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Old 01-14-2018, 11:30 AM   #161
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Al,

If you are using WD40 for aluminium most of the time, then paraffin (kerosene) is a lot cheaper and works just as well, in fact better sometimes than WD..

John


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Old 01-15-2018, 04:56 AM   #162
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Thanks John. I'll grab a bottle next time I'm at the hardware (it's no longer available at petrol stations round here as far as I know) and give it a whirl. My wife doesn't appreciate the smell of WD40 on my clothes when I come in from the shed - in fact she claims I "stink" - so the kerosene might solve that issue as well.


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Old 01-15-2018, 01:46 PM   #163
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At this point I could bolt the sump on and use the previously machined strip to indicate the front of the block nice and square. The overhang of the front of the sump was a convenient way to pick up the exact bottom surface of the block as well.

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Once I machined the front face down to final dimension, the centre of the block along the bottom (if that makes sense) was then picked up so the crank tunnel could be drilled, bored and reamed to 1/2" and the cam tunnel was similarly drilled and reamed in reference to the crank.

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Next step was the boring of the gear recesses. This engine uses an idler gear in the geartrain so the camshaft rotates in the same direction as the crank does. I assume it was designed this way to give a nice vertical separation between the crank and cam while also keeping the individual gear sizes relatively small.

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The timing cover mounting and associated accessory holes were drilled and tapped at the same time while I still had the crankshaft centre point as a reference.

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Finally, the block was flipped over to the back face and again indicated off the previously machined strip. The whole face was then taken down to final dimension and (although they're not in the picture) the 2 rear coolant holes were drilled and tapped. Apart from 2 bell housing adapter holes which have their placement determined later in the build, the front and rear block faces are now complete. So far, so good.

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Old 01-15-2018, 06:13 PM   #164
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Looking good AL, I like your work. Cheers, Peter


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