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  #16 (permalink)  
Old 08-16-2002, 04:57 AM
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The engine is actually out of a '72 Nova. Does that make a difference?

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Old 08-16-2002, 12:34 PM
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[quote]Is there any reason, which you could guess, for the previous owner to remove this device?<hr></blockquote>

Yes, ignorance. Most think any type of emission device will hinder the performance of an engine where in reality, most optimize performance if operating properly.

The PCV for a performance application should be located at the front of either rocker cover (to pevent the valve from sucking puddling engine oil on hard acceleration) and the inlet breather on the opposite side.

There are two types of systems, open and closed. The closed system uses a fresh air inlet from the engine air cleaner (to prevent blow back into the atmosphere) The open system (pre-1968) uses an open oil filler cap (filter material inside to draw fresh air.

The crankcase must be ventilated, whether using a PCV system, a road draft system or a vacuum system.
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Old 08-16-2002, 12:43 PM
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Its possible that I have that latter type

As you say, "the open system (pre-1968) uses an open oil filler cap (filter material inside to draw fresh air".

I do have oil filter caps on the valve covers. Can I email you a couple pictures to show you what I've got?
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Old 08-16-2002, 01:30 PM
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The pre-'68 engine had an oil filler tube mounted on the intake manifold. Some (the Open system) had a push-on cap that had a metal mesh in it to (chortle) clean incoming air to the engine. We can probably forget all that stuff.
What you need to do is (assuming you've got the valve covers with two holes in one cover and one in the other) is put a PCV valve in the cover with the two holes. Run a vapor hose (probably 3/8") to the carb base. This will draw gases out of the engine. On the other valve cover run a hose to you air cleaner base. This will give you incoming air so you have a constant flow through the engine.
If we have you thoroughly confused, photos might help.
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Old 08-16-2002, 02:41 PM
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Originally posted by MI2600:


[quote]If we have you thoroughly confused, photos might help.<hr></blockquote>

I am good at confusing people...just ask my old lady. :p

Regardless, what MI2600 says is correct. I only mentioned the open system in case you didn't want a second hose cluttering up the engine. A push-in or twist-in filler cap (open) will serve the same purpose.

BTW-I just finished retro-fitting an Edelbrock on a '74 Nove and used the air inlet tube from a later ('89) pickup and it looked fairly stock. It all comes down to how you want the engine to look.
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Old 08-18-2002, 10:31 AM
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Geeezzz, I took the PCV plumbing off to clean up the engine compartment in three cars. (in Calif. you learn to keep the stuff though for retro-law smog making).

Your right, it smells and you also need to keep wiping the valve covers around the vent. Glad I saved that stuff for todays little afternoon task. And now I find a tad bit of performance is added.

Thx for the information!
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