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7 Series - E65 / E66 (2002 - 2008)
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  #101  
Old 04-02-2013, 04:32 PM
Keif Keif is online now
Master Tinkerer
Location: Houston, TX
 
Join Date: Mar 2008
Posts: 2,201
Mein Auto: 2007 Alpina B7
I pulled one of the heads on my B7 (same N62 engine for the most part) very recently due to a chipped valve. Had new valve guides pressed in (and valve stem seals replaced) while the head was off. Something to keep in mind is that your local machine shop will likely have a machine to compress the valve springs, so if you are pulling the heads, just let them handle that part -- since it's just a headache, takes a long time but no real skill or finesse if you have the head out already.

If you are doing both heads and can drop the engine easily, definitely do so. If not, take a peek through my pictures in this DIY writeup to get an idea of what to expect when pulling the heads. It was a long process, but honestly not as horrible as I expected...not much worse then preparing for replacing the valve stem seals. In some of the pictures you can see the secondary air ports through the exhaust ports in the head, like in the picture below, as well as the secondary air pipe leading from the check valve into the head. Hope this helps in some way. Also noteworthy, the angle of the secondary air ports are such that they would have to be drilled out through where the exhaust valves normally rest.



If you have any questions about pulling the heads, don't hesitate to ask!
__________________
 
Black 2007 Alpina B7
Tension strut bushings
 
White 2007 Alpina B7
Supercharger clutch/bearings, replaced exhaust valve/pulled head, sunroof seal, 6000K angel eyes
 
Black 2002 BMW 745Li (sold)
KW v3's, blue angel eyes, 8000K headlights & HID fogs, rebuilt alternator & mounting bracket gasket, sunroof seal, CCVs, plugs, sway bar bushings, timing & valve cover gaskets, valve stem seals, guibo joint, mechatronic sealing sleeve, trans fluid, sanded headlights...

Last edited by Keif; 04-02-2013 at 04:47 PM.
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  #102  
Old 04-02-2013, 05:23 PM
Stephen Max Stephen Max is offline
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Location: Austin, TX
 
Join Date: Jul 2010
Posts: 64
Mein Auto: 1998 M3, 2004 545i
Quote:
Originally Posted by Keif View Post
I pulled one of the heads on my B7 (same N62 engine for the most part) very recently due to a chipped valve. Had new valve guides pressed in (and valve stem seals replaced) while the head was off. Something to keep in mind is that your local machine shop will likely have a machine to compress the valve springs, so if you are pulling the heads, just let them handle that part -- since it's just a headache, takes a long time but no real skill or finesse if you have the head out already.

If you are doing both heads and can drop the engine easily, definitely do so. If not, take a peek through my pictures in this DIY writeup to get an idea of what to expect when pulling the heads. It was a long process, but honestly not as horrible as I expected...not much worse then preparing for replacing the valve stem seals. In some of the pictures you can see the secondary air ports through the exhaust ports in the head, like in the picture below, as well as the secondary air pipe leading from the check valve into the head. Hope this helps in some way. Also noteworthy, the angle of the secondary air ports are such that they would have to be drilled out through where the exhaust valves normally rest.



If you have any questions about pulling the heads, don't hesitate to ask!
You sir, are a scholar and a gentlemen. So it was easier to pull the heads with exhaust attached rather than drop the subframe and remove the exhaust before pulling the heads?
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  #103  
Old 04-03-2013, 10:28 AM
Keif Keif is online now
Master Tinkerer
Location: Houston, TX
 
Join Date: Mar 2008
Posts: 2,201
Mein Auto: 2007 Alpina B7
I was doing this in a little single-car garage and just didn't have the patience to drop the subframe. Sure, it would have been a little easier to physically lift and drop the head into place if the exhaust manifold wasn't still bolted on, but I really think it was only marginally more difficult once I figured out how to angle everything to get in and out past the starter (rock the head up and toward the passenger side of the car, to almost vertical, then lift a little and pull out toward the front of the car).

That all being said, I didn't pull the driver's head, so I don't know how challenging that side might be, but I don't think it would be all too bad -- since you're not fighting the starter.

Also, I ended up not needing the red engine support bar at all -- I thought I would need it to support the weight of the head and exhaust manifold, but didn't; though it was pretty heavy, it was manageable, and much more manageable with the support bar out of the way lol.
__________________
 
Black 2007 Alpina B7
Tension strut bushings
 
White 2007 Alpina B7
Supercharger clutch/bearings, replaced exhaust valve/pulled head, sunroof seal, 6000K angel eyes
 
Black 2002 BMW 745Li (sold)
KW v3's, blue angel eyes, 8000K headlights & HID fogs, rebuilt alternator & mounting bracket gasket, sunroof seal, CCVs, plugs, sway bar bushings, timing & valve cover gaskets, valve stem seals, guibo joint, mechatronic sealing sleeve, trans fluid, sanded headlights...

Last edited by Keif; 04-03-2013 at 10:34 AM.
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  #104  
Old 04-05-2013, 10:52 AM
LDC5 LDC5 is offline
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Location: North of Boston
 
Join Date: Dec 2012
Posts: 26
Mein Auto: 545i
Hi Keif,
I have been getting ready to pull my heads to tackle the infamous clogged 2ndary air ports.....so, besides finding a weekend with enough time to dive into this, I'm down to getting my hands on the Camshaft alignment tool set. I've been trying to find a place with reasonable rental rates, unfortunately no luck up here in the northeast (just north of Boston).

If you bought the tool, any interest in selling?
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  #105  
Old 04-06-2013, 04:48 AM
svett svett is offline
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Location: Southern, CA
 
Join Date: Sep 2012
Posts: 49
Mein Auto: 09 X5, 05 545i
Quote:
Originally Posted by LDC5 View Post
Hi Keif,
I have been getting ready to pull my heads to tackle the infamous clogged 2ndary air ports.....so, besides finding a weekend with enough time to dive into this, I'm down to getting my hands on the Camshaft alignment tool set. I've been trying to find a place with reasonable rental rates, unfortunately no luck up here in the northeast (just north of Boston).

If you bought the tool, any interest in selling?
Hey LDC5,
I would watch the video and see if AGA's tool kit will fix the problem first.
May save your a crap load of time and $ bro. My car is going in Monday there
to fix a P0491 CEL llight and a full bank 1 cleaning/new erg valve.
I will report the result w/ some pics.

Steve
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