What makes your intake manifold melt?
 

I have bought 3 intake manifolds. And have had them put on by a local mechanic. I bought an audi a4 2007 quattro T2.0 and the computer said it had 12 misfires. additionally it said that the thermostat was bad and that the inter-coolers were bad. I ordered the parts and they were installed. its still getting hot and I'm afraid to drive it again or its going to melt through the manifold again. Any idea's guys? :confused::(