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Johan_B

Member Since: 20 Sep 2024
Location: Gothenburg
Posts: 24

2008 Defender 110 Puma 2.4 CSW Tonga Green

Axle level and drain plug square size?

I was about to change the oil in the axles yesterday and to my surprise I wasn't able to use a 1/2" drive in the plugs. I could have sworn that I used that on previous Defenders. Is it just a matter of removing all the rust (which I did try to do) or is it another size on these? If so, what size would that be? 3/8" was too small.
Do I run any particular risk if it turns out that these are stubborn? Or is it just to apply whatever torque required?

11th Dec 2024 3:33pm

MarkBrown

Member Since: 03 Oct 2022
Location: Mid Wales
Posts: 466

1983 Defender 110 Other HT Auto Keswick Green

I’m 99 percent sure they take a 1/2 inch extension bar. They’re a tapered thread I think, so I can’t see any harm in putting serious effort into undoing them, but I’m sure if there’s any particular reason not to do this someone will read this and correct me! I’m guessing that trying them when it’s all warm will help. 1983 110 automatic OM606

11th Dec 2024 4:58pm

Ianh

Member Since: 17 Sep 2018
Location: Essex
Posts: 2017

They are a 1/2 inch square drive, so I expect they need a good clean. A little heat around the plug won’t hurt either, nor will a sharp tap with club hammer on the 1/2 inch extension bar.

Just do the fill plug first so you know you can refill once drained. And think about fitting magnetic drain and fill plugs if not already fitted.

11th Dec 2024 6:09pm

custom90

Member Since: 21 Jan 2010
Location: South West, England.
Posts: 20413

I fitted mag plugs to mine just this year, I find usually the old plugs will come out with a standard square drive ratchet, if they are really tough, you can use a breaker bar gently just for a little help to start them off, usually you don’t need to and only used for removing and definitely not refitting.
They are tapered as mentioned, there is a torque setting for them, and the LT230, which is useful to avoid over tightening especially important with the Transfer box not to over tighten because they alloy casing. $W33T $0U7H3RN $UG4R
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11th Dec 2024 7:50pm

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