Posted 17 September 2005 - 03:16 PM
When the Lt1 first came out, a big deal was made about the flow direction of the coolant, from the top, or heads on down, as an improvement in engine cooling system technology, and adding to the longevity of an engine.
Now, I recently read that the LS1 & LS2 were reverted back to the old system,
of coolant flow from the bottom of the engine up and out thru the heads.
My question is, is this correct, and if so, why? What was the technical reasons for reverting back?
The explanations for going to the heads first system made a lot of sense, and I have not heard anything about why this methodology was dropped, if in fact it was dropped.
If it wasn't, then why is this significant difference not publicized as superior to the life of the new small-block engines, when compared to the competition?