I just removed my front exhaust manifold to weld it up. I want to reinstall it without the flat heat shield between it and the head. Has anyone left it out without problems?? The car is an 86 gt 2.8 (stock) no cat converter. I dont want to have a gasket on both sides of the shield. I feel thats why my manifold bolts were probably loose when removing it and its likely to happen again.
I left mine off when I did my engine swap. Mine had been installed flat against the head, with the gasket next, and then the manifold. (If you look at the shield, you can probably tell how it was installed. Different surfaces will leave different "indentions" on the shield.)
Having said all that... If you're running "catless", I'd leave the shield off. It was installed to keep vital fluids off of the cat, in the event of a violent engine failure, and "ventilated" block.
[This message has been edited by Raydar (edited 09-28-2013).]
That shield is intended to keep any breakage or oil away from the CAT. I found that re-assembly brought vacuum leaks with it so I deleted it. Better seal, and, no, no broken parts or sprays of oil, and........ (no CAT)