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Using a thread chaser on an Iron head

1013 Views 8 Replies 4 Participants Last post by  Steve Johnson
Rectangular port 188's on a 454. The heads are on the block. I'm concerned about crud and maybe a some metal shavings where they might end up (I am using a true thread chaser kit, not a tap, but I still think some metal may be cut out with the chaser). I see that some of the holes have passages past the threads. I can use grease on the thread chaser but wonder if I'm doing more harm than good. So should I chase the threads in the head or leave them be?
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Got all the thread sealer out. Time to Gasgacinch the gaskets. As always I appreciate the help. As another member mentioned in his thread "Team Chevelle is the best tool in his toolbox" and I agree :yes:
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