Came across this today

[Rawze]

(02-24-2022 )stevegrutz Wrote:  Hey rawze I pulled a x15 apart that had the egr cooler delete with the blocked off water pump, and I couldn’t believe what I was seeing. Not only was 5&6 completely cooked but basically every hole including #1 were very ugly. What a huge mistake it is to block that rear water connection off, it looks like it made it very very difficult for the coolant to circulate at all when you do that.

yes, it causes circulation problems.. and the blocked up port on the water pump causes face-loading of the pump bearing and about 70-75 psi of dead-headed pressure in the blocked section of pipe too. It is not good at all for the water pump or the engine to do such things to it.