MINI2

Router · Sep 19th, 2006, 09:30 PM

Anybody had a problem with the thread wearing on the sump bung after 80K miles?

I have one of the first Cooper's and it was serviced yesterday for the 6th time and I get a call from the garage to say that the thread is broken due to wear!

The question is how can a thread wear when it it has been only undone 6 times? If its due to vibrations then surely its a manufacturing fault or poor design.

The garage says this is a common fault with BMW's in general since the sump is cast in aluminium and not steel. They are also saying it is not classed as a latent defect . I suspect a dodgy mechanic because I have never known a sump bung thread to wear ever.

I look forward to your comments.

Regards

Andy

robby71 · Sep 19th, 2006, 10:36 PM

Sounds as though the mechanic has overtightened/ stripped the thread, i had this on a motorbike and had to have the sump removed, hole re-threaded/ larger plug fitted

MINIMANIAUK · Sep 19th, 2006, 10:48 PM

unusual as the main dealers suck the oil out of the dipstick and do not remove the sump plug!

smc · Sep 20th, 2006, 02:28 AM

The first screw in contact and mating with the block was incorrect at the first place as a result will cause damage to the threads.

JG.26 · Sep 20th, 2006, 02:18 PM

Sounds to me the thread has been damaged at the last oil change, probably cross threaded,your best bet is simply to get a new sump, I doubt they cost that much and more reasuring than having the existing sump re-threaded.

JG.26 · Sep 20th, 2006, 02:24 PM

Quote: Originally Posted by MINIMANIAUK (original)

unusual as the main dealers suck the oil out of the dipstick and do not remove the sump plug!

I doubt very much that is true as why bother having a drain plug at all. I have an aftermarket sump plug with an oil temp sender attached and have to make sure the dealer fits a new copper sealing ring at each oil change. Maybe some dealers do suck the oil out but mine doesn't, I would have thought it's better to let gravity drain the oil down rather than trying to force it up.

DurhamFox · Sep 20th, 2006, 03:12 PM

was replaced on my MCS under warranty the last time it went in for other work. The dealer pointed out it was weeping and needed changing so did it. 20k miles btw.

robby71 · Sep 20th, 2006, 04:01 PM

i had my oil changed 2 weeks ago and the mechanic (independant BMW) removed the sump plug, let the oil drain, removed the filter (at which point lots more oil came out of the sump), replaced the filter, put the sump plug back in and filled with new oil

I've heard some dealers use a drain through the dipstick tube to suck the oil out but surely it can't get all the crap out of the bottom of the sump that way? i'd prefer to see them do it the old fashioned way through the sump plug

Sep 19th, 2006, 09:30 PM	#1
Router MINI2 Newbie Join Date: Sep 2006 Local Time: 01:04 AM Posts: 1 Offline	Sump Bung problems on 2001 cooper over 80K miles Anybody had a problem with the thread wearing on the sump bung after 80K miles? I have one of the first Cooper's and it was serviced yesterday for the 6th time and I get a call from the garage to say that the thread is broken due to wear! The question is how can a thread wear when it it has been only undone 6 times? If its due to vibrations then surely its a manufacturing fault or poor design. The garage says this is a common fault with BMW's in general since the sump is cast in aluminium and not steel. They are also saying it is not classed as a latent defect . I suspect a dodgy mechanic because I have never known a sump bung thread to wear ever. I look forward to your comments. Regards Andy

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Sep 19th, 2006, 10:36 PM	#2 (permalink)
robby71 MINI2 Regular My Classifieds Join Date: Jul 2006 Location: Huddersfield Local Time: 12:04 AM Posts: 180 Offline	Sounds as though the mechanic has overtightened/ stripped the thread, i had this on a motorbike and had to have the sump removed, hole re-threaded/ larger plug fitted

Sep 19th, 2006, 10:48 PM	#3 (permalink)
MINIMANIAUK MINI2 Sponsor Join Date: Mar 2006 Local Time: 01:04 AM Posts: 1,035 Offline	unusual as the main dealers suck the oil out of the dipstick and do not remove the sump plug!

Sep 20th, 2006, 02:28 AM	#4 (permalink)
smc smcc Join Date: Oct 2005 Location: Singapore Local Time: 09:04 AM Posts: 302 Offline	The first screw in contact and mating with the block was incorrect at the first place as a result will cause damage to the threads.

Sep 20th, 2006, 02:18 PM	#5 (permalink)
JG.26 MINI2 Master Join Date: Oct 2003 Location: Virtual World Local Time: 01:04 AM Posts: 1,063 Offline	Sounds to me the thread has been damaged at the last oil change, probably cross threaded,your best bet is simply to get a new sump, I doubt they cost that much and more reasuring than having the existing sump re-threaded.

Sep 20th, 2006, 02:24 PM	#6 (permalink)
JG.26 MINI2 Master Join Date: Oct 2003 Location: Virtual World Local Time: 01:04 AM Posts: 1,063 Offline	Quote: Originally Posted by MINIMANIAUK (original) unusual as the main dealers suck the oil out of the dipstick and do not remove the sump plug! I doubt very much that is true as why bother having a drain plug at all. I have an aftermarket sump plug with an oil temp sender attached and have to make sure the dealer fits a new copper sealing ring at each oil change. Maybe some dealers do suck the oil out but mine doesn't, I would have thought it's better to let gravity drain the oil down rather than trying to force it up.

Sep 20th, 2006, 03:12 PM	#7 (permalink)
DurhamFox MINI2 Regular Join Date: Nov 2005 Location: Leicestershire Local Time: 12:04 AM Posts: 171 Offline	was replaced on my MCS under warranty the last time it went in for other work. The dealer pointed out it was weeping and needed changing so did it. 20k miles btw.

Sep 20th, 2006, 04:01 PM	#8 (permalink)
robby71 MINI2 Regular My Classifieds Join Date: Jul 2006 Location: Huddersfield Local Time: 12:04 AM Posts: 180 Offline	i had my oil changed 2 weeks ago and the mechanic (independant BMW) removed the sump plug, let the oil drain, removed the filter (at which point lots more oil came out of the sump), replaced the filter, put the sump plug back in and filled with new oil I've heard some dealers use a drain through the dipstick tube to suck the oil out but surely it can't get all the crap out of the bottom of the sump that way? i'd prefer to see them do it the old fashioned way through the sump plug

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