Seized Fill Bolt on Rear Diff

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disallow
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Seized Fill Bolt on Rear Diff

Postby disallow » Wed Aug 14, 2019 4:02 pm

Hey everyone,

So I decided its time to change my diff fluid. Went to remove the upper fill bolt, and can't get it to budge. Even went so far as to get a 10mm hex socket, get it seated in the hex hole really good, and try my breaker bar. It wouldn't go, so I though I'd even try my air impact. No movement. Though now if I let it go on the impact, it does spin inside, so I guess I've rounded the hex a bit now too. Lovely.

Any ideas?

t


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smj999smj
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Postby smj999smj » Wed Aug 14, 2019 6:05 pm

I would get a propane torch and carefully heat the case round the fill plug and then use and air chisel on the edge of the plug to try and break it loose.

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disallow
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Postby disallow » Wed Aug 14, 2019 6:10 pm

Mapp gas too hot?

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Graham W
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Postby Graham W » Thu Aug 15, 2019 3:24 am

Try soaking with some diesel.

I was taught to free seized engines with diesel without having to
strip the heads off. It’s an oil and penetrates.
Just keep soaking for about a week, worth a go.

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smj999smj
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Postby smj999smj » Thu Aug 15, 2019 7:26 am

disallow wrote:Mapp gas too hot?
It'll work, too, as long as your careful. Torque spec is only 25 lb/ft. Somebody must have really cranked on it!

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disallow
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Postby disallow » Sun Sep 01, 2019 8:37 pm

So I managed to get this bolt out yesterday. Used these:

https://www.princessauto.com/en/detail/ ... -p8248486e

Worked perfectly. Got a new plug from Nissan, $18!

Cheers all.

t


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