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05-19-2013, 10:50 AM #1Senior Member
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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?
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05-19-2013, 11:35 AM #2
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.
Sent from my Droid Charge using Tapatalk 2Joe
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05-19-2013, 05:41 PM #3Senior Member
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The store sells thread taps and thread cleaners. You want a cleaner, they look very similar. Use it to clean out the threads and put grease or vasoline on the thread cleaner to keep the stuff in the goop and not in the head.
Anti-sieze the plug threads to help prevent corrosion.1997 MasterCraft 205
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05-19-2013, 10:26 PM #4Senior Member
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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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05-29-2013, 08:04 PM #5Senior Member
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05-30-2013, 11:13 AM #6
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.
Sent from my Droid Charge using Tapatalk 2Joe
2014 LSV
2010 Outback V - Sold
1993 Echelon
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05-30-2013, 02:39 PM #7
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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PWI as usual...
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05-30-2013, 04:29 PM #8
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
Sent from my iPhoneDavid
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05-30-2013, 06:31 PM #9Senior Member
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05-30-2013, 07:47 PM #10