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What size is pan oil drain bolt?

Old Apr 1, 2005 | 12:38 PM
  #1  
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What size is pan oil drain bolt?

I'm going to pick up a spare oil drain plug and fit it as a return from a bypass filter but I don't know the exact size/thread to pick up. Anybody Know?
Old Apr 1, 2005 | 01:53 PM
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Re: What size is pan oil drain bolt?

It takes a 15mm wrench/socket, if that helps at all?? I couldn't tell ya the actual size of the bolt?
Old Apr 1, 2005 | 02:10 PM
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Re: What size is pan oil drain bolt?

The threads are ½-20.
Old Apr 1, 2005 | 02:18 PM
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Re: What size is pan oil drain bolt?

14mm on LT1 cars
Old Apr 3, 2005 | 01:33 PM
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Re: What size is pan oil drain bolt?

Go to a car store, they can look them up and sell them, well they were able to for my 94 3.4L.
Old Jun 21, 2005 | 07:44 AM
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Re: What size is pan oil drain bolt?

Now that I finally know the answer to this question, I'll pass it on. 12mm x 1.25. As it turns out 1997 is the first year for this from the previous 1/2 x 20 and it stayed the same through 2000.
Old Jun 21, 2005 | 08:20 AM
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Re: What size is pan oil drain bolt?

Originally Posted by JohnD
Now that I finally know the answer to this question, I'll pass it on. 12mm x 1.25. As it turns out 1997 is the first year for this from the previous 1/2 x 20 and it stayed the same through 2000.
Looks like the change to the metric plug was made during the 1997 model year, so it could have had either one.
Old Jun 21, 2005 | 11:31 AM
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Re: What size is pan oil drain bolt?

I like it when everybody is right!
Old Jun 21, 2005 | 01:11 PM
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Re: What size is pan oil drain bolt?

Originally Posted by JohnD
I like it when everybody is right!
That does not happen very often.
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