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Date:  2-24-2013
Number of Hours:  1.50
Manual Reference:  
Brief Description:  Attach heat muff + fit exhaust pipes

Heat Muff:
- Bought a package of 2 screen door springs at Home Depot.
- Wrapped them around the exhaust pipe and hooked their ends to the adjacent coils.
- The coils wanted to unwind, so I wired the far ends together with stainless wire.
- Put the heat muff box around the springs and exhaust, and riveted the box closed.
- I still need to put on the stainless hose clamps to hold it on, but I won't do that until I locate the exact position of the muff, which will be after I locate the EGT probes.

Exhaust Pipes:
- The ends of the primary exahust pipes are too long for the second pipes, so I measured where to cut so the secondary pipes would not touch the engine mount before turning downward.
- Cut the ends of the primary exhaust pipes with a hacksaw. Went through like butter, no problem.
- Had to use a pipe expander to slightly enlarge the expanded ends of the secondary pipes. Sonex said it was normal for them to be slightly undersized, but it cost me $20 to buy a cheap pipe expander. It broke the second time I used it, but it worked well enough to get the job done before it did.
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Screen door spring, expanded and wrapped around the exhaust pipe.

Screen door spring, expanded and wrapped around the exhaust pipe.

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Heat muff installed over the springs and the exhaust, and riveted.

Heat muff installed over the springs and the exhaust, and riveted.

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After cutting and expanding the left exhaust in place.

After cutting and expanding the left exhaust in place.

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