2.0 Crank & Head Venting Issues |
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2.0 Crank & Head Venting Issues |
tjtryon |
Oct 17 2016, 03:56 PM
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#1
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Newbie Group: Members Posts: 20 Joined: 15-June 16 From: Indianapolis Member No.: 20,112 Region Association: None |
Car: 1973 2.0 with dual Webbers
Issue: I have a leak from the drivers side valve cover, and poking around, I know my crank & head venting is not correct, which may be what's causing issues. I wanted to fix this first, before I change the valve cover gasket. I have what I believe is the CB breather box already on the car. It has a hose connected to the oil filler area, one to the fan shroud, and one that is venting to atmosphere. I have a hose port at the base of the carb intake manifold on both sides, that does seem to vent air out. I assume these are the head or valve cover vents, but am not sure. Additionally, nothing in the system seems to pull vaccuum, unless the fan shroud vent does so. I have 3 main questions: What are the hose ports at the base of the carb intakes (front of intake on drivers side, rear of intake on passengers side)? What's the correct routing of the hoses? Where does the system pull a vaccuum? Many thanks in advance! |
falcor75 |
Oct 17 2016, 11:17 PM
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#2
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Senior Member Group: Members Posts: 1,579 Joined: 22-November 12 From: Sweden Member No.: 15,176 Region Association: Scandinavia |
Wait.....your breather bottle is connected to the port on the fan housing?
That port is blowing fresh air and originally used for venting the carbon cannister ontop of the fuel tank. If thats connected to the bottle and the bottle to the crank case port you are basically blowing air into the crank case. (or at best preventing the crank case to vent into the bottle) Remove the hose to the fan housing and connect it to the carbon cannister or plug it. Connect the crank case port on the oil filler tower to the breather bottle. Connect hoses to the head/valve cover vents, join them with a Y-fitting and pull the joined line to the breather bottle. Put a small air filter on the third connection of the breather bottle for peace of mind. Hopefully this is correct otherwise I'm sure someone will chime in. |
tjtryon |
Oct 18 2016, 06:28 AM
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#3
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Newbie Group: Members Posts: 20 Joined: 15-June 16 From: Indianapolis Member No.: 20,112 Region Association: None |
Wait.....your breather bottle is connected to the port on the fan housing? That port is blowing fresh air and originally used for venting the carbon cannister ontop of the fuel tank. If thats connected to the bottle and the bottle to the crank case port you are basically blowing air into the crank case. (or at best preventing the crank case to vent into the bottle) Remove the hose to the fan housing and connect it to the carbon cannister or plug it. Connect the crank case port on the oil filler tower to the breather bottle. Connect hoses to the head/valve cover vents, join them with a Y-fitting and pull the joined line to the breather bottle. Put a small air filter on the third connection of the breather bottle for peace of mind. Hopefully this is correct otherwise I'm sure someone will chime in. This is exactly the info I am looking for. My other question, are the valve cover vents the ports at the base of the carb intake manifolds on both the driver's & passenger's side? They come off at 45° angles? |
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