Running Hot

[boatwrench]

1990 2500 Suburban, 7.4L/THM400/4.10s

The thermostst stuck and the burb got hot, didn't boil over shut down in time. Replaced the thermostat w/a 195*, the water pump and all hoses.

I took my daughter to college this past weekend and the Burb was running warm to hot (210* straight up) Climbing The Grapevine on I-5 even with A/C off the temp climbed to 240* and the fan clutch didn't engage. I replaced the fan clutch Tuesday and still runs at 210*. Pressure tested cap and it relieved at 13p and bled down. The new Stant 16psi also relieves at 13psi but remains steady at that temp.

Today I checked the timing, it was 26* advanced so I retarded to specification 4*btdc. Runs like crap so advanced back to 16*btdc. This distributor was replaced while I was on a trip.

Tomorrow I will break down and replace the radiator. It's a four row. Any other thoughts?