newguyinnc
OBS Enthusiast
- Joined
- Jun 1, 2014
- Messages
- 51
- Reaction score
- 14
Hey all, have a 1998 k2500 with gen6 454. Bought the truck and immediately noticed it would get hot. 235° , but not boiling over. Changed radiator, water pump, thermostat, fan clutch, upper and lower radiator hoses, and flushed the system twice. Even pulled the lower block drain plugs and flushed it that way. Still got hot. Decided to have the motor completely rebuilt. Same issue. It now currently has a proffessionaly rebuilt original motor, new aluminum 4 core radiator, water pump, 195° thermostat, fan clutch hoses, thermostat housing , fuel injectors, and fuel pressure regulator. It'll drive around at around 215° , when you stop for a light or get off an exit off the highway, it will climb to 235°. Once you take back off, it will go back down to 215°. Cats were checked with a sniffer ant local exhaust shop and all sensors under the hood were changed when motor was reinstalled. Gauge was double checked against a mechanical gauge before motor was pulled to rebuild. Thinking there's a block in the motor preventing full flow in the cooling system, but entire engine was hot tanked when rebuilt. Scratching my head at this point. Any ideas on which direction to go from here??