get yours from? I know ECS has a kit that supplies all new ones.

No i didn't get the hoses. I only got the kit with the water pump, bolts and thermostat from Tunermotorsport. you can get the whole kit with the U shaped hose for about $570 or something like that.

[yamaharecker]

Here are some more pics taken 24 hours apart. It looks like all the coolant is dried right above the front turbo inlet tubing. Could the leak be from somewhere else off the block?

[mojobmw_e90]

the turbos are water and oi cooled so check the coolant line that goes to the turbos.