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  #1  
Old 03-14-2011, 04:44 PM
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David_Nelson David_Nelson is offline
 
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Default Making your own exhaust heat shields - howto?

Hi Everybody,

I need a couple of heat shields but at $11+/ea (ACS, Vans) + S&H, I figure I can make my own in a matter of minutes for much less $$$. Looking at the one that came in the FWF kit, it looks to be made of aluminium. Can anybody confirm that and what type of aluminium?

Anybody making their own? Which aluminium are you using (2024, etc) and how far down from the exhaust port are you putting them? I'm looking at 22".

I've plenty of .030 and .063 2024-T3 sheet and a quick check shows that it has a melting point of around 500 ?C (932 ?F); seems a little on the weak side for the given application.

Thanks,
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Old 03-14-2011, 05:06 PM
John R. Graham John R. Graham is offline
 
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I'm pretty sure that heat shields are typically made out of stainless, not aluminum.

- John
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Old 03-14-2011, 05:28 PM
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You can certainly make your own....stainless strip standoffs, 2024T3 umbrella.
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Old 03-14-2011, 06:18 PM
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David_Nelson David_Nelson is offline
 
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Default Thanks!

Stainless strip - Check!

Thank you, Dan.
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Old 03-14-2011, 08:08 PM
gereed75 gereed75 is offline
 
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I had bad luck with SS strip mounts (I probably used too light a gage). The strip mounts invaribly broke after only a few hours.

As an alternative, I have had excellent results by using two AN3-6 bolts. I ground the head down to a thin "cap". I then drilled a hole in the solid portion of the SS hose clamp and clamped the "shaved head" bolts to the exhaust pipe, somewhat like a welded stud. I then attached the 2024T3 shield by jam nutting it onto the clamped bolt "studs" using steel and steel (no nylon) locking nuts. Has been very secure for 200+ hours. Cheap, easy to make, robust and easy to adjust.

No evidence of heat transfer to nearby fire sleeved lines.
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Old 03-14-2011, 08:50 PM
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N941WR N941WR is offline
 
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While you can make your own, it is just easier to add them to a list and include them with your next order.

The time you spend making them will exceed the few dollars Van's and Aircraft Spruce charges for them.
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  #7  
Old 03-14-2011, 09:29 PM
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LifeofReiley LifeofReiley is offline
 
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Quote:
Originally Posted by David_Nelson View Post
Stainless strip - Check!

Thank you, Dan.
David,

I've got some stainless in the hangar if you need some.

Darrell
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Old 03-15-2011, 07:42 AM
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DanH DanH is online now
 
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You can make them entirely of stainless if you want.

If you're having trouble with durability, you probably made the wrong kind....use four standoffs.

Typical for an 1-1/2" pipe:



The very good reason to make your own? Exact size as required.
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Old 03-15-2011, 08:13 AM
John R. Graham John R. Graham is offline
 
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Just to make sure I understand, four standoff and thus two straps?

- John
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Old 03-15-2011, 08:17 AM
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LifeofReiley LifeofReiley is offline
 
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Quote:
Originally Posted by John R. Graham View Post
Just to make sure I understand, four standoff and thus two straps?

- John
That depends on the size of the shield you require, could be two standoffs and one strap (clamps) for a small heat shield.
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