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 .
I’ve been restoring a 190SL for an owner and part of the task involves rebuilding it’s non standard DCOE carbs. A lot of W121’s were fitted with these over years to get around the problems thrown up by the awful Solex side draft carbs originally fitted.
On one of the latest jobs, a very sweet W111 220SE cabriolet i had to sort out a leak in the power steering. Specs call for a maximum of 1 mm free play in the shaft ,but this was had close to 10 mm and a slight leak . After contacting the local vickers dealers and getting no where fast I bought the complete kit to overhaul the pump from Mercedes Classic Center. Special tools are required to reassemble the pump ,mainly to fit the bush into the housing after the shaft and the two shell half’s are fitted, then a further tool to fit the outer seal.
The above pic shows the bush installer in place
The original shaft has a straht shaft where the pulley fits but the new one has a taper with a slot for a woodruff key.
A new pulley was also installed with a taper bore ,thankfully available from the classic center.
A new Job into the shed is this lovely 220SE cabrio with 71,000 miles on the clock. As with a lot of these low mileage injected Mercedes , lack of use is a killer and this one is a prime example . The car has been hard to start with plug fouling and blowing smoke. The valve guide seals were replaced last but what is actually happening is that the injection pump oil seals have failed.
Symkptoms were very typical, hard starting from cold, and sluggish running especially when cold. Sluggish aceleration was another red flag > Did the usal check by disconnecting the throttle and opened it up from idle, it stalled almost imeediately which,although the plugs indicated a rich mixture,the engine cut out. This meant it was running lean.
A quick easy check!.
Next,I unscrewed the cam box dipstick to reveal this black substance oozing from the dip stick port….
The oil seals in the pump have failed, sending oil into the cam box which slows down the governor leading to sluggish acceleration ,and this oil also gets into the fuel being injected leading to the plug fouling and intermittent exhaust smoke problems.
Next job is to examine the engines thermostat to make sure it is working correctly. A cold running engine with MFi will always run rich because the MFi’s own thermo control thinks it’s cold and keeps the pump delivering extra fuel. This rich running do0es and will cause bore wear,and very rapidly too.