Which Oil Drain Plug?
Race Director
Joined: Oct 2004
Posts: 12,860
Likes: 4,661
Drifting
Joined: Sep 2017
Posts: 1,959
Likes: 690
From: Avon Lake OH
First make sure the gasket or sealing O-ring under the flange head of the drain plug is in place or not cracked or damaged. If needed replace the oil pan drain plug. If it still leaks, then hopefully its not damaged treads in the pan (aluminum) vs the oil pan drain plug (steel). You can try a couple wraps of Teflon tape on the oil pan drain plug threads to see if that works as a temporary fix. If the oil pan treads are damage, then it may need to be drilled and tapped for a larger size drain plug. Not sure if a Helicoil would work in this application due to the need to repeatedly removing the drain plug for normal oil changes.
Race Director
Joined: Oct 2004
Posts: 12,860
Likes: 4,661
First make sure the gasket or sealing O-ring under the flange head of the drain plug is in place or not cracked or damaged. If needed replace the oil pan drain plug. If it still leaks, then hopefully its not damaged treads in the pan (aluminum) vs the oil pan drain plug (steel). You can try a couple wraps of Teflon tape on the oil pan drain plug threads to see if that works as a temporary fix. If the oil pan treads are damage, then it may need to be drilled and tapped for a larger size drain plug. Not sure if a Helicoil would work in this application due to the need to repeatedly removing the drain plug for normal oil changes.
Racer
Joined: Mar 2020
Posts: 265
Likes: 63
From: Virginia
First make sure the gasket or sealing O-ring under the flange head of the drain plug is in place or not cracked or damaged. If needed replace the oil pan drain plug. If it still leaks, then hopefully its not damaged treads in the pan (aluminum) vs the oil pan drain plug (steel). You can try a couple wraps of Teflon tape on the oil pan drain plug threads to see if that works as a temporary fix. If the oil pan treads are damage, then it may need to be drilled and tapped for a larger size drain plug. Not sure if a Helicoil would work in this application due to the need to repeatedly removing the drain plug for normal oil changes.
Thread Starter
Pro
Joined: Jul 2020
Posts: 548
Likes: 132
From: Texas
I’m pretty sure the threads are fine on both the bolt and the pan are fine. Autozone and Oreillys seem to only carry the Dorman brand. Rock Auto has the GM but you have to buy 10 of them. I really don’t need 10. LOL. Any one that fits fine?
Racer
Joined: Mar 2020
Posts: 265
Likes: 63
From: Virginia
What's wrong with Dorman at Autozone or OReilly's?
Thread Starter
Pro
Joined: Jul 2020
Posts: 548
Likes: 132
From: Texas
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Racer
Joined: Mar 2020
Posts: 265
Likes: 63
From: Virginia
Oh. I certainly presume so.
I lied about what I bought - they are Fel-Pro 70820, and I bought 10. $2.64 each, and everybody else has them, too, including Advance Auto and O'Reilly's. Or order some from Amazon next time you buy a bag of "organic" kitty litter or "green" doggy biscuits.
Or you can go to the Chevy dealer (or probably any GM dealer) and buy a few OEM. I did that years ago, but I swear they charged me something like $5 each. Can't remember for sure, though.
I lied about what I bought - they are Fel-Pro 70820, and I bought 10. $2.64 each, and everybody else has them, too, including Advance Auto and O'Reilly's. Or order some from Amazon next time you buy a bag of "organic" kitty litter or "green" doggy biscuits.
Or you can go to the Chevy dealer (or probably any GM dealer) and buy a few OEM. I did that years ago, but I swear they charged me something like $5 each. Can't remember for sure, though.
Burning Brakes
Joined: Feb 2022
Posts: 888
Likes: 980
From: NW Burbs of Chi-Town
2025 C5 of the Year Finalist - Modified
Quality. Not cheap. Made in the USA. Super strong magnet.
Oil pan:
https://goldplug.com/shop/ap04/
Diff:
https://goldplug.com/shop/ap07/
M6 trans:
https://goldplug.com/shop/ip04/
Edit: I have all of these plugs installed in my car. Great strong magnets in these plugs. I bought my car in Montana as well.
Oil pan:
https://goldplug.com/shop/ap04/
Diff:
https://goldplug.com/shop/ap07/
M6 trans:
https://goldplug.com/shop/ip04/
Edit: I have all of these plugs installed in my car. Great strong magnets in these plugs. I bought my car in Montana as well.
Advanced
Joined: Jul 2023
Posts: 87
Likes: 22
From: SW CO
Probably also available at auto-parts stores that stock Dorman.
Use a torque wrench when you tighten it. I do. Factory spec = 25 N-m [18 lb-ft]. This is a light torque for an M12-thread fastener, but with the resilient seal it is OK. If you were to switch to a plug with an aluminum crush washer, the torque would be higher.
Last edited by vito02; Nov 7, 2023 at 07:17 PM. Reason: Update