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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Blown Headgasket



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      02-03-2016, 08:56 PM   #1
sloweste9x
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Blown Headgasket

Oil in coolant, coolant in the motor, could be a blown headgasket, my mechanic is still trying to diagnose it by pressuring the coolant system. I'm hoping its the ofhg as it's really bad and my alternator is caked in oil, and the only place that could leak onto the alternator is the ofhg because it's above it, but needless to say, if it's a 33 hour job, am I better off just swapping the motor? My mechanic said it would be cheaper and easier.
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      02-03-2016, 09:07 PM   #2
theweebabySeamus
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33 hrs for a headgasket? I have a hard time believing it's that long, or even close.

There's coolant in the combustion chambers? Or in the coolant passages that it's supposed to be in?
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      02-03-2016, 09:21 PM   #3
sloweste9x
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Originally Posted by theweebabySeamus View Post
33 hrs for a headgasket? I have a hard time believing it's that long, or even close.

There's coolant in the combustion chambers? Or in the coolant passages that it's supposed to be in?
There's coolant in the combustion chambers and the coolant reservoir is full of oil. As for the timing, it's ridiculous but not inaccurate, would be easier to swap then do the headgasket.
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      02-03-2016, 10:01 PM   #4
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33hrs... No way in hell and I'm a dealer tech. 20 at the most.

First of you can easily pull that head in the car, have done it numerous times. Even dropping the motor and pulling the head wouldn't be 30+

But I would be worried about the length of time that motor was operating with coolant in the sump. Not good at all for bearings.
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      02-03-2016, 10:02 PM   #5
sloweste9x
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Originally Posted by Abax335 View Post
33hrs... No way in hell and I'm a dealer tech. 20 at the most.

First of you can easily pull that head in the car, have done it numerous times. Even dropping the motor and pulling the head wouldn't be 30+

But I would be worried about the length of time that motor was operating with coolant in the sump. Not good at all for bearings.


Thanks man, appreciate the advice. Anything else I should know? If it's the gasket would your vote be replacing it?
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      02-03-2016, 10:16 PM   #6
Abax335
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if you are paying 33 hrs and a new motor will run you at least 6-7k minimum in parts. So you are about 10k right of the bat not including gaskets and fluid among with other necessities.

But you will have to take into consideration depending on how quickly you caught this, the damage could already be done to the internals and do you want to risk dropping 2k for the head gasket and potentially have a rod knock and having to replace or rebuild the motor. ( rebuilt an n54t a few weeks ago in my shop for knocking)

I don't want to sway you in a certain direction because on my case there would be no charge in labor, so if be doing a head gasket and alot of fluid flushes maybe even some new lines and reservoirs to clean out the systems would be my choice.
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      02-03-2016, 10:37 PM   #7
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Its like 15hrs to remove and replace a motor. Maybe they added in a bunch of nonsense like "Clean out the reservoir and flush coolant system" and anything along those lines to ensure that there aren't any fluids mixing when done, but man, 33hrs? Slow ass techs.

If this were to be my issue, I'd just replace the motor with one that has decently low miles on it. Saves a whole lot of time and headaches. Never know what you'll end up finding. In case anything else went wrong during the event.
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