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Unread 09-23-2013, 02:25 PM   #1
efm-7
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2013 JK Wrangler 
 
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Diff cover removal via compressed air?

Hi,

I'm going to be doing an oil change on my Dana 30 - and before I risk scoring up the mating surface using a prying tool, I was wondering if I could try to separate it via compressed air and a blow gun pressed up against the filler hole after the oil is removed via suction...

Is there any risk to doing this other than flat out not working?

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Unread 09-23-2013, 03:06 PM   #2
biffgnar
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Way more trouble than its worth. Just pry it off. Scoring of diff faces gets over blown. You're unlikely to score it and even if you do a little RTV is squishy. It fills in things like that.
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Unread 09-23-2013, 05:11 PM   #3
jp360cj
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If the goal is simply changing the diff oil and you removed the oil with suction, why would you need to worry with the cover? Just fill it back up.

I would be surprised if you could even pressurize the diff to get the cover off. Seals would probably blow first then there goes your pressure.

I usually just hit mine with a rubber mallet. breaks it loose enough to easily pry it the rest of the way off.
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Unread 09-23-2013, 06:52 PM   #4
efm-7
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I recently had a regear so I want to do a thorough drain to catch any metal particles.

I guess getting the cover off the conventional way might not be as difficult as I'm expecting. Now I'm more worried about getting it sealed up again lol
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Unread 09-23-2013, 11:43 PM   #5
jp360cj
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Just clean the old gasket/rtv off the housing and cover then reapply before installing. I use rtv because I haven't had any problems with it leaking like the cheap paper gaskets did.
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