Why does this drain plug have a chunk of threads cut out?

Ran into this while doing an oil change, why is this like this? Why is there a chunk of thread missing? Vehicle is a 2019 Buick Cascada. Based on the look of things, At one point before it came to me the threads got cross-threaded or stripped, there was an attempt to retap and rethread the hole. There was a HeliCoil installed, And it came out while I was removing the drain plug.

HootinNHollerin,

Missing nsfw tag lol

not_that_guy05,

What threads? Am I missing something here cause I see that oil pan threads are no longer there…

If this is a shit post, well done.

focusforte,

Yeah, the striped threads are what had me looking closer than usual, but not related to the question I had. I was more curious if that cause Cut away section was factory or part of the thread repair that some one attempted before I got it

not_that_guy05,

That’s a factory cut due to the pan being lower than the hole for drainage.

TragicNotCute,
@TragicNotCute@lemmy.world avatar

I don’t know, but if I give a wrong answer, you should get a better right answer from someone else.

I googled it and this is what I found:

Looks like it’s at the low point in the pan to make the drainage more complete.

littlebluespark,
@littlebluespark@lemmy.world avatar

IANAM, but it took one glance at the photo to know why there was a drainage route through the threading: um, drainage.

espentan, (edited )

I think it’s just to allow for more of the spent oil to drain from the pan. Seen it on many different cars.

Edit: Keep in mind that not having a full set of threads makes the plug more sensitive to over torquing. Drain plugs do not require a lot of torque. Look up the specs for your car and use a torque wrench if you’re uncertain.

focusforte,

So, you think this came from the factory like this?

espentan,

Yes, I’m quite certain it did.

focusforte,

Interesting 🤔 I’ve seen some with drain holes in the threads, but this is the first one I’ve seen with such an excessive cutaway.

littlebluespark,
@littlebluespark@lemmy.world avatar

Are you sure you should be touching anything under the hood, mate?

focusforte,

Oh hush lol, I’m learning and the aftermath of the failed thread repair got curious because I’ve not seen one like that before, wasn’t sure just how much the last guy messed it up vs what was factory. Other guys in the shop weren’t sure either.

littlebluespark,
@littlebluespark@lemmy.world avatar

“Messed it up”? Do you have no concept of how much talented work that would take to aftermarket gouge a channel like that without any damage to the nearby threads? No warping, no scuffing, not a single scratch? Fucksake. You can laugh at your momentary lapse in common sense, or you can double down and make excuses for it. Only the latter isn’t being a dumbass twice in a row, kiddo.

focusforte,

Lmao, you’re so mad 🤣 and you’re not even paying attention. I said the threads were damaged. Stop trying to be an elitist asshole and pay attention. As I pulled the drain plug out the attempted repair pulled out with it. What you’re seeing here is after it was cleaned back up and I could finally see it better. The other tech had already started tapping and recutting the threads.

How about instead of calling me a dumbass you actually try to be a decent person?

  • All
  • Subscribed
  • Moderated
  • Favorites
  • •
  • askmechanics
  • slotface
  • kavyap
  • thenastyranch
  • everett
  • tacticalgear
  • rosin
  • Durango
  • DreamBathrooms
  • mdbf
  • magazineikmin
  • InstantRegret
  • Youngstown
  • khanakhh
  • ethstaker
  • JUstTest
  • ngwrru68w68
  • cisconetworking
  • modclub
  • tester
  • osvaldo12
  • cubers
  • GTA5RPClips
  • normalnudes
  • Leos
  • provamag3
  • anitta
  • megavids
  • lostlight
  • All magazines
    •