(05-23-2015, 12:11 PM)testingapril Wrote: I've yet to be able to determine if it is a cooling system inadequacy or engine producing too much heat, but I've replaced the thermostat, water pump, rad cap, and rad. I'm pretty sure that the heater core loop is free flowing, I get heat in the cab.
I've checked with IR gun and it is truly overheating, or at least, borderline. I've also gotten boilovers, but am not currently.
I think my main problem right now is there is air in the cooling system and I can't figure out how to bleed it. Can someone provide instructions? I've tried cranking it with the rad cap off and running at 2500 rpm, but eventually it just sprays coolant out of the funnel violently.
Barring running rich/lean, or you have a bad head gasket, I'd think the engine is just being an engine, so suspect the cooling system?
Mr Fixkick can help more, but I'd verify your cooling fan's clutch is working ok, and maybe change out the coolant temperature sensor too, if that's a potential contributor to anything. (just messes up my idle when cold here though).
It's rare, but new thermostats can be bad on occasion. It is installed in the right direction? There's a hose feel check you can do to know.
If it is air that is in there still, ideal to elevate the front of the vehicle on a little hill or other incline, so it can direct itself up and away. That's how I vented mine after installing a new core. I still seem to hear a few bubbles now and then back in the core, but things seem to be working alright. I did have some close calls when my bypass blew one time (I had bypassed the leaking core) and then once I had the new installed, the old line blew. My head gasket is on borrowed time I worry at times.
This all assumes your head gasket is still ideal and the water pump is pumping.
This video has some generic info:
https://www.youtube.com/watch?feature=pl...vpaTW2WJ5Y