Valve Stems, Valve Cover, Timing Cover, Valley Pan, Rear Cover, etc...All Leaking - Page 17 - Bimmerfest - BMW Forums



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X5 E70 (2007 - 2013)
E70 BMW X5 produced between 2007 and 2013. Discuss the E70 X5 with other BMW owners here.

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  #401  
Old 10-21-2019, 08:15 AM
Danno123 Danno123 is offline
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That sudden increase in oil consumption is odd. Did you get a recent oil change? I'm wondering whether the shop put a thinner oil in.
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  #402  
Old 10-21-2019, 08:36 AM
BabyUnicornTaco BabyUnicornTaco is online now
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Originally Posted by Danno123 View Post
That sudden increase in oil consumption is odd. Did you get a recent oil change? I'm wondering whether the shop put a thinner oil in.
I did my last oil change 5,000 miles ago. The usual 0W40. Nothing new.
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  #403  
Old 10-22-2019, 06:28 AM
Danno123 Danno123 is offline
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Ugh. I was hoping for your sake it was something easy. I read this thread all the way through. You've done a great job with your car. I wish you luck.
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  #404  
Old 10-22-2019, 08:06 AM
BabyUnicornTaco BabyUnicornTaco is online now
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Ugh. I was hoping for your sake it was something easy. I read this thread all the way through. You've done a great job with your car. I wish you luck.
Thanks for taking the time to read it over. The good news is that all the work I completed previously is still holding up after 10,000 miles. Thats a big success for someone with my complete lack of experience before attempting. It takes at least about 3 minutes of idling to get the visible smoke so maybe I have a little bit of time if I can deal with the oil consumption. I'm still searching for any random other sources but it will probably circle me back to VSS.
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  #405  
Old 12-08-2019, 11:52 AM
BabyUnicornTaco BabyUnicornTaco is online now
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For those of you that keep up, here is my update that may put me at the X5 crossroad. I have not completed the valve stem seal replacement yet. Oil consumption improved a little and the smoke has somewhat lessened after long idles but still there slightly. CCV diaphragms are good. Found my oil level low as well. Maybe at 1/4 on the dipstick. No warning in I-Drive. Also got a coolant level low warning. No evidence of leaks. No drips. Weep hole is dry. Took 1-2 quarts of 50/50. Also found that the rear side and corner of the passenger side valve cover is leaking after 14,000 miles. Power has diminished. Coolant looks clear and oil is clean. So here are a few questions:

1. Any way that the valve cover leak in that area could ever cause smoke from the exhaust tips?

2. Where did my coolant go?

3. Suggestions?

As usual, thank you all for the support and ideas.



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  #406  
Old 12-08-2019, 01:00 PM
deroy deroy is offline
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1. No. How would outside oil make it to the inside of the exhaust? Also: Drips on the cats burns blue.
2. A pressure test of the cooling system seems what you need to do.


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  #407  
Old 12-08-2019, 01:26 PM
BabyUnicornTaco BabyUnicornTaco is online now
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Originally Posted by deroy View Post
1. No. How would outside oil make it to the inside of the exhaust? Also: Drips on the cats burns blue.
2. A pressure test of the cooling system seems what you need to do.


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Yeah. Pressure test for sure. Thatís a pretty big loss of coolant for no visual leaks, but I have tested before and can do it again.

Iím guessing my loss of performance is most likely the vacuum leak from the VCG. At least the leak tells me that my oil consumption is not solely due to my VSS and will be fixed with the VSS.

Thanks for the reply. Remember I am far from a mechanic. 14,000 miles from the VCG is disappointing.


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  #408  
Old 12-08-2019, 05:06 PM
ansh22197 ansh22197 is offline
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I had both symptoms: oil consumption (1 quart per 600 miles) and low coolant warning without apparent leaks. Stem valve seals is a must job for 4.8, it fixed the oil consumption/smoke (since the job after 2000 miles the oil level has been unchanged on idrive). The coolant was the valley pan gasket. The coolant pooled in V part of the engine and evaporated (it explained the odor after driving in my case). Once the leak got worse, the coolant started dripping from the back side of the engine overnight. While doing these two jobs, I also cleaned injectors professionally with new micro filters and put a stent in the coolant pipe as a preventative maintenance. The power gain was tremendous, so I am really happy how the job turned out. The car is now at 92k. It is 2009...
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  #409  
Old 12-08-2019, 07:08 PM
BabyUnicornTaco BabyUnicornTaco is online now
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Originally Posted by ansh22197 View Post
I had both symptoms: oil consumption (1 quart per 600 miles) and low coolant warning without apparent leaks. Stem valve seals is a must job for 4.8, it fixed the oil consumption/smoke (since the job after 2000 miles the oil level has been unchanged on idrive). The coolant was the valley pan gasket. The coolant pooled in V part of the engine and evaporated (it explained the odor after driving in my case). Once the leak got worse, the coolant started dripping from the back side of the engine overnight. While doing these two jobs, I also cleaned injectors professionally with new micro filters and put a stent in the coolant pipe as a preventative maintenance. The power gain was tremendous, so I am really happy how the job turned out. The car is now at 92k. It is 2009...


Yeah. I replaced my valley pan and transfer pipe. No apparent leaks there. Iím back up to 2,000 miles on the oil consumption but I have the black tailpipes showing the smoke residue. And can make it smoke after a long idle. At almost 170,000 miles I am pushing it on original VSS. Iím guessing I have a hidden coolant leak from a hose, most oil leaving from the VCG, and the impending VSS job. Pressure test coming up first. Then planning.


