New Pistons installed ,side covers and sump fitted ,note: the deck has been machined to ensure it’s flat and true.
Head is reassembled with all new Valves. The valve heads were pitted from corrosion and machining them would have made the valve head margins too thin.
Cylinder head, water pump, and distributor drive fitted .Timing chain was replaced with a superior Iwis Chain,the one in the pic was just used to help install the new chain.
Accessories added and nearly ready to install in the car.
The new engine and trans are installed with a new oil pan ,rear and front crank seals. New injectors with new intake manifold gaskets,timing chain and rails should see a nice reliable tow car for the owner 🙂 .New fuel hoses and clamps will connect the fuel system together .
Unfortunately the engine in the Moss green ute was damaged by who ever it was that did the soda blasting ( i hate that stuff….) .It looks as though the car was covered in the bicarb and then driven around their yard with the air cleaner off… or the air cleaner was clogged so they took it off and then proceeded to drive the car. Any how, the soda got into the engine and has ruined the rings and pistons . A combination which has destroyed any hope of compression and no compression equals no start. I stripped the m116 3.5 engine down and my worst fears were realised with massive bore wear 
As usual the head studs were frozen in the heads and it was days work to remove the heads .The valve seats are pitted because of the biCarb soda .
After pricing the gaskets and rings etc the parts cost came close  to $6000 so after consulting the owner it was decided to fit a good 2nd hand engine . After a days hunting a M117 450SL engine was found and this is a Djet engine also so the engine bay will resemble a standard 280SE 3.5 .
This has now been stripped and new seals fitted , the alloy parts have been wet blasted .The timing chain, sliding rails etc will be replaced and the injection system overhauled . The sump has been swapped from the SL short version to the 280SE 3.5 larger version .Water pump was replaced as it wasn’t known how long the engine was on the shelf.
The engine bay was pretty filthy so all of the dirt of 40 years was steam cleaned out in preparation for repair of the paint before the new engine goes in.
An update n the cabrio’s engine job. After some time a set of new pistons has been made to suit the new bore size (1mm oversize) which was necessary to repair the pitting caused by water getting into the engine at some time in the past.
Crank shaft has been linished ,balanced and cleaned .Connecting Rods have checked for straightness,big and small end bore true and new small end bushes fitted and honed to size.
New pistons and rings with new bearing shells fitted .
New side plate and block bungs are fitted ,with the crank and pistons installed after checking clearances and fitting new crank seals.
Distributor and pump drive installed with sump .New timing chain and slide rails are also in place.
The oil pump was measured and was within specs.
i rebuilt this engine 3 years ago but it was plagued with a leaky rear seal . It’s a 10 hour job to get it out of the car and the car isn’t driven much so it took a while to fit it into the schedule .
6.3 #2206 has been removed from  my neighbours front yard to go off to her new owner to get the restoration she deserves.
After Christmas 2016 and I’m slowly catching up with all of the work in the shop,first up is further rust repair on the W112 Â 300SE lang. under the booster it had rusted, not badly ,just ugly …
Years of spilled brake fluid has burnt off the paint ,leaving the steel bare and open to rust.
The rusted parts have been removed and inside the crossmember cleaned and rust treat .
New top piece has been cut out of Zinanneal 1mm  to match the existing panel,
because of the complex shapes ,the replacements have to made in cardboard first to get all the shapes organised first.
With the engine now stripped down and measured in preparation ,the head has been cleaned to reveal some corrosion 
The seats are worn but not pitted but the cylinders #5 & 6 show a lot of pitting indicating a leaky head gasket in the past . the head will be machined slightly to get rid of the pitting.
The valves will probalby replaced if grinding them removes too much of the valve sealing face.
The Front drivers side has a bit more rust repair required esecailly under the brake booster. The booster had to removed because of a lack of brakes.
This is the section under the brake booster ,the round hole is where the booster is mounted to the car . this sort of corosion is caused by leaking brake fluid removing the paint .
This the front inner part under the positon where the air cleaner is mounted . Rust has eaten the inside of the upper chassis section out .
And… the underside of the booster . No wonder the car was idling fast and without brakes.
the new doors are in process of being derusted .:-)
Nest step will etch priming then priming in preparation for paint.
250 S in very straight condition. Been off the road since 2010 due to a minor fault. This is a project car and will require normal work to get registration etc . There is very little rust in the right front sill front and the rear boot box bottom,right hand side. 
No rust in the doors or floors!! no dash cracks ,and the MBtex seats are still very good. Original boot mat is in very nice condition . 
benzkraft 