Crankcase Venting

flipflop67 · Posted: Mon Mar 10, 2008 10:58 pm Post subject: Crankcase Venting

I trying to find an answer to venting correctly. If i was to use a vent in the fuel pump block off, would I need to vent at the rocker covers?

Brian M · Posted: Mon Mar 10, 2008 11:01 pm Post subject:

I'd say its worth a shot. Try it. If you start leaking oil out the pulley seal and other places, you need more venting.

My 1915 leaked when I had stock venting. I vented the driver side valve cover and all the issues went away. That where I left it, and it has been good for 40k miles

Glenn · Posted: Tue Mar 11, 2008 5:35 am Post subject:

I would vent the valve covers first.
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The Noof · Samba Member Joined: January 25, 2005 Posts: 4346

I saw an engine that was vented in the fp openeing:it was messy.lots of oil flung around there by the timing components.I think the 3 point (both covers,stock breather) combo works fine.

fccperdiem · Posted: Tue Mar 11, 2008 5:49 am Post subject:

Just to clarify... Are you asking if you should connect the fuel block-off vent to the valve cover vent? If so, bad idea.
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grimace007 · Posted: Tue Mar 11, 2008 6:16 am Post subject:

haha yeah FP plate tpo valve covers doesnt vent anything it just circulates..

my buddy learned that the hard way a couple weeks ago when he got about 1.5qts oil all over his motor shooting out of the dipstick tube Laughing

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veedubcrazy · Posted: Tue Mar 11, 2008 6:59 am Post subject:

I never have liked the idea of venting where a fuel pump block plate is. The gears (cam & dist drive) spin in the direction as to literally sling oil up where a vent tube would be. The pressure then pushed the slung oil up the tubes to the tank.

Pass on the F/P block plate and do the valve covers.
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flipflop67 · Posted: Tue Mar 11, 2008 2:48 pm Post subject:

cheers guys

I was looking at the fuel pump block off from jaycee with vent capacity. I'll stick with my vented covers, I was looking at options, as I've picked up a low km 2110 with covers and FP cover vented.

SkrapMetal · Posted: Tue Mar 11, 2008 4:03 pm Post subject:

I don't see why venting the fuel pump block off would hurt if your lines are sealed correctly. Here's a pic of someone who vented theirs into a CB box so that the excess oil would drain straight down instead of into the valve covers.

Image may have been reduced in size. Click image to view fullscreen.

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lostinbaja · Posted: Tue Mar 11, 2008 4:13 pm Post subject:

It works for me.

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Jimmy111 · Posted: Tue Mar 11, 2008 4:18 pm Post subject:

ok Guys. Dont be silly.... First of all in that photo, the fuel pump plate is being used to drain the oil from the breather. secondly as stated before there is a tremendous amount of oil being sprayed around in there from the gears. Third. that hole is 3 inches from the main crankcase breather which is 20 times the free area. Whats the use? Vent the valve covers and be done with it.

Jimmy111 · Posted: Tue Mar 11, 2008 4:20 pm Post subject:

Jerry. Nice motor! Mine always look like crap.... I like to build them but hate to clean them...

neil68 · Posted: Tue Mar 11, 2008 7:11 pm Post subject: venting

I've been using a Latest Rage "Porsche-style" breather for several years. I have the 1/2 valve cover vented to it, plus a small fabric breather filter on top vented to the atmosphere.

I've since cleaned up the hose (after this photo was taken) with a 90-degree aeroquip connector, to shorten the distance and tidy up the look.

Revs to 7,000 rpms with no mess (oil level near lower dipstick mark with deep sump):

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Glenn · Posted: Tue Mar 11, 2008 7:16 pm Post subject:

Berg breather with just the valve covers vented.

Holes drilled in the front tin so the hoses don't cause air leaks.

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74 Beetle Specs | 74 Beetle Restoration | 2180cc Engine
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