N57 Oil Pump Failure/WTB

Damogs · 07-18-2018, 05:31 AM

Hi guys, I was going for a drive in my 3 day old (managed to put about 300km on it), 69,000km E90 LCI 330D with quite good BMW dealership service history, when suddenly idrive goes crazy at me saying low oil pressure stop engine immediately. Along with this I hear a new jingling/grinding noise. I also lost brake assist (i.e, vacuum).

My first thought was timing chains, but the engine still ran fine, just making this noise and warnings of low oil pressure. I got the car towed to a mechanic, which after pulling the gearbox and dropping the sump saw a loose oil pump chain. After some fishing we managed to pull the oil pump drive gear out of the sump. I thought the oil pump bolt had loosened out somehow. But after dropping the sump it became clear that the bolt had snapped at the head.

Some further thinking lead us to think that there isn't that much force on the oil pump for that to happen. After getting the snapped part of the bolt out, quite easily, we realised that the oil pump wasn't actually spinning.

After pulling the pump apart, it became obvious that the intermediate (or floater or non-directly driven) gear in the pump had been grinding against the housing verrrry slightly, forcing it to seize in position. Has anyone experienced anything like this? Is this a common issue? Should a 69,XXXkm old engine that has been serviced well and very clean inside do this?

Also, does anyone in any part of the world have a reasonably priced oil pump for a n57d30 for sale?

Thanks

tryingtobebest · 07-18-2018, 04:00 PM

In most of the oil pumps gears touching their walls...
Now, i hate to say this but, even if you find oil pump there might be a chance of spinning a big end (rod bearing) since you run it with no oil pressure!

Post some pics, and on the term of should engine do this - no, most of us never had to deal with things internally

Andy198712 · 07-19-2018, 09:42 AM

not heard this one before from an N57 engine, sounds really un lucky

wonder if its worth asking BMW for any help? as thats not many miles!

sukutash · 07-19-2018, 10:17 AM

I believe Andrew of AARodriguez/ tunemyeuro.com, had an oil pump failure.

http://www.tunemyeuro.com/335d-low-o...-pump-failure/

07-18-2018, 05:31 AM	#1
Damogs New Member 6 Rep 5 Posts Drives: '05 118i Join Date: Oct 2016 Location: NSW, Australia iTrader: (0)	N57 Oil Pump Failure/WTB Hi guys, I was going for a drive in my 3 day old (managed to put about 300km on it), 69,000km E90 LCI 330D with quite good BMW dealership service history, when suddenly idrive goes crazy at me saying low oil pressure stop engine immediately. Along with this I hear a new jingling/grinding noise. I also lost brake assist (i.e, vacuum). My first thought was timing chains, but the engine still ran fine, just making this noise and warnings of low oil pressure. I got the car towed to a mechanic, which after pulling the gearbox and dropping the sump saw a loose oil pump chain. After some fishing we managed to pull the oil pump drive gear out of the sump. I thought the oil pump bolt had loosened out somehow. But after dropping the sump it became clear that the bolt had snapped at the head. Some further thinking lead us to think that there isn't that much force on the oil pump for that to happen. After getting the snapped part of the bolt out, quite easily, we realised that the oil pump wasn't actually spinning. After pulling the pump apart, it became obvious that the intermediate (or floater or non-directly driven) gear in the pump had been grinding against the housing verrrry slightly, forcing it to seize in position. Has anyone experienced anything like this? Is this a common issue? Should a 69,XXXkm old engine that has been serviced well and very clean inside do this? Also, does anyone in any part of the world have a reasonably priced oil pump for a n57d30 for sale? Thanks
	Appreciate 0 Tweet Quote

07-18-2018, 04:00 PM	#2
tryingtobebest First Lieutenant 87 Rep 369 Posts Drives: E90 Join Date: Oct 2012 Location: Calgary, Ab iTrader: (3)	In most of the oil pumps gears touching their walls... Now, i hate to say this but, even if you find oil pump there might be a chance of spinning a big end (rod bearing) since you run it with no oil pressure! Post some pics, and on the term of should engine do this - no, most of us never had to deal with things internally
	Appreciate 0 Quote

07-19-2018, 09:42 AM	#3
Andy198712 Major 145 Rep 1,006 Posts Drives: 2010 E91 325d Join Date: Mar 2017 Location: Cornwall iTrader: (0)	not heard this one before from an N57 engine, sounds really un lucky wonder if its worth asking BMW for any help? as thats not many miles!
	Appreciate 0 Quote

07-19-2018, 10:17 AM	#4
sukutash First Lieutenant 66 Rep 364 Posts Drives: 2011 335d, 2020 M2C Join Date: Jan 2011 Location: Ft Worth iTrader: (7) Garage List 2020 BMW M2 KOMP [0.00] 2014 BMW 535i [0.00] 2012 MERC E63 AMG W ... [0.00] 2011 BMW 335d [0.00]	I believe Andrew of AARodriguez/ tunemyeuro.com, had an oil pump failure. http://www.tunemyeuro.com/335d-low-o...-pump-failure/ Last edited by sukutash; 07-19-2018 at 10:18 AM.. Reason: Added web address
	Appreciate 0 Quote