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What is this?


malder

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It is a positive crankcase vent.It goes from that piece you showed to the big vent tube that comes out of your block,under the dist.Its job is to suck out the gas/vapor that build up in the block when the car is cold.My understanding is that not using it will cause gunk to build in your engine and reduce the lube properties of the oil( as gas mixed with oil is).It sucks that vapor out and reburns it.

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It's even of more value than you might think. Engines, our engines in paricular, run better when the crankcase has a negitive pressure, the more the merrier. The PCV system gives us enough. Some may contend that the "Dirty air" from the PCV and the valve-cover vent spoils the burn. But, I beleive it would only affect performance on a tired engine with lots of ring blow-by.

So hook it back up. The hose for this is very specific, as it has a larger diameter one end, where it connects to the engine vent tube (below the exhaust port of #1)

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Oh. that's right. sorry, it does go to the breather tube in the block. It's been so long since I've had that set up. I have the little air filters on mine. One for the block breather and one for the valve cover.

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