12:05 Garage- ’70 Duster build
I think I've mentioned here the problem with gear oil making its way out the vent on the rearend when I autocross. My initial solution was to add a hose with about 4 loops in it. That proved to only work for a short time. I assume the loops were just holding oil and it was just a matter of time before it started getting pushed out. I searched all ends of the internet looking for a rearend vent catch can for a 70 Duster and guess what, nobody makes one... I can't believe it. So here I am again coming up with a solution to remediate a problem caused by making this 55 year old car do stuff it was never intended to do. You know all that scrap and spare parts you keep in your garage thinking you will need it one day. The day finally came for that stuff.
I had a couple things in mind when it came to designing something. I wanted it to be a simple bolt in and drain back on its own so I don't have an added maintenance item. So here it is. That's a piece of 1/2" pipe I threaded inside with 3/8"NPT. The bottom is a 3/8"NPT to 6AN (way overkill) and the top is a sintered brass vent cap. I stuffed some steel wool inside the pipe to catch the oil. A quick placement of the angle finder on the bolt head that holds the brake line bracket gave me the angle I needed to bend some flat bar to make it level.
Here it is mounted under the car. It's perfectly vertical and above the axle tubes. I used the stock vent hole location in the housing with a bolt I drilled a hole through, then drilled and tapped the head to 1/8"NPT where an 6AN adapter was screwed into. I hope this solves the problem once and for all.
I think I've mentioned here the problem with gear oil making its way out the vent on the rearend when I autocross. My initial solution was to add a hose with about 4 loops in it. That proved to only work for a short time. I assume the loops were just holding oil and it was just a matter of time before it started getting pushed out. I searched all ends of the internet looking for a rearend vent catch can for a 70 Duster and guess what, nobody makes one... I can't believe it. So here I am again coming up with a solution to remediate a problem caused by making this 55 year old car do stuff it was never intended to do. You know all that scrap and spare parts you keep in your garage thinking you will need it one day. The day finally came for that stuff.
I had a couple things in mind when it came to designing something. I wanted it to be a simple bolt in and drain back on its own so I don't have an added maintenance item. So here it is. That's a piece of 1/2" pipe I threaded inside with 3/8"NPT. The bottom is a 3/8"NPT to 6AN (way overkill) and the top is a sintered brass vent cap. I stuffed some steel wool inside the pipe to catch the oil. A quick placement of the angle finder on the bolt head that holds the brake line bracket gave me the angle I needed to bend some flat bar to make it level.
Here it is mounted under the car. It's perfectly vertical and above the axle tubes. I used the stock vent hole location in the housing with a bolt I drilled a hole through, then drilled and tapped the head to 1/8"NPT where an 6AN adapter was screwed into. I hope this solves the problem once and for all.