Has anyone tried oil additive to restore valve stem seals?
03-13-2014, 04:13 PM
#13
New Members
Thread Starter
Join Date: Nov 2011
Location: Manchester, UK
Posts: 116
Likes: 0
Received 3 Likes
on
3 Posts
My Ride: BMW 550i
No where near New York anyway. it is not a problem find someone who can fix it but it is a costly repair like I said if this stuff can fix it why not to give it a go. just replaced all other gaskets common to leak such as engine bracket gasket, both timing case gaskets, vacuum pump gasket, rocker cover gaskets so I did expect valve stems to fail one day
03-15-2014, 08:52 PM
#16
Contributors
Join Date: Aug 2004
Location: San Diego
Posts: 952
Likes: 0
Received 0 Likes
on
0 Posts
My Ride: 2015 535D M Sport
Try using Valvoline High Mileage FULL SYNTHETIC (not the blend version) 5W-30. Recommended for vehicles with over 75K miles. It has seal softeners and is safe, apparently meets BMW LL-01 standards but is not BMW approved. It is hard to find, even at Walmart where on line they said they had it, but didn't really stock it on the shelf. I got several cases at Amazon for around $50 per shipped free. Worth a try before you shell out big bucks for new guides and seals. CHANGE YOUR OIL every 5000 miles. It's my suspicion that volatile crud levels that harden seals and gaskets build up after that. The 15K oil change interval is dangerous.
Last edited by gwf545; 03-15-2014 at 08:59 PM.
03-16-2014, 06:12 AM
#17
Members
Join Date: Dec 2011
Location: Puget Sound area WA
Posts: 52
Likes: 0
Received 0 Likes
on
0 Posts
My Ride: 2004 545i
Check out post 31
schpenxel's fix his head gasket thread - Page 2 - Bimmerfest - BMW Forums
Valve cover change and new ccv valve hose. Bulletin released by BMW design change to Banks 1-4. Issues with old system caused secondary air codes, smoke during long idles, and oil consumption. also there is a kit out there that lets you replace the valve seals without removing the heads and cam assemblies.
schpenxel's fix his head gasket thread - Page 2 - Bimmerfest - BMW Forums
Valve cover change and new ccv valve hose. Bulletin released by BMW design change to Banks 1-4. Issues with old system caused secondary air codes, smoke during long idles, and oil consumption. also there is a kit out there that lets you replace the valve seals without removing the heads and cam assemblies.
03-16-2014, 08:09 AM
#18
New Members
Thread Starter
Join Date: Nov 2011
Location: Manchester, UK
Posts: 116
Likes: 0
Received 3 Likes
on
3 Posts
My Ride: BMW 550i
this is very interesting but I still believe this is not a cause of my problem. 1. I don't experience any smoke on cold start. 2. when looked inside of manifold it did not look oily. I am aware about new AGA tool kit which is $759 but delivery to UK is insane $200 also I would have to pay 20% tax. all that would bring it to $1110 for me. it might be worth paying someone to do it.
04-08-2014, 08:20 AM
#19
New Members
Thread Starter
Join Date: Nov 2011
Location: Manchester, UK
Posts: 116
Likes: 0
Received 3 Likes
on
3 Posts
My Ride: BMW 550i
problem sorted now. here is my write up about it
A little write up about replacing valve stem seals with AGA tool kit on N62 550i - Bimmerfest - BMW Forums
A little write up about replacing valve stem seals with AGA tool kit on N62 550i - Bimmerfest - BMW Forums
04-08-2014, 11:42 AM
#20
Senior Members
Join Date: Jul 2008
Posts: 3,652
Likes: 0
Received 0 Likes
on
0 Posts
My Ride: 2006 BMW 550i
problem sorted now. here is my write up about it
A little write up about replacing valve stem seals with AGA tool kit on N62 550i - Bimmerfest - BMW Forums
A little write up about replacing valve stem seals with AGA tool kit on N62 550i - Bimmerfest - BMW Forums
when or if did bmw update the seal design on the v8?