Cleaning threads of block drain ports and transmissions drain plugs
After putting back the plugs on the block and transmission from winterization I noticed they were heavily crusted with rust and had a hard time threading them back in. I was able to clean them enough to get the plugs back in but they don't go in very deep and didn't want to reef on them hard in case they were going to ruin the threads.
What do you guys do to clean the threads? Do you use an SAE tap and re tap them carefully to clean out the rust etc?
Re: Cleaning threads of block drain ports and transmissions drain plugs
Run a tapered pipe tap in the hole. Do not cut the treads deeper, just clean them. Next fall, coat the threads with grease or vasoline to keep the rust off.
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Re: Cleaning threads of block drain ports and transmissions drain plugs
Pb blaster next time you pull them out..
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Re: Cleaning threads of block drain ports and transmissions drain plugs
If you use a 9/16" wrench to take the plug out, which I believe is true, then yes it is 1/4" NPT.
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Re: Cleaning threads of block drain ports and transmissions drain plugs
I would coat the threads both the plug and the hole w/ never-seize after you clean the threads.
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Cleaning threads of block drain ports and transmissions drain plugs
Why do you leave them out all winter? I take mine out, and after it drains I put them back in
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