PCV rattle

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May 25, 2007 | 12:43 PM

coinwasher

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From: Glen Allen (Richmond) Virginia

PCV rattle

The PCV valve on my 427 stroker has this annoying rattle. The engine is vented properly and this only happens at idle. Any ideas?

May 25, 2007 | 12:57 PM

Roughrider

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Joined: Mar 2007

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From: Frederick Maryland

A good PCV valve should rattle when you shake it in your hand. If yours is as loud as you say, try a different brand PCV and see if it still does it.

May 25, 2007 | 01:18 PM

Easy Mike

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From: Southbound

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Quote:

Originally Posted by Roughrider

A good PCV valve should rattle when you shake it in your hand...

May 25, 2007 | 01:24 PM

coinwasher

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From: Glen Allen (Richmond) Virginia

I agree guys, I have always heard them rattle in your hand but I never heard one rattle while it is running. I will try a new one and see if it quieter.
Thanks for the feedback!

May 25, 2007 | 09:11 PM

Sayfoo

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Joined: Sep 2005

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From: Orange County Ca

Check your vac hose. Mine would colasp when hot and I had the same noise.

May 25, 2007 | 11:28 PM

VETTEVIC

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From: West Central Florida

Your PCV valve is rated by the vacuum required to open the valve, just like the power valve on a holley carb. If you look at the bottom of the valve the plunger or part that moves inside will have a marking on it that can be traced to the vacuum needed. I do not know where to get this info at the moment, but you could try a valve made for an earlier low vacuum car like the early 350/327 HP engines. My guess is you got one to fit your year/model with the stock engine and your new engine package doesnt pull enough vacuum to keep the plunger up at idle.