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05-20-2003, 10:21 PM
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CC Member
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Join Date: Dec 2000
Location: Salt Lake City, UT USA,
Posts: 234
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Not Ranked
Aluminum oil pan drain threads
Does anybody know of an insert or such that I can use in an aluminum oil pan to repair the threads?
The thread is a 1/2-20, and a helicoil set is about $50.
Any ideas?
BigMike |
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05-20-2003, 10:59 PM
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CC Member
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Join Date: May 2001
Location: California,
Ca
Cobra Make, Engine: NAF 289 Slabside Early Comp Car with 289 Webers and all the goodies. Cancelling the efforts of several Priuses
Posts: 6,592
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Not Ranked
BigMike
Unfortunate situation, hang in there.
If the pan is off or can be removed it is easier and you have more options such as welding and rethreading for OEM size but I would avoid using a helicoil due to potential leakage. It will be easier to verify that it is clean when you are through also.
I would suggest drilling/machining/resizing to use either a 9/16" or 5/8" drainplug. SAE (fine) threads are from an engineering standpoint best reserved for use in steel not aluminum.
If you want to do the repair with the pan on the car it can be done. Determine what size plug you will use if you are not using the Helicoil. With a SHARP drill bit of the correct size slowly drilll the hole making an attempt to collect all of the shavings. Then heavily coat the SHARP tap with grease and recut the threads cleaning it often and keeping grease on it to collect the chips. Be sure it is straight so the sealing washer will seat flat under the head of the plug. Flush with a couple of quarts of oil from the top to remove any chips before you screw the plug back in place.
Good luck
Rick
__________________
Rick
As you slide down the Banister of Life, may the splinters never be pointing the wrong way 
Last edited by Rick Parker; 05-20-2003 at 11:19 PM..
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05-21-2003, 06:23 AM
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CC Member
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Join Date: Nov 1999
Location: Harrison Township,
MI
Cobra Make, Engine: Superformance, 460/560hp
Posts: 55
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Not Ranked
A temporary fix is to use a rubber expanding plug. Essemtially as the plug is tigthened the backing nut compresses the rubber to seal the hole. Most autopart stores carry them. I was told that these can be used for a couple of oil changes. At $3-4 each replacing at each change until you drop the pan and repair is junk change.
Jeff |
05-21-2003, 06:40 AM
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Senior Club Cobra Member
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Join Date: Dec 2001
Location: Shasta Lake,
CA
Cobra Make, Engine:
Posts: 26,615
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Not Ranked
BigMike,
Another possible solution to your pan problem is once you get the threads fixed use the quick drain system and you never have to remove the plug again, hence no chance of stripping the threads again. Roscoe has a picture of his I think if you can get him to post it. He has posted it before but it was some time ago and I can't find it. I don't have a picture of my drain but all you do is take the cap off, put the little drain hose on and as it screws onto the brass end, like a waterhose onto a faucet, it opens the valve and lets the old oil out. Also much cleaner than messing with the drain plug and dropping it into the pan or having the hot oil on your hands.
Ron    |
05-21-2003, 06:55 AM
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CC Member
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Join Date: Nov 1999
Location: Harrison Township,
MI
Cobra Make, Engine: Superformance, 460/560hp
Posts: 55
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Not Ranked
If you have any information on the quick drain system I would be interested.
I have canton pan and the plug is on the side. It would be a lot easier to direct the oil flow into a bucket, downward, with the car on the lift. My plug in my last pan got stripped.
Thanks!
Jeff |
05-21-2003, 06:59 AM
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CC Member
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Join Date: Mar 2000
Location: Fairfield, NJ, USA,
NJ
Cobra Make, Engine: A & C, 351W, Tremec 3550. Exiled Member: Club Cranky
Posts: 5,897
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Not Ranked
Here is is and worth every penny. Not only do you never unthread it, you don't get even one drop of oil on yourself.
Quick Drain Oil Pan Couplings
The Quick, Clean, High Tech Way To Change Oil
Easy to connect - No drain plug to remove.
Eliminates the potential of oil spillage because it drains
directly into the waste-oil container.
http://www.racerpartswholesale.com/aero4.htm
also try
http://www.jegs.com
Roscoe
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Roscoe
"Crisis occurs when women and cattle get excited!"....James Thurber
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05-22-2003, 10:42 AM
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CC Member
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Join Date: Dec 2000
Location: Salt Lake City, UT USA,
Posts: 234
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Hey, Thanks, Guys.
I will repair and go to the quick-drain.
Best regards,
BigMike
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05-22-2003, 01:33 PM
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CC Member
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Join Date: Dec 2000
Location: Whippany, NJ,
Posts: 454
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Oil change without oil getting all over your hands? That's just not normal!
Oh, and normal car parts stores sell those quick drain setups. (I think it's $13 or so, and that's with the male/female/tube)
-steve in nj-
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"I wanted to meet interesting and stimulating people of an ancient culture and, kill them."
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05-22-2003, 09:15 PM
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CC Member
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Join Date: Apr 2003
Posts: 6
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Not Ranked
A good parts store will carry oversized dran plugs just for this situation. They are designed to cut new threads the first time they are installed. I think they even carry a double oversize for those guys that don't learn the first time.
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05-23-2003, 05:29 PM
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CC Member
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Join Date: Jan 2002
Location: Northern California,
CA
Cobra Make, Engine: -Sold- Contemporary 427S/C # CCX-3152 1966 427 Med Rise Side Oiler, 8v 3.54:1 Salisbury IRS, Koni's.. (Now I'm riding Harleys)
Posts: 2,567
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$50 for a helicoil??? yikes.. One drill, one tap and one coil?
__________________
michael
A man that is young in years, may be old in hours, if he have lost no time. But that happeneth rarely. Generally, youth is like the first cogitations, not so wise as the second. For there is a youth in thoughts, as well as in ages... Sir Francis Bacon (1561-1626)
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