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Mike924 · Joined: 12 Aug 2004 Posts: 2601 Location: IoW UK

I've recently noticed that there seems to be oil weeping from the filler cap (making a mess of my cam cover!

)

A recent post from Ozzie indicated that this could be due to a blocked PVC, which (hopefully) can be easily cleaned out. Only problem is, I don't know what I'm supposed to be looking for.

Can any of you guys help?
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1985 Porsche 924 'Lux', Kalahari Beige (my ex)
1993 Porsche 968 Coupe, Midnight Blue, 6 spd

'There is no substitute for a little grease under your fingernails.' - Chrenan, 924board.org

Mike924 · Joined: 12 Aug 2004 Posts: 2601 Location: IoW UK

Ooops! I meant PCV

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1985 Porsche 924 'Lux', Kalahari Beige (my ex)
1993 Porsche 968 Coupe, Midnight Blue, 6 spd

'There is no substitute for a little grease under your fingernails.' - Chrenan, 924board.org

Diesel · Joined: 03 Nov 2002 Posts: 1061 Location: Ellington,CT

Left rear side of lower engine block. It looks like a dome with a large diameter hose coming out of it. I like to pop it right off the side of the block and soak it in GM Top Engine cleaner. After that a good spritzing of carb cleaner and it's like new.
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Dan Flanagan--2002 VW Jetta TDI, 83 Mercedes 300D,83 Mercedes Euro-240D

Smoothie · Posted: Wed Feb 08, 2006 12:28 am Post subject:

Actually, PVC is polyvinylchloride. PCV is positive crankcase ventilation (aka- the engine breather system) - it vents the cylinder blowby back to the intake. Back in the old days, it was just released to the atmosphere, but since pollution control became important, manufacturers have been routing these gasses back to the intake. For a 924NA, the system consists of a metal breather fitting that's mounted through the engine block below the intake manifold toward the rear of the engine. You should find a line from there to air filter box. The metal breather can be come clogged as can a small orifice that's installed within the line more toward the airbox end.
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"..it's made in Germany. You know the Germans always make good stuff."

'82 924T, US version, dark green metallic, 5 speed Audi 016G gearbox

Mike924 · Joined: 12 Aug 2004 Posts: 2601 Location: IoW UK

Thanks, Dan.

I'll try that - sounds messy though...

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1985 Porsche 924 'Lux', Kalahari Beige (my ex)
1993 Porsche 968 Coupe, Midnight Blue, 6 spd

'There is no substitute for a little grease under your fingernails.' - Chrenan, 924board.org

Mike924 · Joined: 12 Aug 2004 Posts: 2601 Location: IoW UK

Chrenan · Joined: 15 Jan 2003 Posts: 3903 Location: Canada

How old is your oil filler cap? You can replace it with a new VW one for cheap, it cured my oil leak onto the cam cover.
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1987 951 - M193 Version for Japan

tj924 · Posted: Wed Feb 08, 2006 6:26 am Post subject:

Mike924 · Joined: 12 Aug 2004 Posts: 2601 Location: IoW UK

Mike924 · Joined: 12 Aug 2004 Posts: 2601 Location: IoW UK

Ozzie · Posted: Wed Feb 08, 2006 6:02 pm Post subject:

My hose broke when I tried to remove it.
A new hose from the dealer here was $120.
I replaced it with a hose that had no orifice, put a rubber bung (plug) in one end far enough so I could fit the hose, then drilled the plug.
Cost $10.
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Porsche 924 1984 (UK import) NA
Its AUTO and its BLACK
Montego Black on black/red
Engineer of Electro/Mechanical Systems Maintenance