Draining gearbox oil

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Morrisminormo
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Draining gearbox oil

Postby Morrisminormo » Wed May 21, 2014 6:34 pm

Hi

I want to drain and replace my gearbox oil, but the drain bung is seized solid! I don't want to drill out and helicoil it at this time. Is their another way to get the oil out? Remove plunger bung?

Cheers
Last edited by Morrisminormo on Wed May 21, 2014 6:45 pm, edited 1 time in total.
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philthehill
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Re: Draining gearbox oil

Postby philthehill » Wed May 21, 2014 6:39 pm

Put a suitable Stilson wrench on it and it should shift.


Morrisminormo
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Re: Draining gearbox oil

Postby Morrisminormo » Wed May 21, 2014 6:44 pm

philthehill wrote:Put a suitable Stilson wrench on it and it should shift.
Hi

Done that, the bung now is about 3 sizes smaller than it was 8)
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philthehill
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Re: Draining gearbox oil

Postby philthehill » Wed May 21, 2014 6:55 pm

I am very surprised as a proper Stillson wrench with teeth in good condition should make the job very easy because as you pull on the handle the jaws will grip the stub of the drain plug tighter. I have always used a Stillson wrench on very tight gearbox drain plugs in the past and they have always come loose.
As an aside Mole grips are useless for this task.


mike.perry
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Re: Draining gearbox oil

Postby mike.perry » Wed May 21, 2014 11:39 pm

A long straw though the filler hole and suck :x Or maybe one of those drain unblocker pump thingies
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Blades
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Re: Draining gearbox oil

Postby Blades » Thu May 22, 2014 1:32 pm

Morrisminormo

May I ask a stupid question, are you turning the drain plug the right way

Nick
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philthehill
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Re: Draining gearbox oil

Postby philthehill » Thu May 22, 2014 2:06 pm

I did wonder but thought it prudent not to ask.


Morrisminormo
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Re: Draining gearbox oil

Postby Morrisminormo » Thu May 22, 2014 2:34 pm

:wink: unless it's left hand thread I'm going the correct way :wink:
Blades wrote:Morrisminormo

May I ask a stupid question, are you turning the drain plug the right way

Nick
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les
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Re: Draining gearbox oil

Postby les » Thu May 22, 2014 4:16 pm

Can be disorientating laying under a car to initially know which way to turn---however the question has been answered!


StaffsMoggie
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Re: Draining gearbox oil

Postby StaffsMoggie » Thu May 22, 2014 7:12 pm

I did have this problem with a Rover P6 sump plug. The plug was well rounded off and all stillsons and mole grips were doing was shaving more metal off the plug. I ended up cutting a slot in it and using a spanner, edge on, to turn it out.

Morrisminormo
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Re: Draining gearbox oil

Postby Morrisminormo » Thu May 22, 2014 9:58 pm

StaffsMoggie wrote:I did have this problem with a Rover P6 sump plug. The plug was well rounded off and all stillsons and mole grips were doing was shaving more metal off the plug. I ended up cutting a slot in it and using a spanner, edge on, to turn it out.
That's exactly what's happened to mine! I have put oxyacetylene on it to heat it up and it's still solid! I topped the gearbox up ( only took 200ml so not that low ) I will drill the bung out when I remove the box to overhaul it at a later date :D
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bmcecosse
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Re: Draining gearbox oil

Postby bmcecosse » Thu May 22, 2014 11:12 pm

Wise move - leave well alone. Or you may end up with a cracked casing......
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