I’m troubleshooting a coolant issue and am hoping you all can help.
I’ve noticed that coolant doesn’t seem to move from the radiator to the overflow tank and vice versa. I pulled the hose that goes from the radiator neck to the overflow and sucked/blew into it and it seems like the hose is blocked/pinched/clogged. I cannot blow into the tank through the hose at all.
Before I tear into this and start moving stuff out of the way…….this hose between the radiator and overflow should be free flowing…..right?
A while back I read a discussion here that strongly suggested replacing the radiator cap, if I recall it had something to do with the cap spring not functioning properly which could/would cause coolant system issues since it didn’t maintain the proper pressure.
They are inexpensive, but since you’re into the coolant system you might do that at the same time if you haven’t already.
For a while now I’ve been noticing that the coolant level in the expansion tank never changed. I started worrying about everything working properly so it pulled it all apart. Turns out the drain neck on the expansion tank was completely clogged and wouldn’t let coolant flow out of the tank. Cleaned that all up, replaced the hose and radiator cap and all seems to be back to normal.