Damn, thats why I’m going to post a link to the webinar.
There was plenty of information that was as relevant as what I outlined, but it wasn’t nearly as specific to what we discuss here.
And I kinda forgot about this because it doesn’t usually apply to Chrysler stuff (I happen to have a pump that breaks this sort of rule).
Tim Foster was discussing oil loss at different points in the system, and one was at the pump cover. He basically said that a cast iron cover was the best way to close off the pump, rather than a cheap stamped steel cover or an aluminum one.
The cast iron is more rigid and has built in lubricity, where the others do not. Of course, I have an aluminum cover on my pump because that’s how it’s designed, but it’s not a thin piece either.
I need to listen to it again because there’s a lot of information in it.
I suppose the cover isn’t subject to anywhere near the stress as the body of the pump where it meets the cap.
Just my WAG on that, but he also talked about coatings and things on the stamped covers.