whats the purpose of these PCV valves? defect?

R

rbuljo

Seaman
Joined
May 30, 2012
Messages
58
I have a 4.3GXI-B, see sig for serial.

on top of the exhaust risers are a "PCV valve" #3857761, the starboard side does "gurgle" alot after engine is stopped, the port side however is not making a sound at all..

are one of these valves defect since they behave differently, whats the purpose of these valves?

item #6 in this drawing from marinepartseurope.com
18801.jpg

youtube video of the sound.
 
R

rbuljo

Seaman
Joined
May 30, 2012
Messages
58
Re: whats the purpose of these PCV valves? defect?

anyone got any ideas?
 
N

nimrod69

Seaman
Joined
Feb 11, 2008
Messages
55
Re: whats the purpose of these PCV valves? defect?

Those aren't PVC valves, they are exhaust check valves. They keep water from sucking into the engine if the engine were to diesel after shutdown.
 
R

rbuljo

Seaman
Joined
May 30, 2012
Messages
58
Re: whats the purpose of these PCV valves? defect?

Thanks for your reply. Are one of them bad since they behave different?
 
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