[19jdog]

Spent 5 hours installing water pump, thermostat, oil change. Just to start the car and get a steady stream of blue coolant leaking. Cant really tell if the connections are bad because it spewing coolant everywhere. I did check connections before i started the engine. Is the water pump DOA? I did get it from FCP...

https://youtube.com/shorts/fK0Ey9Huxzo?feature=share

[19jdog]

Sorry for the huge pics!

[335i54n]

with that much oil residue, more likely the U shape or any other oil swollen hose failed at the clamp.

[19jdog]

Originally Posted by 335i54n

with that much oil residue, more likely the U shape or any other oil swollen hose failed at the clamp.

forgot to mention that the U pipe is brand new. All other hoses looked sufficient. On the plastic connections i put a lil bit of grease before i connected it again. I forgot to clean that part of the engine before installing the waterpump and thermostat, it is hard to see and i pulled the fan to take the pic/video.

[335i54n]

hard to tell, to me look like a leak running down onto the pump, if you did the tstat-did u also do the hose

[SchonE91]

The leak is coming from the high side of the pump. Assuming all of the quick connections we’re fully pushed in, the clips pushed down, and the connectors pulled to make sure the clips were locked in place, that leaves the pump discharge connection as the most likely culprit. I would check the hose clamp to see if it’s evenly aligned and centered, and tight.

When I replaced the pump, I chose not to replace the short hose on the pump discharge even though the end was slightly oil swollen. Since the BMW hose clamps are somewhat narrow, I doubled up on the clamps at this connection to make sure that the hose was sealing against all of the barbs on the pump.

[19jdog]

Update

The leak was coming from the mickey mouse seal. The seal had completely flattened out and was leaking. The leak dripped down to on top of the water pump and to the floor. The leak made the water pump the culprit. Since i had only been working underneath the car and did not scan the top of the motor for leaks until after installing the pump for a second time. So i installed the pump/thermostat right the 1st time...

Sigh

[SchonE91]

You’re referring to the seal at the oil filter housing hose connection? If so, inspect the condition of the plastic and consider replacing the hose if it’s degraded or brittle. The o-ring is only as good as the condition of the hose fitting.

[19jdog]

Originally Posted by SchonE91

You’re referring to the seal at the oil filter housing hose connection? If so, inspect the condition of the plastic and consider replacing the hose if it’s degraded or brittle. The o-ring is only as good as the condition of the hose fitting.

Yep

I bought one on ebay about a year ago. You get what you pay for because the o ring flattened out. I bought URO 11537541992PRM from the local Oreilly store. I payed 40 bucks for it. Not bad I guess. It comes with the metal flange which i removed and added to my car. Ill keep the hose for maybe the future.

Problem solved.

Thanks for your help! i doubled the clamp like you said on the high side connection.