Hey everyone, I have owned a 98 suburban with a 6.5 diesel and 246,000 miles since May. I have done quite a few upgrades and fixes including replacing the hydro boost, new braided oil lines, relocated pmd, new glow plugs. I also upgraded to the larger fan clutch and fan. I also rebuilt the whole front end. I was looking under the truck today, and noticed that there was some coolant seeping. I looked up under the driver’s side, and can clearly see where the coolant is leaking externally between the head and the block on the back corner. I know I am in for a head gasket job, but wanted to come here for some collective advice. Is this engine worth doing a head gasket on, or too many miles on it? Are there any common issues I need to know about such as heads prone to cracking or block issues with this year? The truck has not over heated in my time owning it, and the only time the temp climbs a little is when towing a car trailer up long grades (never exceeds 210). Is there a good how to guide out there for doing the head gaskets on this engine?