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-   -   4.4 N62 white smoke out exhaust left side (http://www.bimmerfest.com/forums/showthread.php?t=621937)

wmgerlach 05-19-2012 01:39 PM

4.4 N62 white smoke out exhaust left side
 
I bought this with the idea it would be better than a ford but I think not. Purchased at 68K now have 91K its started to smoke white to light gray,to me looks like oil smoke, oil burning in the cylinder. It seems logical to me, valve oil seals are the issue. And from what I have learned from the post site could be. Looking for help on doing this myself since independent shop wants $3200 plus machine shop cost so the cost would be higher. Has anyone done this ? If so can you send any tips in what to watch out for or not do?Before I remove the heads I will perform a compresion test to establish a base line. Any help and tips would be appreciated. Thanks
And this will be the first and last BMW I ever buy. Seems durability just sucks. Had a 1995 ford Tauris ran till 195000 miles with out engine or transmision failure. Just reguler service,Drove a 2004 4X4 diesel 6.0 with less trouble than this 05 X5

LeMansBeast 05-24-2012 11:21 AM

Ya you could go back to Ford, but then you'd be stuck driving, well, a Ford.

BM0rri5 05-24-2012 02:12 PM

Don't give up on the BMW brand!
I've owned a 2002 745i that I didn't have a single problem within the time I owned it, and they say thats the worst year to buy a 7 Series.
I've owned my 2001 X5 4.4i since December, have put 10k miles on it so far, and haven't had problems except a little quirk with the transmission electronics.

Regardless, good luck with the X5!
:thumbup:


Quote:

Originally Posted by LeMansBeast (Post 6854463)
Ya you could go back to Ford, but then you'd be stuck driving, well, a Ford.

He's right ;)

1hander 06-02-2012 02:23 PM

check you crankcase pressure regulators, they get gunked up and cant release crankcase pressure, if that doesnt fix it, its the valve seals, very common issue, sometimes if you do an engine flush, it helps...other wiser its just try some valve seal repair lubricants or go to thicker oil, it will lessen the dsmoke but it will never go away

airplane 12-01-2012 07:29 PM

I have an 04 X5 4.4 with the same problem. Yhe CCVs were replaced about 1K ago but still have smoke. I am going to do a Liqui-Moly flush and then put a 10w30 Redline oil in it and see what happens. If there is still a problem I am going to replace the valve stem seals myself I have read up on it and dnt think ill have a problem. I have a good friend that is a full time mechanic in case I have a problem. If you do your vehicle I would be very interested how it went. Thanks in advance!

wmgerlach 08-19-2015 09:03 PM

Well I think its time for a update on this bimmer thing, The exhaust smoke at idle got so bad the mrs didn't want to ride in it, seems it was embarrassing. I didn't, thought it was kinda cool, especially when there was a bmw or Mercedes behind it at a stop light. Any way at 148k decided time to look into this smoke thing. I did some research and did see there is a tool that can be used to change out the valve seals in frame, but this is a x5 engine bay. To all those that have done this in frame your some patient mtfks. I did keep in mind it has 148k, so some engine diagnostic should be done before jumping to conclusion its only valve seals.
The first check was crankcase vacuum, actual was 13in of water, spec not to exceed about 11.5 next compression check varied from 175 -185 with one exception was 150. spec calls no more differential of 30 psi, I believe was the spec. Next why low compression on one cyl? brought out the cylinder leak down test and found a intake valve leak on cyl 4.
In my opinion you remove one head you remove both. Removed both heads and a bmw affiliated machine shop replaced 32 valve guides, grind valves install new valve seals from Victor Rense, because they are the new style Viton seals which bmw should have used. Viton is a registered trade mark name. operating temp range to 400 degrees F. While the heads were off replaced alternator and repair the alternator mounting bracket oil leak that all 4.4s have. And all the coolant and oil hoses. I also checked cam timing, before removal and found cams out as much as half inch, that makes cam timing retarded. Probably due to chain stretch. That will be the next big expense when it happens.
Well now for some better news its been almost 20k since this was done and I replaced the radiator about 3k miles ago. And the better news is oil consumption went from 1qt per 500 miles and remember bimmer says its a performance engine and normal is considered about 1 qt at 750mi. I say BS. The oil consumption on highway was well within spec. On 1k highway drive it wouldn't use oil, but combination highway and city it would use oil. Now even after 20 k I change oil at 12k. I do not add oil between changes, it will use about 1qt between changes. I still drive it like I stole it. I did recheck crankcase vacuum and it is also down well within spec 7.5in water actual. I haven't rechecked compression yet, but I will just to see how much it changed.
One recommendation unless you have some engine experience this type of engine repair is not for the average diyer. And regarding the fears of cam timing with the correct tools and a manual its a non issue. Meaning just take your time and recheck your work.
But I do miss that ford diesel.

tony745li 08-28-2015 08:03 AM

I got the AGA VALVE STEM TOOL KIT*
For rent
4145172179 tony

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