Are you using the 65lbs springs on the Gen II Ti valves or are you putting a set of Gen I valves in it too? Just curious.Alright fellas, been tearing down and measuring engines the last few days. I spent a little time and got Lucy’s head ready. So this is kinda a down and dirty track side repair way to clean and “surface” a head.
For $5 at harbor freight, they have non abrasive cleaning wheels. The bristles are plastic and don’t dig in to the surface of the head. Start by spraying the deck of the head with brake cleaner and with a new razor blade scrape the rest of the old head gasket off. (Can do this on the cylinders too) One clean, use the non abrasive wheel to get any left over spots you couldnt get with the razor. Also, go ahead and hit the chambers.
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Once clean, wipe down again with brake clean. Then grab a known good straight edge and a flash light. This is a way to check how flat the head is. Check long ways and diagonal. Put the straight edge on the deck, and but the flash light up aginst the back of the straight edge. If you see any light coming through the front side, that’s a low spot and may require the head to be decked by a machine shop. If you pushed a head gasket, sometimes it will indent the deck of the head in which case you’ll need to have it machined.
Lucy checked out good.
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Next give it a light surfacing. I did this with some 350 grit sand paper and a machined flat piece of aluminum. This takes a little time, but we’re on a tight budget here. Wrap the sand paper around the block and run it from edge to edge long ways. Keep doing the as many times as needed until the deck surface is consistent shiny the whole way. You may notice a few low spots. Just keep going. I thought I was seeing a little low spot. A way to check that is to use machinist blue, blue sharpie... or a black sharpie works too. Paint the area and keep going over the whole head with the sanding block. If any of the blue or marker stays dark, that means there’s a low spot. But it came off evenly, so we’re good.
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You’re done when it looks like this.
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To finish off the head for the budget build, I swapped out the valve springs. APE 65lb dual springs.
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And that wraps up the head. For the cost of parts, and some time, you guys can get some real nice results at home on the cheap.