Certainly, you can build a crankcase breather vent tube catch-all. The following is the bill of materials and the Geno’s Garage instructions which were written after someone on the Geno’s Garage staff spent a fair amount of time researching, tinkering and testing.
o 1 - 6’ x ¾” heater hose
o 1 - 1’ x ¼” vent tube
o 1 - ¾” x ¾” plastic male coupling (24-valve engines)
o 1 - ¾” x 11/16” brass fitting (12-valve engines)
o 1 - ¾” x 1” male barb
o 3 - ¾” hose clamps
o 1 - 1” drill bit
o 1 - ¾” x 45-degree turn down
o 1 - Summit Racing Catch-all part number SUM-G1504, price $29. 99 + shipping and handling
o Epoxy
With the exception of the Summit Racing Catch-all, most parts can be found at your local hardware store. Finding the 45-degree turn down is important as the crankcase vapors did want to come back out of the breather cap on our test model. You can make a cost-effective, non-critical, choice to use off-the-shelf heater hose (and possibly replace in five years as suggested). We will research Tigon/Viton type ¾” hose. In the absence of instructions, you’ll have to spend time “engineering” the kit (but we’ve provided the Geno’s Garage instructions below).
The product is available through Geno’s Garage, but feel free to use your own resources to build your own. You decide the value of your time.
Installation Instructions:
Your Catch-all can be mounted in any vertical location. Because of its 13” overall length, we chose the front, driver’s side of the plastic fender well to mount the Catch-all.
Note: Inside the Catch-all, the breather fumes are directed 45o downward. Even with the fumes directed downward, experience has proven that the Catch-all breather needs to be vertical or oil will collect/seep out of the breather.
·For access to the fender well, we suggest turning the steering wheel all of way to the left.
·Vertically test fit the Catch-all to the fender well. The top of the breather should be positioned ½” from the bottom of the back/bottom side of the battery box.
·With a ½” clearance at the top, the drain valve should be barely visible under the bottom of the plastic fender well. As there is a small plastic lip at the bottom of the fender well, you will need to cut it off to allow the Catch-all to flush mount to the fender well.
·With the Catch-all in its temporary position, mark the fender well and drill two 3/8” holes (the center line distance between the holes is 3 ½”) through the plastic fender well for mounting.
·For 1998. 5 and up trucks/24-valve applications, attach your existing ¾” breather tube to one side of the male-to-male hose barb. Attach the ¾” hose supplied in the kit to the other side of the barb. Tighten the hose clamps. Test fit and route the ¾” hose to the Catch-all and assembly. Cut hose to length and press on to the hose barb. Tighten the clamp.
·For 1994 – 1998. 5/12-valve applications, the breather tube is 11/16”, an odd size. The transition from the 11/16” breather tube to the ¾” hose supplied in the kit is done with a brass fitting. Insert the fitting into the ¾” hose first as you will have to push/stretch (a soapy solution will help) the hose to insert the fitting. The fitting should slip easily into the 11/16” breather tube. Tighten the clamps. Test fit and route the ¾” hose to the Catch-all assembly. Cut hose to length and press on to the hose barb. Tighten the clamp.
·Install the kit to the fender well with the two 7/16” bolts supplied with the kit.
·Important final note: Double check your routing of the ¾” hose to assure there are no kinks in the hose. Kinks to the hose would not allow for engine breathing and could cause seal leakage.
Maintenance Instructions:
Drain the Catch-all at every oil change. Oil discharge should be minimal. At every other oil change, we suggest you clean the breather using a Simple Green solution and water. As a precaution against a clogged breather, we left a small ¼” vent tube at the top of the breather.
Hope this helps those of you wanting the purchase a kit and those of you wanting to build your own.
Robin
Geno's Garage