May 11, 2012

Rusty B20B engine


After being for more than 12 years dismantled most engine parts of the B20B were quite rusty.
I tried cleaning up the cylinder head, piston rods and some other parts with steel wool.
But it just wasn't going to get me too far.
After removing the grease and dirt it was obvious that the head and block need a light face and the bores a light hone. Another thing to do while the engine was still in parts was balancing the flywheel, crankshaft and piston rods.

After some surfing on the Internet I found Chris Milton Engine Developments just around the corner...
Specialised in high performance engines and engine developments and ... they have engine baths !

After bathing the parts the crankshaft journals needed a grind to get rid of pitted surface. Because of the grinding I couldn't use the original new bearings that came with the car :(
The chemicals in the bath are very aggressive so it's also necessary to replace the camshaft bearings after bathing the block.

The results are shocking good :
Volvo B20B head before cleaning
Volvo B20B head before cleaning

Volvo B20B head before cleaning
Volvo B20B head before cleaning

Volvo 122S B20B head after bathing and a light face
Volvo B20B head after bathing and a light face

Volvo B20B head after bathing and a light face
Yes, it's the same head

Crankshaft Volvo B20 before cleaning and grinding
Crankshaft Volvo B20B before cleaning and grinding

Crankshaft Volvo B20B after cleaning, balancing and grinding
Crankshaft Volvo B20B after cleaning, balancing and grinding

Rocker shaft B20B before bathing and cleaning
Rocker shaft Volvo B20B before bathing and cleaning

Rocker shaft Volvo B20B after bathing, steelwool "polish"
The rocker shaft took a bath, after that I took it apart, cleaned it with steel wool and soaked it in oil.

Volvo B20B flywheel before balancing
Flywheel before balancing

Volvo B20B flywheel machine stepped and balanced
Flywheel machine stepped and balanced
see drilled holes between the 2 white lines

Friday I can pick up the block with the new cam shaft bearings and the cleaned inlet- outlet manifold, Pics of the results will follow. So it's time to find me some long bolts to mount the engine on the engine stand and start reassembling the B20B.

But... before reassembling the engine needs a good paint, red, Volvo red.






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