Edelbrock oil filler cap

[LarryH]

So i'm in the T-Bucket cruising down the freeway and i notice what looks like a fine mist of oil on my windshield. I'm thinking this ain't so good. So i hit the next off ramp, pull into a parking lot, jump out and immediately notice the oil filler tube cap has vibrated almost completely off (Edelbrock Performer EPS intake with the stock Edelbrock cap). So i shoved it back on and drove on home (about 5 miles). By the time i got home it had almost vibrated off again. I grabbed the cap off of another new in the box EPS intake i had ordered a few days ago and tried the cap on the T-Bucket. It fits a little better but i can tell after a few freeway miles i'll probably have an oil soaked windshield.

Is their some kind of secret to making those things fit? Throw them away and buy something else? Duct tape? A BFH?

 

[Mike]

Are you using a PCV valve? Or a road draft tube?

I'm betting you're not using either one. I've even seen set-ups trusting a single breather cap to vent the crankcase actually push dipsticks up out of the tubes. PCV valves are not the most beautiful things in the world, but if you use one, the low pressure area it creates in the crankcase will draw air in through the breather, rather than having crankcase pressure trying to shove your breather off.

Guys using tunnel rams can hide a Chrysler-style oil separator in the bed plate of the intake (using a baffled grommet) and can sneak the hose up into the plenum from there. I don't recommend trying to add ventilation to the front or rear of the valve covers, as you can flood your choice of vent during hard acceleration or braking.

 

[LarryH]

Are you using a PCV valve? Or a road draft tube?

I'm running a PVC valve on one valve cover and a breather on the other. The cap has a piece of what i'm guessing is spring steel fingers to wedge the cap on. With the engine not running using one finger underneath the cap you can you can knock the cap almost completely off.

 

[Mike]

Did you say you had another intake package on hand? Check how the cap fits on that tube. There should be more resistance than that. I've seen a couple different methods of using the spring steel on the cap, but you might be able to give it a tweak to get a better fit.

If you're running the PCV/breather combination on your valve covers, there's always the option of pulling the tube and popping a freeze plug into its place.

 

[LarryH]

I tried the cap from the other manifold. It fits a little better but not much. I tried tweaking the ears on the original cap but that didn't really help.

No way i'm pulling the tube and capping it. The filler tube is the reason i bought that particular manifold.