[Crosshairs]

So I bought a used 2008 335i Sedan. I bought it with 69k miles. I bought it with an oil leak. After a month of having it. I Took it to some guys to fix it. They told me it was the oil filter gasket housing. They fixed it by replacing the seal in between the two halves. Not sure. But as I was driving home, I got a low coolant light. At this point I am like flipping out because I had already been to the mechanic 3 times for the oil leak and now my coolant is low. So I topped off my coolant reservoir thinking everything was gonna be smooth sailing from there. Drove to the bank and on my way back, the low coolant light came on again. My heart dropped. I let the engine cool at home and I checked the reservoir. The thing was completely empty. I could see the bottom. I topped off the thing and it was completely empty from just a drive to the bank. I checked the ground for any signs of leaks but I don't see any. It only leaks when I run the car. I cannot find the source of the leak. I was thinking maybe the guys that fixed my oil filter gasket housing did something to a coolant line or something. I don't know for sure. So if you guys could give me some tips on where to check for a leak it would help. Thanks.

[e92_enthusiast_1]

Its probably pooling on your underliner tray. Maybe take it off and check for leaks after?

[Crosshairs]

Originally Posted by e92_enthusiast_1

Its probably pooling on your underliner tray. Maybe take it off and check for leaks after?

I'd try that if I had an hydraulic lift in my backyard lol

[335NJ]

Originally Posted by Crosshairs

I'd try that if I had an hydraulic lift in my backyard lol

Or socket wrenches.

Ramps, jack & jack stands, even on flat ground, you can reach under and remove the bolts holding the pan on.

[Dark_Knight_335]

You have a similar problem to what I had a couple of months back.

The dealer tells me there's some sort of a relief valve and we suspect the previous dealer overfilled the coolant during the very cold weather we've had, and when it got warm it burped up a few times.

[924er]

dude take that shit to some bmw mechanic next time

[ctuna]

Look in the DIY section here or Google
N54 oil gasket change.
They are suppose to drain and refresh the coolant
and oil . Then they are suppose to run the purge procedure
when refilling the coolant.
There are coolant passageways going through the filter area
if they botched the job on the gasket you could have coolant mixing
with oil.

[335NJ]

Who are "some guys"? Friends? Or a reputable shop?

Because it sounds like they may have made things worse.

[GB-335xiCoupe]

Originally Posted by ctuna

Look in the DIY section here or Google
N54 oil gasket change.
They are suppose to drain and refresh the coolant
and oil . Then they are suppose to run the purge procedure
when refilling the coolant.
There are coolant passageways going through the filter area
if they botched the job on the gasket you could have coolant mixing
with oil.

^ This.

[Crosshairs]

Turns out, my water pump went bad. It was leaking coolant like a damn kitchen sink.

[e92_enthusiast_1]

Dang sucks. Any codes that woulda warned you? Either way thanks for following up appreciate it.

Originally Posted by Crosshairs

Turns out, my water pump went bad. It was leaking coolant like a damn kitchen sink.

[iturbo_bmw]

something similar happened to me but it was a hose connecting to the oil filter. on the bottom. the hose connection was weak and it leaking coolant down. i had to replace that hose

[Blackhawk36]

Originally Posted by e92_enthusiast_1

Dang sucks. Any codes that woulda warned you? Either way thanks for following up appreciate it.

Leaks won't throw a code. Only electrical issues will.