ok since this has not been done before or if it has it has been hidden in the millions of threads on this forum, I went ahead and decided to take some pics of how to remove, clean and install the radiator stack. this should pertain to all OBS trucks since I have an LBZ and it is generally the same for the LLY and LB7. Symptoms:
1. truck is running a little hot.
2. transmission is running a little hot.
3. A/C is not quite as cold as it was before. (should be done before this https://www.duramaxforum.com/forum/di...evap-coil.html
4. truck is operated in dirty/dusty generally nasty conditions.
5. you have changed out the thermostats and have done a complete DEX-cool flush but engine is still running kind of hot.
now this is not a cure all for some of these conditions, because maybe you need to change fluids, maybe something else is going on to cause the issues, etc. this is a how to for removal and reinstall of the coolant stack whether just cleaning them like I did or having to replace them for what ever reason. it is a good service to add to your yearly maintenance routine as well.
so lets start with what you will need to accomplish this project. before you begin:
1. you need to get you some engine cleaner/degreaser
2. get a good pressure washer. one that will easily remove the garbage that has collected on your coolant stack but not so powerful. you have to remember that you will be spraying it on the fins of the radiators and around electronic equipment.
3. make sure that you have you plenty of good hydration beverage, like me I had me some Gatorade and water because I was out in the TX. sun during the middle of the day.
4. below is a list of tools that you will need to accomplish this mission
5. if I have forgotten something them by all means make sure that you acquire it before you start this project.
6. MAKE SURE YOU HAVE AT LEAST 4 HOURS FOR THIS, 1.5 FOR REMOVAL AND 1.5 FOR REASSEMBLE, AND 1 HOUR AS A BUFFER/BOO BOO LIP COOL DOWN TIME list of tools needed
1. body clip removal tool
2. long needle nose pliars and a magnetic retrieving tool (to retrieve something if you drop it)
3. socket wrench with a couple extensions and a swivel joint. (I used 1/4" drive because none of the bolts were that big or tight that constituted anything above 3/8" drive.)
4. sockets in these sizes 10mm, 7/16", 1/2"
5. a T25 TORX head (bit/screw driver/wrench whatever you choose) there are only 4 bolts/screws that you will have to remove with this.
6. you can add a good flat tip screw driver and channel locks to the list.