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Unique crankcase [valve cover] vent?

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62Migit

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Hi All,

Some of the fun of this small car is the unique customizations performed by a good-willed previous owner. :smile: I was hoping someone could shed some light on a unique valve cover vent on my 948. The PO drilled a good number of holes in the side of the valve cover and attached this chrome vent. In all honesty, it doesn't look half bad when you open the hood. And it provides a pathway the size of a highway for the valve cover to vent. But it doesn't seal well and allows oil to splash through the holes and drip down the engine. Is it missing a foam element or something else that could help prevent the oil leak?

Thanks!

Mark
 

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The can that attaches to the Timing Chain vent is stuffed full of Steel Wool. Could be what's needed here. Actually a graduated, controlled orifice is what is needed when you plumb a PCV Valve with the 1098 and 1275. You really only need like a 1/16" hole in the oil filler cap to get the right balance of vacuum. Not enough negative pressure and leaks from the rear seal result. IMHO of course.
 
I don't know how functional that is, but I like the look! I would be inclined to check the installation and put it together with a little Permatex and see if that helps. If not, make a plate with a small hole, 1/16" should work as Jim suggests, and add it to this setup.
Rut
 
Mark, Interesting modification. When I did my engine work for my 1275, I was told by Graeme Davies, a local 'old hand' in all things British that the little engines really need/want all the breathing room they can get. He said it would behoove me to take my valve cover, drill a hole in the top, then put in a fitting that would help the crankcase vent. I did so and it did seem to help the little car 'breathe'. The only problem is that I had planned on using one of those very small aftermarket air cleaner-looking things from the local part house to attach to the fitting. But they are 'just a little bit' too tall to fit under the bonnet. I have a small 'redneck-engineered' cover on it, but I am looking for something that will look more fashionable.
 
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