Finally ordered all the engine parts to finish the bike off, as well as a new SAVA MA rear tyre (cheers to Darren from www.ozminimoto.com.au ) so time to start getting all the engine parts prepared for the rebuild.
First port of call is the crankcases. These are from a stock 911 rep motor and are basically identical internally to the polini ones so im happy to use them (im using the same on my elite bike). The factory uses gasket sealer on them so the gasket usually never comes off clean, so there is quite a bit of work involved to make the crankcase halves seal properly again without the need for sealant.
First is to give the cases a good clean to get the oil and grime off. i used a tub filled with diesel and a big paintbrush which works well for getting all the oil and clutch dust off.
I didnt get any before pics but the first thing i do is to scrape off the big chunks of gasket with a razor blade. The blade has to be held at a fair angle to stop it gouging into the aluminium.
Having done that the next step is to raid the kitchen for the scotchbrite.
The Scotchbright is good for taking all the baked on bits of gasket off that wont come off with the razor. They're quite gentle on the aluminium as well so you cant really remove enough metal with them to be of concern. I used the scotchbright with soapy water and scrub away. some of the harder baked on bits i had to hit with carb cleaner before scrubbing. One thing to take note of is you have to THOROUGHLY clean the cases out afterwards because the plastic fibres from the scotchbright will be everywhere and are going to go straight into the crank bearings if the cases arent clean.
But the end result is pretty good. These should now seal without any sealer which makes the next rebuild a pretty big nightmare. If they dont then the next job will be to make a mandrel to hold the cases so i can skim them flat in the lathe.
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