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  #410  
Old 12-09-2019, 09:30 AM
ansh22197 ansh22197 is offline
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Yeah, at 170k, you are overdue for VSS job. I also have black residue on the tailpipes. I am not that worried about the tailpipe ends as it can be easily cleaned. More concerns for CATs as burning oil is probably not doing any good for them.
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  #411  
Old 01-16-2020, 07:12 AM
theWalkinator theWalkinator is offline
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Did oil change and now I got 2500 miles top off instead of 800 ~1000 miles top off, the previous oil was Castrol 0w-40 now I changed to Castrol Edge 5w-40.
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  #412  
Old 01-17-2020, 10:45 PM
lordshin808 lordshin808 is offline
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Quote:
Originally Posted by BabyUnicornTaco View Post
To be honest, the only experience I had before doing all of this work was changing out the spark plugs on this N62 in August when I had some misfires. I took at least 1,000 pictures and kept everything labeled during this work. I havenít done all of the math but I probably spent about $1,000 in parts and $200 on tools to complete this work. Doing it all at once was key. I would not hesitate to do it again if I ever need to. I can close my eyes and see every bolt, seal, o-ring, and engine layout. The scariest part for me was the first startup after it was complete. If you have another car to drive I say go for it and do it all at once yourself. This gave me a lot of confidence to buy another BMW down the road and not be the one that says goodbye to BMW after getting frustrated and fed up.


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I know exactly what you mean by knowing every nut, bolt, bracket, o-ring. hahaha. I've been messing my 2007 E70 4.8i too. First fixed the coolant weep hole leak with the bimmerfix stint. Then replaced my alternator. I just did the valve cover gaskets and upper timing cover gasket. All these jobs was not done at the same time, so after disassembling the same parts several times, I pretty much know this damn N62 engine by heart. lol
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  #413  
Old 01-26-2020, 07:27 PM
BabyUnicornTaco BabyUnicornTaco is online now
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At this point I made another oil change and was almost at max oil level after 2,000 miles but after a long hot idle I have some smoke. I also for the first time since my repairs found a coolant drip under the X5. I did find that the orange CCV diaphragms that weíre new 14,000 miles ago did not wear evenly. The one on the drivers side was flimsy but still intact. The one on the passenger side was hardened on the outside ring. I just replaced the flimsy one with a proven diaphragm. At this point I think my valve stem seals may be ok but I battle potential engine mount and a new coolant leak issue at the rear of the engine.


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  #414  
Old 01-26-2020, 07:29 PM
BabyUnicornTaco BabyUnicornTaco is online now
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Valve Stems, Valve Cover, Timing Cover, Valley Pan, Rear Cover, etc...All Leaking

This X5 is my full time driver and my kids love it but it may become too hard to maintain at this mileage without a full time backup.


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  #415  
Old 01-26-2020, 08:40 PM
ansh22197 ansh22197 is offline
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...While doing tranny new seals+oil drain/fill I also noticed a small coolant leak from the back of the engine. The leak comes out from the bottom in between the back of the engine and the transmission. I suspect the dreadful backplate leak since the valley pan had been done recently. The fix would require removal of the 200 lb transmission which is beyond my DIY at least for now. It sounds that you might have the same issue...with BMW high pressure cooling system- you fix one leak and the pressure find the next weak link In the system.

Agree 100% - Having an extra car in the garage provides a tremendous peace of mind for bimmer projects - VSS alone is best when done steady and slow over a couple of weeks...just buy something more reliable

Last edited by ansh22197; 01-26-2020 at 08:41 PM.
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  #416  
Old 02-03-2020, 05:43 PM
BabyUnicornTaco BabyUnicornTaco is online now
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Mein Auto: 2008 X5 4.8i E70 Sport
Valve Stems, Valve Cover, Timing Cover, Valley Pan, Rear Cover, etc...All Leaking

Adding an update. After some more research, I torqued the valve cover bolts in the wrong sequence 15,000 miles ago. I used a document that many others use and it is wrong. Probably the source of my slow oil leak. My oil consumption is back to probably 4,000 miles per quart. I had my brother in law do a whole bunch of expensive scan tool tests and calibrations and my engine runs super smooth. The calibrations adjust some timing and relearn adaptations. This might also improve my oil consumption. My rear cover may have a drop or too leak of coolant but only in really cold weather. My engine mounts are now bad. Drivers side of the engine shoots up on acceleration and I have an idle vibration. Seeing the great health of my engine tells me to continue to drive and maintain. Up next is engine mounts and a/c pulley replacement.


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Last edited by BabyUnicornTaco; 02-03-2020 at 05:46 PM.
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  #417  
Old 02-04-2020, 01:26 AM
deroy deroy is offline
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Iím very reluctant to believe you can loose a quart through the valve cover gasket. A quart is a huge lot of drops. You should be smoking and burning oil on the cats all the time.


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  #418  
Old 02-04-2020, 03:16 AM
BabyUnicornTaco BabyUnicornTaco is online now
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Originally Posted by deroy View Post
Iím very reluctant to believe you can loose a quart through the valve cover gasket. A quart is a huge lot of drops. You should be smoking and burning oil on the cats all the time.


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Iím losing it through the valve stem seals as well. They will still smoke after a longer idle.


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