Decided to do a separate thread from my "Revival of an Imola".
So what happen was....
Since I bought the car I noticed oil smoke from the exhaust when coming to a complete stop on deceleration downshifting.
This situation had me concerned and the more I looked on the forums, it looked like it was a kind of common issue.
The was no oil on the plenum but nonetheless I replaced the oil separators and all the hoses. Problem was still present.
This was not affecting performance whatsoever and was more of an embarrassing issue.
At the end of 2016 I started making plans to install a ESS supercharger but before doing this decided to tackle the smoke situation and decided to refresh my S62.
Note: Before opening up the engine I did compression and leak down test to discard piston rings as the culprit of the oil situation.
All the results (5% leak) where very good and close to each other.
This left me with the assumption that my valve stem seals were the problem.
Here is the plan:
1- Tear down the S62.
2- Send the heads to the machine shop
3- Put it back together
Parts to be used:
1- Head gasket set 11121407805
2- Bottom end gasket set 11111407804
3- Rod bearings
4- Rod bolts
5- Vanos seal kit (Includes Beisan o-rings, solenoids o-rings, etc...)
7- Chain tensioner
8- Chain guides
9- Crank dampener bolts
10- Water pump, thermostat, etc...
11- Head gasket
12- Cylinder head bolts
13- Bunch of overpriced BMW o-rings...
Will also be doing a Heat Exchanger delete.
This "while in there" motto, did some serious damage to my Supercharger funds...
Worth to mention that I will be doing all the work myself with my buddy Mike that owns Euro Spec Automotive in Tampa, FL.
Any advice is welcome!!
Some of the parts.
On to the pictures!
This is it so far.
The heads will be ready for pick up next Friday.
1- Should I replace the piston rings? If I do... do I need to do anything special to the block bores?
2- Can I remove the pistons to clean them and reinstall? (I will make sure they go back in the same spot)