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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 7 Series / 8 Series > 7 Series - E65 / E66 (2002 - 2008)

7 Series - E65 / E66 (2002 - 2008)
Discussion of BMW's 4th generation E65/E66 7 Series flagship. The E65 generated much controversy, due to its radical styling and iDrive user difficulties. Nonetheless, the E65 broke records to become the best-selling 7-series iteration ever, especially after its 2005 facelift.

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  #1  
Old 06-10-2015, 03:13 AM
stoney2014 stoney2014 is offline
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Location: Athens
 
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Mein Auto: E65 750i oct 2006
Oil consumption and brake discs

Hello I have an e65 750i from sept 2006. I bought it a year ago and was unlucky with it. So far I've had a new ecu put in, had a coolant leak in bottom of engine which required engine taking apart etc, had all gaskets changed, new water pump, gearbox service, new alternator, fuel pump and a few other bits. So far around 9500 euros in repairs in past year with 95k miles. The latest potential issue is since I had engine rebuilt I've done around 300 miles and oil on I drive screen has gone from just above max to max level. Then next week after another 100miles it went to half way between max and min. Then 50 miles later and a few days it went back to max. There's no obvious leak or smoke. I did some research and opinion is totally divided. Some say certain engines use a litre of oil every 1000-2000 miles. Others say it should never happen. Where I live there are traffic lights every mile and I am heavy footed. Someone also said its normal for first thousand miles after having engine rebuilt to bed in? My garage who are Bmw specialists say it's normal on most 7 series they see here. Does temperature effect oil level? Does it expend and contract as it does get very hot here sometimes. Finally I'm about to change brake discs. I searched on eBay but there seems to be too much choice. I'm not bothered about upgrading to sporty discs. Just want the normal ones like I have from factory. What brand do you suggest? Thanks in advance.
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  #2  
Old 06-10-2015, 04:18 PM
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Emeer18 Emeer18 is offline
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It could be a bad oil level sensor.
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  #3  
Old 06-12-2015, 05:07 AM
stoney2014 stoney2014 is offline
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Mein Auto: E65 750i oct 2006
Oil sensor fine. No one else able to help on brakes or oil? Thanks
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  #4  
Old 06-12-2015, 07:17 AM
lozzmeister lozzmeister is offline
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Mein Auto: e31.e38.e39.e65
oil consumption

im sorry but you cant just make a statement like (the oil level sensor is fine) when as far as i know its impossible for your oil level to be full then half empty then full again after more miles ! have you checked the oil level from cold with the car parked on a flat surface using the dipstick ? thats the only sure way of knowing if the oil level is dropping ..

if its not then theres every reason to suspect tho oil level sensor
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  #5  
Old 06-12-2015, 07:19 AM
lozzmeister lozzmeister is offline
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Mein Auto: e31.e38.e39.e65
brake discs

re brake discs

best bet is go to bmw give them your vin number and buy the discs from them

there are cheeoer options but you get what you pay for
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  #6  
Old 06-12-2015, 08:29 AM
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spyders 745li spyders 745li is offline
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Oil level sensor. Cheep and easy fix. OEM is 15.00 , OE is 7.00 can go bad very easy

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  #7  
Old 06-13-2015, 08:43 AM
stoney2014 stoney2014 is offline
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Mein Auto: E65 750i oct 2006
The oil sensor is new. I had it replaced. Does outside temperature effect oil? It seems to have stabilised.
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  #8  
Old 06-13-2015, 10:33 AM
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spyders 745li spyders 745li is offline
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Viscosity of the oil is usually only effected above or below temp extremes. Did you check the wiring on the sensor?

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  #9  
Old 06-13-2015, 10:38 AM
stoney2014 stoney2014 is offline
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Mein Auto: E65 750i oct 2006
Good point. I'm getting car oil changed next week (before a Europe road trip) and guibo joint replaced so while its in I'll get the sensor and wiring replaced while its there
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  #10  
Old 06-19-2015, 06:50 AM
stoney2014 stoney2014 is offline
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Mein Auto: E65 750i oct 2006
Had it in today for oil change. He checked the sensor and wiring and insisted its ok. He checked for burning, checked oil pressure and for leaks even though all gaskets throughout are new and nothing. Bmw specialist told me about half of them use a litre every 1-2 thousand miles and he sees it every day on the v8s. He did ask if I'm heavy footed which I am. Btw changed guibo joint and gears so smooth now and now judder when touching accelerator now
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  #11  
Old 06-19-2015, 07:21 AM
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spyders 745li spyders 745li is offline
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Good to hear

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  #12  
Old 06-20-2015, 08:51 AM
gammodm gammodm is offline
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Maybe be bad oil check valves, there are 6. I had oil pressure problem and pulled those out after the sensor was determined to be good. 4 of my 6 were bad
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  #13  
Old 06-20-2015, 10:01 AM
stoney2014 stoney2014 is offline
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Mein Auto: E65 750i oct 2006
My pressure was perfect, but could they be responsible for a leak?
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  #14  
Old 06-21-2015, 03:22 AM
lozzmeister lozzmeister is offline
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Mein Auto: e31.e38.e39.e65
oil leek

so your sure you loosing oil now ?
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  #15  
Old 06-21-2015, 05:33 AM
stoney2014 stoney2014 is offline
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Mein Auto: E65 750i oct 2006
Yes but it's only half a litre every 1000-1500 miles
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  #16  
Old 06-22-2015, 01:24 AM
stoney2014 stoney2014 is offline
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Mein Auto: E65 750i oct 2006
Now the latest is 'dynamic drive failure' when I was parking slowly. I'm guessing steering angle sensor but getting sick of endlessly poring money at this car. Going back to Audi A8 next time I can afford to as the two I had never had issues
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