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Engine heat scat tube

Cardiff Kook

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Sisters, OR
What anyone doing to keep scat tube from rubbing one engine mount? I take it thats bad as it will wear though scat then steel spring will start wearing my engine mount.

Tried permatex red rtv and made a huge mess. Previous person who swapped it out appeared to use same stuff and looked perfect.
 

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What anyone doing to keep scat tube from rubbing one engine mount? I take it thats bad as it will wear though scat then steel spring will start wearing my engine mount.

Tried permatex red rtv and made a huge mess. Previous person who swapped it out appeared to use same stuff and looked perfect.
This tube is too short. If it were longer it would rest lower in the mount triangle away from the tubing.
 
This tube is too short. If it were longer it would rest lower in the mount triangle away from the tubing.
Issue is it has to go above another bar prior to connecting to heat exchange.

For what its worth I tried different lengths. Ended up settling on what was called for in parts manual- 22 inches.
 
Chafe protection is an art form. One has to become imaginative at times to meet the objective of keeping two surfaces separated. Adel clamps are one accepted practice. To protect tube structures, it is also common to use rubber hose of ID near the size of desired protected tube OD, split the hose to open and place over desired area of tube to protect. I prefer lacing cord in lieu of "zip ties" to secure the hose to the tube as plastic ties become brittle over time due to heat in the engine compartment. Procedures of how to secure with cord are well covered in AC 43.13 Chapter 11, yes, that is electrical, however, the techniques for securing bundles are applicable to other areas. A dollop of red RTV will hold the split tube in place as well, depends how much one is aesthetically driven. First step is ensuring your hoses, lines and bundles are actually routed correctly and of proper length with proper strain relief.

TR
 
Look at your picture. Imagine if the scat was longer at the end where it attaches to the cabin heat valve. Where would the extra length go? The bottom of the loop would be lower in the engine mount triangle with less chance of rubbing on the tubing.


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Chafe protection is an art form. I prefer lacing cord in lieu of "zip ties" to secure the hose to the tube as plastic ties become brittle over time due to heat in the engine compartment. Procedures of how to secure with cord are well covered in AC 43.13 Chapter 11, yes, that is electrical, however, the techniques for securing bundles are applicable to other areas.

TR

👍
Tie wraps are for tractors!!
Koroseal lacing and rib stitching cord are the preferred methods.
Those plastic tie wraps will wear right thru an engine mount over time.
 
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