8.1 Vortec
Has anyone had problems with exhaust manifold leaking or cracking.
Forum Discussion
More likely if:
1. Engine compartment air flow is restricted, like in a Van or Class C RV
2. Engine is Big Block like Chevy 454, 8.1, and Ford 460, bigger parts amplify the expansion differences between the heavy head and the light manifold. Ford V10 too, it's a small block but the extra cylinder on each side makes it another "long" engine.
3. It's working hard, Motorhome or Towing. I wouldn't expect daily drivers or lightly loaded RV applications to have the problems a large Class C might.
1. Engine compartment air flow is restricted, like in a Van or Class C RV
2. Engine is Big Block like Chevy 454, 8.1, and Ford 460, bigger parts amplify the expansion differences between the heavy head and the light manifold. Ford V10 too, it's a small block but the extra cylinder on each side makes it another "long" engine.
3. It's working hard, Motorhome or Towing. I wouldn't expect daily drivers or lightly loaded RV applications to have the problems a large Class C might.
