nic55kel
Nic55kel
Bought this very nice 1986 F-250, C6, GV, 6.9 from a younger guy who had it as a project but had to give up as needed $.
Running very hot when I acquired it. Radiator was all scaled up and plugged. He never really figured this out I guess, anyway put in aluminum rad and truck ran sweet.
No observable blow by, starts real easy anywhere from cold to super hot. Return lines all replaced, 7.3 glow plug system, new batteries, good tires, brakes just done.
PO told me he had just replaced the thermostat, have read all horror stories about non OE thermostats and had it on list to get to.
Anyway have put a few hundred miles on it and all good until yesterday driving along and the temp gage pegs. Luckily I notice it just before it boils over. Pull over and the coolant starts to back up into the overflow and fills and leaks out just a little coolant. Cools down and sucks it all back into the engine. I figure that is just about as close to cooking it as I would ever want to get.
The fact that it pushed the coolant out the bottom told me the thermostat had failed closed. Tow it home and pull the thermostat - it had mechanically separated and I guess the pump pressure held it in the closed position.
Well will be getting ford stat for sure now.
Just want to thank all the great contributors to this site, it is a goldmine of information and although the 6.9 lacks power I must admit I am really starting to love its sound and simplicity and hopefully soon its reliability.
Running very hot when I acquired it. Radiator was all scaled up and plugged. He never really figured this out I guess, anyway put in aluminum rad and truck ran sweet.
No observable blow by, starts real easy anywhere from cold to super hot. Return lines all replaced, 7.3 glow plug system, new batteries, good tires, brakes just done.
PO told me he had just replaced the thermostat, have read all horror stories about non OE thermostats and had it on list to get to.
Anyway have put a few hundred miles on it and all good until yesterday driving along and the temp gage pegs. Luckily I notice it just before it boils over. Pull over and the coolant starts to back up into the overflow and fills and leaks out just a little coolant. Cools down and sucks it all back into the engine. I figure that is just about as close to cooking it as I would ever want to get.
The fact that it pushed the coolant out the bottom told me the thermostat had failed closed. Tow it home and pull the thermostat - it had mechanically separated and I guess the pump pressure held it in the closed position.
Well will be getting ford stat for sure now.
Just want to thank all the great contributors to this site, it is a goldmine of information and although the 6.9 lacks power I must admit I am really starting to love its sound and simplicity and hopefully soon its reliability.