Exhaust heat shields with airlift bags, needed? - Chevy Impala SS Forum
 
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post #1 of 7 (permalink) Old 02-16-2004, 06:04 PM
tlentz
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Just like the subject says... do you really need the heat shields? I've got the flowmaster force-III system if it matters.

Thanks!
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post #2 of 7 (permalink) Old 02-16-2004, 07:49 PM
bengston
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Mine are still hanging on, but, from what I've heard, they tend to vibrate themselves off after a while anyway, and people have run without them without issues.
post #3 of 7 (permalink) Old 02-17-2004, 03:30 PM
earplug
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I melted the airlines while towing a trailer. Was stuck in construction traffic during a 100+ degree day. I only had one heat sheld on each side. I have an extra bag now
If you tow or haul stuff, I'd install all/four of the shields.
 
post #4 of 7 (permalink) Old 02-17-2004, 03:38 PM
MafioSSo
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Quote:
Originally posted by earplug:
I melted the airlines while towing a trailer. Was stuck in construction traffic during a 100+ degree day. I only had one heat sheld on each side. I have an extra bag now
If you tow or haul stuff, I'd install all/four of the shields.
Wouldn't it be better to install headerwrap instead of all of those heatshields?
post #5 of 7 (permalink) Old 02-17-2004, 06:54 PM
tlentz
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Mine only came with two shields (4 hose clamps though). One of my sides looks like it may hit the spring if I put the shield on it. And for both sides getting the shield on, which looks like it's designed for a straight pipe, will take a bit of creative engineering.

I had thought of header wrap, but it's $25 for the smallest roll you can buy. I wonder if there's something else that would do the job? It doesn't need to hold up to quite the temps that header wrap does since it's farther back in the exhaust.

The hose comes out the bottom and is plenty out of the way, I don't see melting that happening.
post #6 of 7 (permalink) Old 02-18-2004, 03:48 PM
gleiters
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I picked up a 15 ft. roll of header wrap for $18. Put it on 9 months ago to protect the Airlift bags - no problems. Seemed like a better solution than the heat shields.
post #7 of 7 (permalink) Old 02-18-2004, 04:54 PM
threeimpalas
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The header wrap will trap moisture speeding up the rusting process on any non-stainless steel exhaust pipes you might have. Our '94 has 2.5" pipes and air-lift bags w/o any heat shielding. No problems in the years it's been on.

You'll only melt the lines if you route them in a way they could come in contact with the pipes. Taking the time to do some concientious routing will prevent that from happening. It's also pretty tough to melt the bags unless you've got your exhaust right up on the spring, in which case you'd have even bigger problems.
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