GDB4 4 cylinder Model Engine Build – Dodged a Bullet Today

Dodged a Bullet Today

I made an error this week machining the Block Top Plate and it really gave me pause. The part needs to be .227″ tall and I started with 1/4″ thick stock that ended up .242″ after I had squared it up and fly cut the top and bottom. When I programmed the tool paths in Fusion360 I miscalculated the amount of raw stock to be removed from the top (.242″ – .227″) and I machined too much material off and ruined it. The top plate is relatively simple and was easy to remake, but what if I had made this mistake on the cylinder block? I have been working on the cylinder block up to this point and have innumerable hours into it. The thought really upset me. I got lucky and dodged a bullet on this one. I need to remain ever diligent and check everything multiple times (I thought I did).

The Block Top Plate seals the water jacket in the cylinder block.

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The good part is sitting on top of the block and the bad part is in my hand,

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I also machined the back of the cylinder block and the oil pan in the same manner as the front as seen in my last post.

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Next up is machining the sides of the cylinder block.

I made the Top Plate wider than it needs to be because I am going to secure it to the cylinder block and then machine the sides of the bock with it in place.

But now I am going to kick back, enjoy the sunset and meditate on my luck.

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