Differential oil change

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Joined
Aug 12, 2008
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Location
Sri Lanka
Both drain plugs of my BJ 40 were extremely tightened by previous owner & I am unable loosen them. Are they on reverse thread ?

Please advice how to loosen them.
 
Welcome.



24mm socket.

Right hand thread.


Get a six-point 1/2" drive socket, a good 1/2" drive ratchet and a cheater bar; they will come loose. ;)
 
I would suggest a 1/2 inch impact wrench. If not that, 1/2 inch breaker bar with the proper socket. With the breaker bar and an extension pipe, you can get one hell of a lot of torque.
 
Yep. As others have said. It's an ordinary thread so it is undone in the normal torque-direction.

I would use the correct-size 1/2" drive socket making sure I keep it pushed firmly and evenly into the recess (and thus making sure it stays squarely-held on the "plug hex") while I apply the torque.

Note: - You may need to clean the recess first! (There is nothing worse than butchered oil drain/fill plugs.)

And I'm just talking about using the "big bar" as found in "a good quality socket set". (Home-made extensions shouldn't be necessary.)

:cheers:
 
Last edited:
make sure you get the fill plug loosened first!

also you can grind down the socket to get full engagement
 
The leading edge of most sockets are not flat, rather tapered. Grind this flat and you'll gain 1-2mm of engagement.

The proper socket (mine is 23mm) helps. Get the 6-sider that fits exactly.

Make sure the filler is loosened first (causes increased heartrate when that one sticks after draining).
 
X2 on all advice given already.

I started by cleaning the recess that the plug sits in. Shoot with PB Blaster or Deep Creep or something just for good measure.

In my case, I got under the truck and firmly held the socket onto the plug. I put a long pipe "cheater" onto the socket handle. It extended out from under the truck where my helper gently applied the force until it loosened.
 

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