Home Forums Articles How To's FAQ Register
Go Back   Xoutpost.com > BMW SAV Forums > X5 (E53) Forum
Fluid Motor Union
User Name
Password
Member List Premier Membership Search Today's Posts Mark Forums Read

Xoutpost server transfer and maintenance is occurring....
Xoutpost is currently undergoing a planned server migration.... stay tuned for new developments.... sincerely, the management


Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 09-12-2012, 12:20 PM
Member
 
Join Date: Oct 2011
Location: south africa
Posts: 30
pieter4458 is on a distinguished road
N62 engine valve stem seals

I sit with a engine doing the smoke screen trick at traffic lights or then crawling in traffic and then accelerating. Feedback from my mech i that the N62 engine - 4.8is is a valve stem seal problem child and it cost a bag full of money. the car done only 110 000 km!

the proposal is to do the following:

1. Take heads off, recon heads, new head gasket, replace valve guides and seals - most expensive option
2. Keep heads on vehicle with compressed air in piston and only do the Valve guides - Cheaper option

Now the question is: which one?
Reply With Quote

Sponsored Links

  #2  
Old 09-12-2012, 01:10 PM
Member
 
Join Date: Oct 2011
Location: NYC
Posts: 4,426
SlickGT1 is on a distinguished road
What year is your car?
The option choice is up to you.

How does one do option 2 anyway?
__________________
2006 4.8is, Black on White.

"The older we grow the greater becomes our wonder at how much ignorance one can contain without bursting one's clothes." - Mark Twain

Unlock OBC post 5
Reply With Quote
  #3  
Old 09-12-2012, 01:41 PM
TwinTurboGTR's Avatar
Premier Member
 
Join Date: Aug 2009
Location: Monmouth County, Nj
Posts: 1,718
TwinTurboGTR is on a distinguished road
What year is it again? Please put your info in your sig. Just as Slick and I have. You may be able to call BMW for a goodwill fix. It is not a guarentee, but what do you have to lose? Worse case they say "no". Good case they say they will pay 50% of the cost, best is that they cover the entire nut!
__________________
2011 E70 50i M Sport


Exterior: Alpine Weiss III Interior: Nevada

PACKAGES: .
Reply With Quote
  #4  
Old 09-12-2012, 02:43 PM
Member
 
Join Date: Oct 2011
Location: south africa
Posts: 30
pieter4458 is on a distinguished road
The car is just out of its maintenance plan period (100 000km plan) and it is a 2005 4.8is with 110000km.
Reply With Quote
  #5  
Old 09-12-2012, 03:11 PM
TwinTurboGTR's Avatar
Premier Member
 
Join Date: Aug 2009
Location: Monmouth County, Nj
Posts: 1,718
TwinTurboGTR is on a distinguished road
Doesn't matter. A lot of members here has major problems and reached out to BMW and they offered to provide assistance to some owners. Situation vary and results vary as well. It doesn't hurt to give it a try.
__________________
2011 E70 50i M Sport


Exterior: Alpine Weiss III Interior: Nevada

PACKAGES: .
Reply With Quote
  #6  
Old 09-13-2012, 01:38 PM
Member
 
Join Date: Jul 2012
Location: Ma.
Posts: 76
Franksauto is on a distinguished road
There should be a recall on that freaking engine!!!! Everyone that has a 4.8 is experiancing an exhaust smoke issue to some degree. Unlike the 4.4 where its usually just a crankcase vent valve, the 4.8 is the guides and stem seals. Replacing the stem seals is just a temporary fix if anything. The guides wear which creating play between the stem and the guide causing side to side play or a rocking motion. The seals, no matter how tight will leak from this rocking motion. A new pair of heads is the way to go. New heads with all nessesary parts and labor will run over $10K from BMW. Average cost for valve setm seals from BMW is over $3500 and they will not gaurentee valve seal replacement will cure the smoke. In other words you will be throwing your money away. How can a $70k plus vehicle have this on going problem and no recourse? I really think you will see a class action suit against BMW in the near future. Just my 2 cents.

Last edited by Franksauto; 09-13-2012 at 02:16 PM.
Reply With Quote
  #7  
Old 09-13-2012, 03:47 PM
Member
 
Join Date: Oct 2011
Location: south africa
Posts: 30
pieter4458 is on a distinguished road
I am so glad there is more people in the world feeling this way. The bad thing is the Dealer knows this and let you run the the maintenance plan out and tel you bull shit stories of vent valves and all BMW engines uses oil and when the F&*($#@ car is out of maintenance plan, they just say: Sorry your problem, please pay!

For the average man out there to pay these ridiculous prices to fix a recall problem is not on. Even the price of stupid valve stem seals are totally overpriced (Maybe it is made of crude oil and Platinum).

The only option is to make it someone else problem and sell it, but this passing the problem onto a next sucker to complain. There must we a way to stop this bully tactic of "big Brother"
Reply With Quote
  #8  
Old 09-13-2012, 04:32 PM
Member
 
Join Date: Oct 2011
Location: NYC
Posts: 4,426
SlickGT1 is on a distinguished road
You guys know you can replace the stem seals without taring the entire engine to pieces. You use compressed air to hold the valve up, so that it doesn't fall into the cylinder. Work from the top, and you can replace the stem seals fairly easy.

You will need a cylinder compression tester type of tool though to pump air into the cylinder.
__________________
2006 4.8is, Black on White.

"The older we grow the greater becomes our wonder at how much ignorance one can contain without bursting one's clothes." - Mark Twain

Unlock OBC post 5
Reply With Quote
  #9  
Old 09-14-2012, 06:22 AM
Member
 
Join Date: Jul 2011
Location: UK
Posts: 123
IanP is on a distinguished road
Quote:
Originally Posted by SlickGT1 View Post
You guys know you can replace the stem seals without taring the entire engine to pieces. You use compressed air to hold the valve up, so that it doesn't fall into the cylinder. Work from the top, and you can replace the stem seals fairly easy.

You will need a cylinder compression tester type of tool though to pump air into the cylinder.
Out of interest how do you compress the valve springs to remove the collets? Took a bit of doing with the heads off and using a valve spring compressor when I did mine.
Reply With Quote
  #10  
Old 09-14-2012, 09:44 AM
Member
 
Join Date: Oct 2011
Location: south africa
Posts: 30
pieter4458 is on a distinguished road
To do the compressed air method is much cheaper, but are the valve guides not shot as well when the seals goes?
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On





All times are GMT -4. The time now is 06:56 PM.
vBulletin, Copyright 2018, Jelsoft Enterprises Ltd. SEO by vBSEO 3.6.0
2017 Xoutpost.com. All rights reserved. Xoutpost.com is a private enthusiast site not associated with BMW AG.
The BMW name, marks, M stripe logo, and Roundel logo as well as X3, X5 and X6 designations used in the pages of this Web Site are the property of BMW AG.
This web site is not sponsored or affiliated in any way with BMW AG or any of its subsidiaries.