How can a welded intake manifold cause a fire or the engine to explode? On my 3.0L I brought it in to a dealership to get checked out for a antifreeze leak and they said you intake mani is welded and that its gonna explode or cause a fire. Its amazing the thing even works. What they hell are they talking about? I think they are just affraid of a modded car. And another thing is they say the engine is too big to fit in the car. Even though a '04 ford escape motor is the same exact block as a 99 v6 cougar block, except its bored out to a 3.0L. And it uses the stock engine mounts. All I wanted them to do was pull some codes and find out where the hell my antifreeze is leaking from sinec it is a large leak in the back of the engine. Thanks