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Old 10-21-2014, 02:19 AM   #1
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E46 318i Sump really hot

Is it normal for the sump to get really hot, boiling in fact?......I am in the process of doing a sump gasket repair and during the oil flushing operation I noticed that when undoing the sump drain plug the oil was almost boiling and the sump was very hot.
Should the oil be this hot or not? I am wondering if I have some sort of oil overheating problem.
When undoing the sump gasket bolts they were very tight , just getting half of them out so far I have broke 2 ratchet spanners and have one striped bolt hole , which will require re-tapping.
Has anyone had similar problems? Is there something I should check out while the sump is off…..if so please advise
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Old 10-21-2014, 06:03 AM   #2
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Oil gets very hot from running through your engine. And, try using a breaker bar for loosening bolts. Use a long-handled one and go slowly...I have a section of pipe to add length to the handles of things, might help (might not).

Also, just saying, many times here the oil pan appears to be leaking, but it's just oil migrating down from above...just hope you've eliminated those possible sources.

Anyway, our engines run, overall, at the boiling point of water. If your sump is ever cold after a long trip, then you should worry!

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Old 10-21-2014, 02:17 PM   #3
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Thanks for that info dmax, sets my mind at rest.....the sump is off now, but found inside of it some white plastic bits, this has me stumped as I can't see any plastic parts in the sump at all.

I have to confess not being a mechanic and this being my first BMW I did not know what a breaker bar was.......2 broken ratchets later I do now though, thanks to your advice.

P.S. .....Yes!..indeed I checked out and fixed all the leaks from above....hope this sump gasket is the last of the leaks, what a PITA this sump gasket is to work on, never had a car that needed the sub-frame removed to do a sump gasket before.

Last edited by uncleruin; 10-21-2014 at 02:24 PM.
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