What is this????
Thread Starter
Senior Member

Joined: Nov 2010
Posts: 511
Likes: 3
From: Chadbourn, NC
Year: 88, 89, 93 & 99
Model: Cherokee
Engine: 4.0
Today I was swapping out the coolant reservoir and noticed the HCV was missing so I decide just to swap out the complete hose assembly from my waggy into the '89. Well it was all fine until I pulled the hoses from the thermostat housing and found this!


I can only guess that this is some kinda additive?? It's the consistency of wet non dissolved washing powder and has no real odor. The truck has been sitting for about 6 years... Could it be that much corrosion got blocked by the thermostat after sitting soo long and me running it some the past few days??? Ideas??


I can only guess that this is some kinda additive?? It's the consistency of wet non dissolved washing powder and has no real odor. The truck has been sitting for about 6 years... Could it be that much corrosion got blocked by the thermostat after sitting soo long and me running it some the past few days??? Ideas??
Last edited by HighRoller; Feb 22, 2011 at 02:34 PM.


