oil drain cap?

toyotarunner1992 · 12-11-2009, 01:39 AM

I am trying to change the oil in my 87 NA supra and i find not a stud but some rubber gormmet thing with a wing nut on it. when i unscrew the wing nut as far as i can, it jsut starts to twist the stud around in the rubber grommet. WTF... changing oil should be easy i thought... any help would be great... thanks.

916MKIIIx2 · 12-11-2009, 01:48 AM

Hmm? it should just be a bolt and a composite rasin 0 ring on the oil pan plug... as far as I know, if you had a picture that would help.

cre · 12-11-2009, 03:39 AM

So someone installed a drain cock?

Not uncommon, but they do like to clog if the oiling system has sludged up at all.

Or, do you mean an expansion plug?

Where does it all come from???

toyotarunner1992 · 12-11-2009, 06:28 AM

it looks more like the last picture... there isnt a drain dock because i opened it all the way and it just dribbled out. i tried to pull the whole thing out but i am baffled as to why it was like that and HOW TO GET IT OUT... i want to remove it quickly...and ferosiously throw it at a wall... it took 3 hours to drain all the oil... and then it would not go back in... it is the mosts USELESS thing for cars ever invented.

cre · 12-11-2009, 06:42 AM

That's not really for cars... it's used to block off pipes.

I've seen them under the hood once or twice but I dismissed those encounters as more DIY brilliance.

Careful when removing it, or reinserting the screw... the nut on the opposite side could get pushed out into the oil pan. The problem you're probably going to have is that if it is a plug such as those in the second picture the rubber has probably swelled and been cut into by the pan creating a very thick and tough grommet. I would place a very large fender washer on the screw, reinstall the screw enough so you're positive it's securely threaded into the nut on the back side and then try to get a small pry bar in there. You could also try using a hot air gun to heat the rubber and pan to make the job easier, but I wouldn't try a torch.

Can you post a picture?

916MKIIIx2 · 12-11-2009, 08:01 AM

Make sure when you change your oil and get a new, proper screw plug you always change the composite gasket that seals it everytime you change the oil ^^

cre · 12-11-2009, 11:03 PM

Also don't over tighten the plug. there's a thin spot where the flange overlaps that can get crushed creating a dimple which will leak.

12-11-2009, 01:39 AM	#1
toyotarunner1992 Stock Join Date: Nov 2009 Location: Tucson/Phoenix Posts: 12	oil drain cap? I am trying to change the oil in my 87 NA supra and i find not a stud but some rubber gormmet thing with a wing nut on it. when i unscrew the wing nut as far as i can, it jsut starts to twist the stud around in the rubber grommet. WTF... changing oil should be easy i thought... any help would be great... thanks.

12-11-2009, 11:03 PM	#7
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	Also don't over tighten the plug. there's a thin spot where the flange overlaps that can get crushed creating a dimple which will leak. __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

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12-11-2009, 01:48 AM	#2
916MKIIIx2 3" Exhaust Join Date: Nov 2008 Location: California Posts: 152	Hmm? it should just be a bolt and a composite rasin 0 ring on the oil pan plug... as far as I know, if you had a picture that would help.

12-11-2009, 03:39 AM	#3
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	So someone installed a drain cock? Not uncommon, but they do like to clog if the oiling system has sludged up at all. Or, do you mean an expansion plug? Where does it all come from???

12-11-2009, 06:28 AM	#4
toyotarunner1992 Stock Join Date: Nov 2009 Location: Tucson/Phoenix Posts: 12	it looks more like the last picture... there isnt a drain dock because i opened it all the way and it just dribbled out. i tried to pull the whole thing out but i am baffled as to why it was like that and HOW TO GET IT OUT... i want to remove it quickly...and ferosiously throw it at a wall... it took 3 hours to drain all the oil... and then it would not go back in... it is the mosts USELESS thing for cars ever invented.

12-11-2009, 06:42 AM	#5
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	That's not really for cars... it's used to block off pipes. I've seen them under the hood once or twice but I dismissed those encounters as more DIY brilliance. Careful when removing it, or reinserting the screw... the nut on the opposite side could get pushed out into the oil pan. The problem you're probably going to have is that if it is a plug such as those in the second picture the rubber has probably swelled and been cut into by the pan creating a very thick and tough grommet. I would place a very large fender washer on the screw, reinstall the screw enough so you're positive it's securely threaded into the nut on the back side and then try to get a small pry bar in there. You could also try using a hot air gun to heat the rubber and pan to make the job easier, but I wouldn't try a torch. Can you post a picture?

12-11-2009, 08:01 AM	#6
916MKIIIx2 3" Exhaust Join Date: Nov 2008 Location: California Posts: 152	Make sure when you change your oil and get a new, proper screw plug you always change the composite gasket that seals it everytime you change the oil ^^