Irie308
Well-Known Member
- May 28, 2013
- 2,599
- Boat Info
- 2004 420 DB, GHS Hydraulic Lift
Garmin 8600/Garmin 1222 plus
AB Mares 10 VSX with 30 hp Tohatsu
- Engines
- Cummins 450C 8.3 L Turbocharged
Just finished having the aftercoolers cleaned and tested. was debating taking off the heat EX vs roding them out. The starboard one looks hard to reach the hoses. Also what would be the best process to drain the antifreeze the hose at the filter?These engines should run 160-164 if they are clean. Mine run 162 when we have 90* water here in Texas. So you’re probably on the right track cleaning the exchangers but don’t forget the aftercoolers and gear coolers as well.
the exchangers are easily removed and I would take them off and acid clean and pressure test them instead of just rodding them out in place. They do get pin holes and leak.