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  #1  
Old 04-23-2012, 08:35 PM
buz buz is offline
 
Join Date: Jan 2006
Location: Ft. Pierce, Florida (FD88)
Posts: 160
Default Control cables outer cover melted

I was changing the oil today and noticed the cluster of control cables for the throttle, mixture, prop had there green plastic outer cover melted off in places just a few inches foreward of the firewall. After a closer look for the source of heat, it appears that the outlet from the heat muffs were the culprit. I am in Florida and rarely use heat, so the heat is continuously bypassing at the firewall diverter valve and blowing on the cables.

Could I just block off the inlet air to the muffs in the summer or would the muffs get too hot without flow through them. I'm thinking it will be fine but thought I would ask for opinions first.
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  #2  
Old 04-23-2012, 10:05 PM
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Bill.Peyton Bill.Peyton is offline
 
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Location: St. Louis, MO
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Default

I spoke with Vettermen about this and he told me to either let air flow thru the muffs, or remove the muffs and install a heat shield
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  #3  
Old 04-23-2012, 11:22 PM
Strasnuts Strasnuts is offline
 
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Location: Salt Lake City, Utah
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Default

One of my cables (I believe prop gov.) had bubbles in the green sheathing near the exhaust. I wrapped in it silicone tape and it seems fine after 200 hours.
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  #4  
Old 04-24-2012, 04:27 AM
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RV10inOz RV10inOz is offline
 
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Location: Brisbane Qld. Aust.
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Ours are all like that too.

600+ hours.......... no problem
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  #5  
Old 04-24-2012, 04:43 AM
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rleffler rleffler is offline
 
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Location: Delaware, OH (KDLZ)
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Default

While it doesn't help you, for those still building, Cablecraft does sell a version with a black sleeve that is rated about 80 degrees higher than the green sleeve.
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  #6  
Old 04-24-2012, 05:03 AM
Bob Axsom Bob Axsom is offline
 
Join Date: Mar 2005
Posts: 5,685
Default I dump the heated air overboard when not needed

It seemed logical to me that it was not a good idea to dump heated air into the area between the engine and the firewall so I routed a hose/tube to the cooling air outlet when I configured the heater/defroster system.

Bob Axsom
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  #7  
Old 04-24-2012, 05:34 AM
buz buz is offline
 
Join Date: Jan 2006
Location: Ft. Pierce, Florida (FD88)
Posts: 160
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Oz,
You say yours are like that. Like what?

Melted cables or blocked off muffs?
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  #8  
Old 04-24-2012, 06:52 AM
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Phil Phil is offline
 
Join Date: Nov 2006
Location: Waco, Texas
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Quote:
Originally Posted by rleffler View Post
While it doesn't help you, for those still building, Cablecraft does sell a version with a black sleeve that is rated about 80 degrees higher than the green sleeve.

What is the rating on the Van's green sleeve cables?

Phil
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  #9  
Old 04-24-2012, 06:54 AM
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RV10inOz RV10inOz is offline
 
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Location: Brisbane Qld. Aust.
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melted green stuff.......

And under the sump.....Nowhere near the exhaust either!
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  #10  
Old 04-24-2012, 07:26 AM
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Walt Walt is offline
 
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Location: Dallas/Ft Worth, TX
Posts: 6,340
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I always install firesleeve on exposed areas of cable FWF to help prevent heat damage.
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