PCV Valve Hose ?
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Mountain Pass
Joined: Apr 2009
Posts: 164
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PCV Valve Hose ?
Guys, the hose from the PCV valve to the throttle body has a foam type insulation/cover over it, or at least I'm assuming that's not the actual hose. It's crumbling and disinegrating. What's the purpose of the insulation? Do I need to replace it. I thought I might replace the entire PCV line per Krewat's suggestion and see if the P0171 code is eliminated. Can I just replace the rubber elbows with emission/fuel line?
Thanks!
Thanks!
FTE Leadership Emeritus
Joined: Jul 2002
Posts: 42,561
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From: Long Island USA
It's probably to keep evaporated oil/solvents from condensing in the pipe and running back into the engine, or running as liquid into the throttle body.
If you're in a warm climate, I can't see it being a big problem. You could probably just wrap it with foil tape and be done with it.
Me, I don't think I ever said replace the entire line, but do check the rubber elbow where it meets the throttle body.
If you're in a warm climate, I can't see it being a big problem. You could probably just wrap it with foil tape and be done with it.
Me, I don't think I ever said replace the entire line, but do check the rubber elbow where it meets the throttle body.
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Mountain Pass
Joined: Apr 2009
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No, you didn't say replace the whole line. I was thinking that since there are two elbows and a fitting in addition to the actual rubber hose/line, that it might be more cost effective, and less likely to leak, if I replaced the entire length of line and fittings with one line and one fitting.
Elder User
Joined: May 2003
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Mine had that covering too. I think it is insulation from engine heat so as not to cook the hose and make it crispy over time. I replaced the hose with some stiff 3/8 hose. Some hoses seemed to soft for my liking when I was looking. As long as it is rated for PCV you should be OK.
Senior User
Joined: Apr 2009
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From: South Carolina
PCV Valve hose and connection
I just bought a replacement hose from Ford. It too had the foam covering that you mentioned. I assume it is an upgrade to minimize the impact of heat and rubbing on other hoses. The problem I have is that this hose has a number of elbow joints and a large connector the diameter of a quarter for connection to the throttle body. My X has only a straight hose connection and no foam covering. Do you think they merely clip the elbows and connector and direct connect the remaining hose for a 2000 Ex V10?
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Mountain Pass
Joined: Apr 2009
Posts: 164
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I just bought some emissions hose the same diameter as the original hose from Autozone. I slipped some hot water piping foam over the emissions hose to serve as insulation. The elbow fittings looked fine with no cracking so I reused them. They are a slip fit into the emissions hose and throttle body.
No change to the engine trouble codes, so I'll keep looking.
No change to the engine trouble codes, so I'll keep looking.
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