09-13-2019, 10:34 PM
5-Year WF Supporting Member
Join Date: Nov 2016
Location: Phoenix, Az
Follow up...In case anyone else was as curious as I. Am very pleased with the amount of sludge that came out. After the first Drain the aluminum inside the radiator looked as it did when I put it in. The Prestone super flush would get to what I thought was clean, but there was a little yellow rust color to the aluminum left over.
Drained radiator, flushed and filled with water, ran a final rinse then drained and added the Thermocure, drove for a couple days for a few hours as per instructions. Then drained, filled, drove and repeated till I got to clear fluid. took a total of 7 cycles.
Left to Right in the pic are samples of what came out.
1st) Last drain before adding T-cure.
2nd) 1st drain after 2hrs run time at operating temp.
3rd) 2nd drain after another hour at temp.
4th) 7th and last drain. Still off color, but the water was remarkably clear of almost any particulates suspended in the water.
All in all I was pretty happy with the results, Looking forward to watching the Temp gauge on the freeway when I hit some stop n go traffic with new coolant, I sometimes get a little heat spike for a while after running 70 down the freeway for 20 mins, and then hit slow traffic with little airflow. Looking to see if this helps it a little.
'89 YJ 4.2 with MC-2150 Carb & HEI, 2-1/2" Magnaflow Exhaust. BA-10, NP231, Adams front Diveshaft, SYE kit, 31x 10.5 x15 BFG KO's, 2 1/2" RE Springs, 1" Body Lift. RS5000x shocks, Hella H-4's, No emissions.
FSM Manuals https://www.dropbox.com/sh/0vfmk6jc5...v7lceZk7a?dl=0