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Old 04-03-2008, 08:33 AM
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Default Fuel and diff. fluids containment

During road racing I seem to loose fluids from the vent tubes of the differential and fuel filler tube.
Differential- I have the vent tube running as high as possible with a couple of sweeps in it but I still get oil coming thru the tube and leaking all over the underside. Any suggestions on how to capture the oil and still allow the vent to work?
The fuel- I have a lemans gas cap and have used an expandable rubber tappered plug for the filler tube but the fuel comes up the vent tube and leaks out thru the gaskets onto the paint around the lemans cap. Any solutions?
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Old 04-03-2008, 09:13 AM
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You can put a small breather tank on the diff vent. Mount it up high, possibly in the trunk.
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Old 04-03-2008, 09:46 AM
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Quote:
Originally Posted by xlr8or View Post
You can put a small breather tank on the diff vent. Mount it up high, possibly in the trunk.
I agree - sort of a puke tank for the rear. I would be hesitant to put it in the trunk, however, as diff fluid reeks terribly, especially so when hot.
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Old 04-03-2008, 09:58 AM
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Great ideas already, mount the diff puke tank on the outside wall of the trunk to keep smell out of trunk. I have had good luck installing a canned (metal with a nipple on the in/0utlet) type fuel filter in the vent tube. Keep it as vertical as possible to promote slosh to return to tank.
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Old 04-03-2008, 10:33 AM
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Where is the vent tube attached in relation to the center section?
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Old 04-03-2008, 12:13 PM
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All good stuff but if you can put a 4 to 6" loop in the hose going to the vertically mounted puke tank. On a CR II car it is very easy-and room for it- on the back wall of the trunk, outside of the trunk.

Fuel: with another neck? Where is the 90' overflow valve? Should, if it doesn't go by the seal on the cap should run into the overflow/vent and return to the tank.

Location of the diff vent- about an inch tall usually found on the top of the right (?) axle housing past the pumpkin. What is being forced out is the oil that is to supply the axle bearings.

You guys are driving hard.....coool!
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Old 04-04-2008, 05:33 PM
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Yup, put a loop in both of them - cheap to try. You could also put a one way check valve in the vent tube. I have a custom fuel cell from Fuel Safe in my car. The filler neck has a flapper valve and the vent has a check valve built into the cell.
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Old 04-06-2008, 08:18 AM
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DV, what is a 90' overflow valve? I purchased my CR in '99. See attached photo's of filler and vent tube.
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Old 04-06-2008, 09:45 AM
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dvcobra,
My mistake, your car or any car using a "LeMans" gas cap does not have an overflow tube. (The small caps do.) Theoreticaly you could drll out a hole next to the opening, and use a 1/4 pipe thread to tap in using a 90' 1/4" pipe fitting-bronze and either let the over flow run to the Ground, (EPA forgive me.) or you can run the line off the 90' and splice it high into your filler with an anti flow valve. (Only allows fule to go one way.) Your Lemans cap should have a large waser underneath the lid encased in rubber. The center of this washer is held on with an adjustable bolt that is for adjustment. Could be to tight not allowing the gasket to come down tight on the flange or base of the filler?
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