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By slumlord444 - 10 Years Ago
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Finally installed the heads on my ongoing engine rebuild. Masking everything off getting ready to paint it and noticed two tapped holes on the bottom of the heads. one on each end. You can see the end head bolts through them. Stock heads have no such holes. I am assuming that they were needed in the manufacturing process and that all I need to do is install short bolts with sealer and forget them but I hate to assume anything. Am I missing anything?
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By Ted - 10 Years Ago
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Ron. If you’re talking about the 5/16-18 threaded holes that would be on the front of the right cylinder head and the rear of the left head, those are identical to the holes that are in the factory heads. The oil dipstick tube on the front sump pans typically uses that hole to hold the tube in place. These do not need any sealer or bolts in them if not being used.
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By slumlord444 - 10 Years Ago
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Ted, I am talking about the ones on the bottom of the head just around the corner from where your arrow is pointing.
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By charliemccraney - 10 Years Ago
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That's for the generator bracket, if I remember right.
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By slumlord444 - 10 Years Ago
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Don't think so. They are not on my stock heads unless I am really confused, which does sometimes happen.
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By charliemccraney - 10 Years Ago
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I just checked. It is for the generator bracket. Your old heads should have it.
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By paul2748 - 10 Years Ago
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On the other end, is that for the spark plug wire brackets?
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By slumlord444 - 10 Years Ago
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Ok guys, looked again at my stock head that is stuffed in a cabinet and I am only half stupid . There is a hole on one end of the stock head but not the other. After looking at some pictures, the generator bracket mounts on the passenger side front and the spark plug loom probably mounts on the back of the drivers side head. Have to revise my first post and limit the question to the one extra hole. I assume just stick a bolt in it and forget it unless I find something else I want to bolt to the head.
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By charliemccraney - 10 Years Ago
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One plug wire bracket does mount to the passenger side head but it mounts to the intake flange, behind the distributor. The other plug wire brackets mount to the block.
Since the heads are essentially the same, left and right, one will have that hole at the front of the engine and the other will be at the rear.
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By Ted - 10 Years Ago
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Ron. While the aluminum heads do have threaded holes on both ends of the lower edge versus the factory heads only having those same threaded holes only at the right front and the left rear of the engine, the threaded holes that are not being used for attaching anything can be left open. Those holes are not drilled or threaded into anything that will leak. Here's a revised picture of the threaded holes that are in question.
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By airman - 10 Years Ago
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the dipstick tube is mounted on the front on my engine, the generator bracket mounts to the timing cover.
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By Ted - 10 Years Ago
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Airman. I’m going to suggest putting a rear mount on the alternator. As you have pictured, the belt tension will want to twist the alternator into a crooked or non-aligned position with the other pulleys. Here’s a picture of what I did with a ’56 Ford with its alternator conversion. It actually uses the original bracket with the alternator mount being welded to that.
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By slumlord444 - 10 Years Ago
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Thanks Ted. That's the answer I was looking for. I will probably put an Allen head plug in it for appearance sake.
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By airman - 10 Years Ago
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ive got another brace for the back of the alternator its not installed in the picture, I made the lower bracket and the rear bracket, the upper is stock off of the original generator
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