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Valve cover vents

PostPosted: Tue Jul 26, 2011 7:43 am
by yellow73
What do you guys think about valve cover vents. I installed them on my 1915 to help with heat and blowby. Everytime I look at them one has fallen off or touched the heater tubes and melted, this is letting dirt and crap in my engine. Are they really worth it or should I just put sealed valve covers back on?

Re: Valve cover vents

PostPosted: Tue Jul 26, 2011 9:46 am
by vdubjim
Hose clamps?

Re: Valve cover vents

PostPosted: Tue Jul 26, 2011 1:44 pm
by yellow73
I have attached with hose clamps. There isn't much room between the valve cover, cylinder cover and heat tube. So there is a sharp angle and not much hose clamp. I really do not want to cut my chrome cylinder cover to run them straight up. I had it that way and it was just as hard to get the clamp on from the top.

Re: Valve cover vents

PostPosted: Thu Jul 28, 2011 1:57 am
by Joe-405
I dont see any vents in that pis sir or else i could help you, all of my stuff has them.

Re: Valve cover vents

PostPosted: Thu Jul 28, 2011 7:42 am
by yellow73
Joe-405 You said you have them on all you stuff. The question was are they worth it. Did you see any difference in overheating, blow by? In other words why do you have them on all you stuff? I will take some pictures from the back and post them tomorrow. I just put that pic on there to show Jim I didn't want to violate my chrome.

Thanks guys

Re: Valve cover vents

PostPosted: Thu Jul 28, 2011 8:48 am
by gimpy60
that chrome will cause more overheating than installing the vents would overcome. chrome won't get ya home, but it sure looks good sittin' onna side of the road!!!!!!!!!!!! :lol:

Re: Valve cover vents

PostPosted: Thu Jul 28, 2011 4:45 pm
by vdubjim
Ya, vents won't help with overheating. How do you know you are? Tried the obvious, turn timing down, fatten up carb.
Far as blow by, what do you have?

Re: Valve cover vents

PostPosted: Thu Jul 28, 2011 7:29 pm
by Joe-405
yellow73 wrote:Joe-405 You said you have them on all you stuff. The question was are they worth it. Did you see any difference in overheating, blow by? In other words why do you have them on all you stuff? I will take some pictures from the back and post them tomorrow. I just put that pic on there to show Jim I didn't want to violate my chrome.

Thanks guys



Honest answer was that it kept blowing oil and killing the gaskets. AND the fact that the engine builder told me too.

Re: Valve cover vents

PostPosted: Thu Jul 28, 2011 8:00 pm
by yellow73
Jim just got it back together. It is 1915, center line webber (new this build), engle 110 cam (new this build), 009 distributer, stock heads. I put new rings, jugs and cylinders. I also corrected the deck height. Matched the volume of the cylinder heads with the deck height to get correct compression, utilized aircooled.net Engine calculation and conversion tools. I think the blow by was mostly the overheating from the high compression and when I rebuilt it last time I didn't replace the rings. I will know soon enough when I get it in and drive it for a while. I hope to have it at one of the next meetings.

My question is are the valve cover vents worth putting back on?

Re: Valve cover vents

PostPosted: Fri Jul 29, 2011 5:52 am
by gimpy60
what can it hurt :?: :?: :?:

Re: Valve cover vents

PostPosted: Fri Jul 29, 2011 8:34 am
by vdubjim
You'll have to try or not and see what the engine does.

Re: Valve cover vents

PostPosted: Fri Jul 29, 2011 9:32 am
by Fireplug77
It is always better to keep your engine vented. Keeps from blowing out oil, and gaskets.

Re: Valve cover vents

PostPosted: Fri Jul 29, 2011 11:55 am
by vdubjim
Just got the pic to work.
Might that low location tend to blow oil out easier than if on top?

Re: Valve cover vents

PostPosted: Fri Jul 29, 2011 1:22 pm
by vwracerdave
If you are never reving above 6000 RPM you probably don't need to vent your valve covers. If you are not leaking any oil out of the back of the pulley you probably don't need to vent the valve covers. You do need to vent the oil filler on all VW engines.

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