Oil Breather |
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Oil Breather |
ghia1974 |
Aug 21 2020, 08:44 PM
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#1
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Newbie Group: Members Posts: 14 Joined: 6-August 15 From: New Jersey Member No.: 19,033 Region Association: MidAtlantic Region |
I'm sure this topic has been discussed in the past, but being a newbie not really sure how to find the specific threads. Anyway, I have oil leaking out of my oil breather, not really sure where it is coming from. Definitely not coming from the gasket at the base of the tower. There is a rubber plug where the breather hose should be attached, which I'm sure was routed somewhere in the fuel injection system. Obviously, I have weber's, so not sure what to do with the breather connection. Does the plug on the breather tube cause over-pressure in the system, forcing out oil? Any suggestions/solutions would be appreciated. I removed the dip stick for the picture.
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Not_A_Six |
Aug 21 2020, 09:55 PM
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#2
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Member Group: Members Posts: 110 Joined: 28-November 18 From: North Idaho Member No.: 22,682 Region Association: Pacific Northwest |
I'm sure this topic has been discussed in the past, but being a newbie not really sure how to find the specific threads. Anyway, I have oil leaking out of my oil breather, not really sure where it is coming from. Definitely not coming from the gasket at the base of the tower. There is a rubber plug where the breather hose should be attached, which I'm sure was routed somewhere in the fuel injection system. Obviously, I have weber's, so not sure what to do with the breather connection. Does the plug on the breather tube cause over-pressure in the system, forcing out oil? Any suggestions/solutions would be appreciated. I removed the dip stick for the picture. What year and engine is that? '75? 2.0? Or, is it really a Ghia? Do you have an anti-flashback valve plumbed to the heads? If not, that plug may be the only way to vent crankcase pressure, and your leak could be caused by over-pressure like you said. |
ghia1974 |
Aug 22 2020, 05:22 AM
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#3
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Newbie Group: Members Posts: 14 Joined: 6-August 15 From: New Jersey Member No.: 19,033 Region Association: MidAtlantic Region |
I stepped up in class!
It’s a 73 with 1.7. |
Not_A_Six |
Aug 22 2020, 08:26 AM
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#4
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Member Group: Members Posts: 110 Joined: 28-November 18 From: North Idaho Member No.: 22,682 Region Association: Pacific Northwest |
I stepped up in class! It’s a 73 with 1.7. I *think* that nipple on the oil filler box should be plumbed to the air filter box on that year/model like Bowlsby's diagram for a '70 1.7 below. But, I'd definitely confirm with someone else. (IMG:http://www.914world.com/bbs2/uploads_offsite/bowlsby.net-22682-1598106376.1.jpg) Good luck. |
brant |
Aug 22 2020, 08:33 AM
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#5
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914 Wizard Group: Members Posts: 11,641 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains |
you should remove that plug
your crank case does need to breath, and will cause more leaks (due to internal pressure) if you do not have some type of breather some guys route that into one of the carb air filters (re burn, like the factory) others use a bottle or buy a carb breather box.... that allows the case to breath, and a box to catch the small amount of oil that also escapes with the pressure. |
porschetub |
Aug 22 2020, 02:40 PM
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#6
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Advanced Member Group: Members Posts: 4,706 Joined: 25-July 15 From: New Zealand Member No.: 18,995 Region Association: None |
The cork gasket under the filler will be where your leak is as mentioned you have no venting.
This is what I did on my last customer build,a bit clumsy looking but functional,tested it disconnected from the carb with engine running and just some fumes nothing else. Any oil vapour will separate in the breather box and run downwards,the fumes get sucked into the top of the carb. Use the biggest hose and fittings for max effect (IMG:style_emoticons/default/beerchug.gif) . |
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