tapping oil pan
Thread Starter
TECH Apprentice
Joined: Nov 2016
Posts: 371
Likes: 18
From: switzerland
tapping oil pan looking for advise on drilling/tapping oil pan (c5) for 3/8 npt. instructions say to do it with oil flowing out. who has done that and how did it go? sounds pretty messy, especially without a lift. maybe a spiral flute* tap is a better solution? they are rare and quite expensive, though ($100+).
*edit: these are for blind holes and push the chips back up as opposed to a "gun tap" that pushes them forward.
*edit: these are for blind holes and push the chips back up as opposed to a "gun tap" that pushes them forward.
TECH Enthusiast
Joined: Feb 2020
Posts: 749
Likes: 210
Old trick I've used on various jobs is to get some air pressure in the crankcase . You can plug off all vents and or pcv openings and put air in the dipstick tube , I would use a low pressure regulator to start and once the hole is established go full flow the escaping air will blow out the cuttings made , Same when tapping but also pack the flutes of the tap with grease and remove , clean and repack often. Good luck
Use a rotacut bit packed with grease to drill it, and pack the tap with grease. Go slow, and remove the tap often to clean/re-pack.
Last edited by 69gto96z; Dec 3, 2022 at 12:00 PM.
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What’s the hole for?
Do you have the two piece pan? If so, remove the lower piece. Problem solved.
If not, I doubt doing it with the pan full would be any better than just drilling and tapping using grease on the bit and tap.
Do you have the two piece pan? If so, remove the lower piece. Problem solved.
If not, I doubt doing it with the pan full would be any better than just drilling and tapping using grease on the bit and tap.
Thread Starter
TECH Apprentice
Joined: Nov 2016
Posts: 371
Likes: 18
From: switzerland
im not removing the pan for this. again, a&a instructs to do it with oil flowing out, josh confirmed it. so im looking to asses the mess it will make, oil running down your sleeves etc.
