Engine Oil Drain Plug

mantta

mantta

Senior Member
Can anyone tell me what thread size is on the oil drain plug? I just drained the oil and went to put the plug back in and it would not tighten so, I took it back out and the threads on the plug were almost all gone! (repo) The threads in the pan look okay and I thought I would chase them with a tap first and install a new plug. My thread pitch gauge says 24 TPI and I am guessing it is 3/4" X 24 TPI. Hope this can be verified. Thanks!
 
I have ordered a new drain plug. My question is what is the thread size so I can chase the threads in the pan with a tap.
Thanks
 
This is what I use:

Magnetic Oil Drain Plug:
Same as the regular oil drain plug except it has a magnet to grab any foreign metal objects floating in the oil that can cause damage. U.S.A.
A-6730-M $3.75 / ea.


A6730M-6484.jpg

(From Snyder's Catalog)
 
mantta said:
Can anyone tell me what thread size is on the oil drain plug? I just drained the oil and went to put the plug back in and it would not tighten so, I took it back out and the threads on the plug were almost all gone! (repo) The threads in the pan look okay and I thought I would chase them with a tap first and install a new plug. My thread pitch gauge says 24 TPI and I am guessing it is 3/4" X 24 TPI. Hope this can be verified. Thanks!
Click to expand...
Year of engine?? 3/4-24
 
Last edited:
You could use a plumber's brush or some such round wire brush to clean the threads. I'm usually not a fan of using a tap because it might remove good metal. You could also use the thread gauge and just spin it around the threads to see if it pulls out some stipped thread. A fine pick such as a dental pick could also be used.
 
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