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What's in a Heat Shield?

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Nunyas

Nunyas

Yoda
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So, anyone want to explain why you want to have the heat shield installed, and why some people would remove them?

I've found that the heat shield on my '76 'B is missing and have ordered one and plan on installing it next weekend if not sooner. I have a theory that the heat from the unshielded exhuast manifold might be causing the fuel in my float bowl to boil off and as a result causing vapor lock and forcing my fuel filter to go 'empty'.
 
Exactomundo! The shield is meant to prevent vapor lock. Even with them the later cars are subject to engine fires if gas is able to get onto the exhaust/cat.
 
you and TR are both right. FYI, a cat.converter dosen't start working efficently until it gets to around 700 deg.f.
And on an MGB thats about a foot from the carb.
 
/ubbthreads/images/graemlins/iagree.gif Mine went by the wayside when my headers and Weber carb were installed and my cat converter went missing...
 
Well, my cat. has been replaced with a 'universal free flowing' unit and is located under the driver's floor pan. But the exhaust manifold itself gets damned hot. While attempting to tune my car over the past year I've noticed that the throttle linkage gets too hot to manipulate with bare hands, if the car is running for longer than 10 minutes. That is part of the reason that I think the carb might be over heating...
 
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