The photo appears to show evidence of thread sealant. The only thing I have found to help is localised heating. If a suitable square section bar was to hand (1/2" socket drive?) you could carefully file 4 matching grooves in the bore.
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The photo appears to show evidence of thread sealant. The only thing I have found to help is localised heating. If a suitable square section bar was to hand (1/2" socket drive?) you could carefully file 4 matching grooves in the bore.
>Thanks everyone for your great bits of advice. I'll tackle it at the weekend and let you know how I get on. All the best.
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