Pagoda SL Group
W113 Pagoda SL Group => Drive train, fuel, suspension, steering & brakes => Topic started by: Rick Katucki on January 04, 2019, 19:38:46
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The 230SL I am "resurrecting" has a piece of hose that runs from the top of the valve cover and over the side of the motor. It is open to the atmosphere. There is a rigid tube that is plugged on both ends and looks to have run from the valve cover to a fitting on the intake manifold at the throttle body. I have not yet addressed this issue but assume that the crankcase breather hose should be connected to the intake manifold via the abandoned (plugged) tubing. I assumed that the the breather was disconnected because it was somehow interfering with the engine. There is not an obvious amount of blow-by at the open end of the breather tube when the engine is running nor oil smoke at the tailpipe. [/size]
BUT, yesterday I saw pictures of a 64 230SL on bringatrailer.com. Photos of the engine clearly showed the same crankcase venting modification as I have on mine. Anyone know if this is an 'accepted' modification for that year model?
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[ I am just reposting the original question in full size font / appears to be an html glitch ]
The 230SL I am "resurrecting" has a piece of hose that runs from the top of the valve cover and over the side of the motor. It is open to the atmosphere. There is a rigid tube that is plugged on both ends and looks to have run from the valve cover to a fitting on the intake manifold at the throttle body. I have not yet addressed this issue but assume that the crankcase breather hose should be connected to the intake manifold via the abandoned (plugged) tubing. I assumed that the the breather was disconnected because it was somehow interfering with the engine. There is not an obvious amount of blow-by at the open end of the breather tube when the engine is running nor oil smoke at the tailpipe.
BUT, yesterday I saw pictures of a 64 230SL on bringatrailer.com. Photos of the engine clearly showed the same crankcase venting modification as I have on mine. Anyone know if this is an 'accepted' modification for that year model?
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There were two types of breathers on the 230, one was a metal fixture from the rocker cover and the second was a rubber one. See photos.
The metal fittings were the earlier ones mine is a ‘65 and still had it then they went to the rubber connection through the remaining years.
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This is a close up of the later solution Garry describes.
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..and here's an earlier one; production date of my 230sl is Apr '64
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Thank you for the photos. I will gather the parts and set it up correctly. Curious to know how it will affect the engine as I don't know why it was altered in the first place.
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You ay want to read this passage on the venting: https://www.sl113.org/wiki/Engine/Lubrication#ValveCover