Differential Mod using OEM breather valve - Toyota 4Runner Forum

Mack1611 · 07-31-2021, 07:49 PM

Not sure if this has been posted before, but I realized today that you can reuse the breather valve off of the differential. You can thread the valve into a 5/16 ID fuel line for a nice tight fit.

aabottom · 07-31-2021, 08:06 PM

Cool

Saker · 07-31-2021, 08:27 PM

Quote:

Originally Posted by Mack1611

Not sure if this has been posted before, but I realized today that you can reuse the breather valve off of the differential. You can thread the valve into a 5/16 ID fuel line for a nice tight fit.

Yes sir, been posted numerous times in other threads.

Mack1611 · 07-31-2021, 08:48 PM

Quote:

Originally Posted by Saker

Yes sir, been posted numerous times in other threads.

Well crap... missed that! I could have saved a few bucks because I figured that out while I was cleaning up.

Saker · 07-31-2021, 08:59 PM

Quote:

Originally Posted by Mack1611

Well crap... missed that! I could have saved a few bucks because I figured that out while I was cleaning up.

I hear you.
If you put a filter on it where the diff stays at ambient pressure, your diff will not suck in water like when that valve is closed.

CajunMikeR · 07-31-2021, 09:27 PM

From what I understand, the factory piece acts more like a check valve than a true bidirectional breather. For that reason, I upgraded up a breather that's mounted high up under my hood, all of the lines (front & rear diff, transfer case, and E-locker breathers) are all tied in. I used some heat shrink, a couple of hose barb connectors, and a few shark bite fittings to make it all work... in addition to the $40 Amazon knock off version of the ARB breather kit.

jerbrun0515 · 10-22-2021, 01:14 PM

Quote:

Originally Posted by CajunMikeR

From what I understand, the factory piece acts more like a check valve than a true bidirectional breather. For that reason, I upgraded up a breather that's mounted high up under my hood, all of the lines (front & rear diff, transfer case, and E-locker breathers) are all tied in. I used some heat shrink, a couple of hose barb connectors, and a few shark bite fittings to make it all work... in addition to the $40 Amazon knock off version of the ARB breather kit.

For the barbed union fittings did you use 8mm for size? Link to it?

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CajunMikeR · 10-26-2021, 10:00 AM

Quote:

Originally Posted by jerbrun0515

For the barbed union fittings did you use 8mm for size? Link to it?

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Just now seeing this, sorry.

I just took a small piece of the tubing to Lowe's and found what fit tightly. Then when I installed I heated the tubing, forced it on, allowed it to cool, then put heat shrink over it to give another layer of protection against water intrusion.

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