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  #16  
Old 11-11-2004, 01:42 PM
whunter's Avatar
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Angry This device is FRAUD...

Quote:
Originally Posted by tomm9298
I found this while doing a search on blow by. All you mechanical engineers, will this device work on a diesel? Please let me know.

http://www.misterfixit.com/envalve.htm

Thanx....
It has one function; separating you from your money.
Go back to engine theory 101; the PCV has one and only one function:
The PCV maintains neutral or negative pressure in the crankcase to prevent atmospheric emissions.
This fraud device claims to do exactly what the existing PCV does, for seven times the cost, they depend on owner ignorance and gullibility.
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  #17  
Old 11-11-2004, 09:38 PM
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Diesels actally do have manifold vacuum, but it is very low. This vacuum is present not only from the resistance the intake plumbing gives, but the air filter restricts the airflow somewhat as well. Conclusively, the dirtier your air filter is, the more intake vacuum will be there. Some diesel trucks have air filter indicaters that work on this vacuum principal. Since many diesels don't run valve seals, a dirty air filter can mean increased oil consumption as well.
Diesels also typically run positive crankcase pressure as well, due to inherent blow-by gas. This gas is vented into the intake manifold where it is burnt by normal combustion.
In other words, the intake manifold has a slight draw, and the crankcase has slight pressure, to vent crankcase gasses.

As was stated before, this guy is hoping to convince you that his product is something special, which it isn't. I bet he'll sell some anyway.
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