This is what the impeller did to the inside of my motor, I put it back together and it seems to run fine, but is this something I should worry about?

 

I'm pretty sure that didn't come from the water pump, i believe its caused by the machine process the block goes through.

 

That's some good lookin' coolant......hope others take notice.

 

That is what I have been told but the water pumps impeller looks like it was rubbing on something, I dunno this is prob a cause of mee being too paranoid but I would rather be safe then sorry...

 

Thanks! I take pride in keeping my jeep on point, The other day I drove 20 miles to the wrecking yard just to pick up some of those little covers for the screws on the a pillar. I do all the maintance in the manual and more.

 

Don't u just luv those threads that say "my coolant is rusty/lumpy........".

 

If it doesn't look like the impeller could move at all and it still feels firm then I'd say you're okay. You could take a wad of puddy and make a ball, stick it to the inside wall there and push the water pump in and see how much of an impression it makes in the puddy. It'll give you a good idea how close it is.

I just looked at the two picures of this area in my "distributor/timing" thread and I see the same machine marks on the inside of the block.

 

I cant cont the number of times ive seen this before and not just on xj's. It is caused by your water pump, not extremely serious but not ideal. Many times its caused by not using a gasket and getting by with rtv

 

I have never done anything on this jeep half a$$ed, there was def a gasket, I know because I spent 30 min with a wire brush getting the old one off....

 

If you owned it since it was new, then rule out missing gasket, If not....

 

I'm positive that's what it is. I've had enough of these 4.0s apart to verify that. They're all that way.

 

Cool thanks, I would hate to think there is something wrong with it.

 

if the water pump did that the impeller on pump would have matching marks.

 

high flow pump on xj

 

Did the pump impeller look something like this? LOL As long as pumps don't leak, just presume they're fine. Seen that posted a few times. Bet that motor ran hot AND the heater didn't work.