Valve covers with Ventilation - Team Camaro Tech
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post #1 of 5 (permalink) Old Sep 6th, 03, 06:13 AM Thread Starter
Join Date: Nov 2002
Posts: 189

On my 400sb I have a pvc valve going to the base of the carb and on the other side I have a plug with a breather. I just realized that the valve cover is not open to the breather. Is it supposed to have vents on both sides? Or is the pvc valve on the one side sufficient?
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post #2 of 5 (permalink) Old Sep 6th, 03, 02:15 PM
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Are you sure that there isn't just a baffle under the breather. You definitely need the valve cover open to the breather also. It may just be a baffle to keep oil from getting into you breather that you are seeing.If there is a hole in the valve cover, I bet it's open to the valve area.

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post #3 of 5 (permalink) Old Sep 23rd, 03, 07:33 PM Thread Starter
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Well, it looks like there is a baffle, but won't I see at least a bit of smoke coming out if it was open? I will have to pull the cover and take a better look
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post #4 of 5 (permalink) Old Sep 23rd, 03, 08:55 PM
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if you are seeing smoke from the valve covers, it's time for a rebuild. besides, the pcv valve is sucking all the fumes the other way, so unless you have excess blowby, you wouldn't see anything out of that hole anyways. with the breather out, pull the pcv valve out of the other valve cover with the engine idling and see if anything comes out the hole with the breather then.

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post #5 of 5 (permalink) Old Sep 24th, 03, 11:39 AM
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PCV system off of one side,with a breather on the opposite side works for me.Be sure if your valve covers have a baffle, your push in type breather or pcv valve does'nt bottom out on the baffles when installed.This will cause some serious crankcase vent problems.I had this happen on my last engine.Pushed the dip stick out and oiled the engine up a little.

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