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1954 Mercedes Benz M189 Engine repairs

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Some time ago I rebuilt this engine but during the running in process it had a rattle, which would only come at a particular rev range ,but was otherwise smooth. Once the sump was off ,the bottom of the oil pan was inspected and odd tiny peices of metal which looked like bearing metal . The rod caps were removed and the bearing,although not completely destroyed are scuffed really badly.  Why? 

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My initial thoughts were to pull the oil pump off as this is an obvious oil supply problem .Although the pump was inspected atc when the engine was rebuilt I decided to strip it right down and two things popped right out . First, the round wear mark in the pump shaft housing . and that square hole . It’s actually a fault in the pump housing as far as i can figure .It would appear that this hole has allowed the oil ,once hot to lose a fair amount of the pump vacuum as it sucks the oil up from the sump . So,once the car got up to temperature and at highway speeds the oil volume would fall away although the gauge would still be indicating full pressure at engine speeds above idle speed. 

Next step will be to replace the oil pump and bearings and inspect the oil pressure relief valve ,then reassemble the engine and install it back into the car.

 

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220SE Restoration .

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This is an early 220SE which has been sent in from overseas for a complete make over. .All of the bright trim is being removed followed by a strip back to bare metal .IMG_0072

Unfortunately some repairs in the past were not very well done and will need to be made right to remove rust which is just starting under the body filler.

Here, the front mudguards have been welded to the sill/rocker sections. These are unibody car and they flex a lot which cracks any joins which should not be welded up.

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Not a very clear picture but this is the Drivers side.

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This the rear end of the Sill section at the drivers side rear door. The seams have been filled,again this must be rectified.

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Passenger is side is the same with much work required to fix. As can be seen in both pictures, both jacking points are missing … 😦

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This the Seam at the top of the rear quarter which again has been badly filled and is cracking with rust showing through the paint .

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The bottoms of the doors are showing signs of rust where the door rubbers seat , this will have to cleaned out and treated to prevent further rust.

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Inside the door groove there is a little rust which has just been caught in turn.

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In the past the doors have been sprayed inside  with bituminous under coat, which unfortunately never works .This will be removed and a proper rust sealer applied.

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This is the drivers side 1/4 light frame which unfortunately is rusted away so the hunt begins for a new or better one.

 

 

 

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Mercedes Benz 280SE 3.5 ute Engine swap.

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 .

Mercedes 220SE restoration

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Front Suspension restoration 

As can be seen the engine mounts were the wrong type and totally worn out . 

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The brakes are stripped off and a note taken of the various colour splashes which indicate the spring specs, the check marks (yellow and white) for the bolts which were applied in the factory to show that the bolts were tightened correctly.

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KONICA MINOLTA DIGITAL CAMERAAfter stripping down,inspecting and repainting everything the Front axle is reassembled with new parts as required. 

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Front brakes have been converted to discs and the hubs are fitted with new rotors.

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The various colour splashes are redone 

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New Brake hoses are in the red plastic bags to protect them while the front axle is reassembled.

220SE Restoration.

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The reconditioned parts are laid ,plus two new bearings, O rings for the housing and concertina seal for the Pump shaft .

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The armature was tested and the commutator polished ,the mica seperator segments were cut down slightly and the new bearings fitted. 

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There are several washers,spring type drive plates and packing seals under the impeller,all designed to last a long time and prevent fuel leaking into the motor housing. 

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The motor housing contains the field coils and brushes these were all checked and found to be OK. it was then fitted with new O rings and tested to ensure it was OK electrically.

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Lastly ,the pump mount rubber and metal bracket are fitted. As this is a very early injected car ,the pump is mounted on it’s side hence the odd bracket. a new fuel pressure hose is shown here ,A New hose from the tank to the pump will have to be made .As this also differs,in that the hose is screwed into the tank,not simply slipped onto a nipple as the others are. 

HORNS.

The horns were both stripped and the rust and dents removed. the bodies were reassembled after being repainted.KONICA MINOLTA DIGITAL CAMERA

After reassembly they were tested and adjusted for tone. There is a high tone and low tone horn .KONICA MINOLTA DIGITAL CAMERA

 

220SE Mercedes Restoration.

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A view of the bonnets surface showing a reflaction in the primer coats,indicating the smooth surface prior to final primer coats and finish coats. 

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Right rear corner of the roof ,still a few imperfections to clear up but almost finished.

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Feed pump for Fuel injection. The pump besides looking pretty rough wasn’t working very well so has been stripped and inspected. 

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The commutator on the armature is completely worn out .Possibly because the brushes had been replaced with ones that are too hard.

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The lower armature bearing was seized because of water getting in at some time .

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Both Horns have stripped to remove Rust and ensure correct function.

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Horn diaphragms have been cleaned to remove all traces of rust prior to repainting.

 

Mercedes 220SE Restoration

 The Bonnet has been stripped to the metal and primed several times and is at last getting smooth enough . KONICA MINOLTA DIGITAL CAMERA

The Roof however is a different matter. It has sever damage all over it some of which i hammered out and metal finished but some is too badly damaged to completely remove so it has been leaded . The darker spots are Low spots and the lighter spots are high spots revealed in the first primer and guide coats. It’s as if someone had gone over the roof with a ball pien hammer KONICA MINOLTA DIGITAL CAMERA

The boot Lid is similar but not as bad as high spots made by things being carried in the have hit the skin . In the meantime other panels are also getting the primer ,sand,Primer,Sand,Primer routine too..

Mercedes 300SEL 6.3 Rust repair

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This 6.3 had been patched in the past but unfortunately a drain hole was left out .The tail lights were not installed properly and water leaked in, rusting out the previous repair .

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Holes appeared in the side of the rear quarter. KONICA MINOLTA DIGITAL CAMERA

After the bumper was removed the paint was ground off and lots of body filler was revealed ,which in turn covered more rust. KONICA MINOLTA DIGITAL CAMERA

The bottom of the 1/4 Box was unpicked and yet more rust and dodgy repairs uncovered. this is inside the box looking up from underneath. 

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The box bottom and the section from the chassis rail were removed to get rid of all the rust.

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The Support bracket has been repaired in the past but had rusted out again ,then repaired again

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Compared to the new pArt there is a lot of difference …….

 

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New panels were made up to replace the damaged parts. At this point the outer skin hasn’t been removed .

 

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A new section has been welded in to replace the rusted section

Followed by a couple of coats of etch primer then seam sealer.

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