Thanks for the plug. Yes, I have swapped out the old manifold in favor of the newer style intake manifold to allow for Access of the glow plugs. This is not to say that you cannot change the glow plugs on an om612 engine. but if any of them are stuck or broken, they are impossible to remove with the om612 manifold in place. That manifold is a nightmare to remove and replace. If you are going to remove the manifold to replace glow plugs, I would highly highly highly recommend the swap. It is actually easier to make the necessary modifications and changes for the swap then it is to reinstall the old manifold properly. Once again, removing and replacing the om612 manifold is a nightmare. I know, I've had to do it way too many times.