So I have emptied and refilled the coolant in my port engine for the second time. The reason was because I was getting overflow out the cap (along with some odd coolant boogers). I had been getting some coolant collecting under the engine, and thought it was from the overflow tube (I haven't upgraded the cap/overflow). But after going through the Lehman 120 manual's directions on filling with coolant again, there is no coolant coming out of the tube.
I did everything up to running the engine with the cap off at 900rpm. I checked on the coolant every couple of minutes, when I saw the coolant was expanding and overflowing the neck. I shut down and of course the level dropped slowly over the next few minutes to about a half inch from the top.
So I ran the engine again, this time with the cap back on. After a couple minutes, coolant again started coming out of the cap - and still nothing coming out the overflow tube.
I've read that it's a good idea to clean out the overflow tube occasionally. Has anyone done that? I'm assuming it requires removing from the top front of the expansion tank, as opposed to sending a wire or something up through the end of tube to clean it out...
I did everything up to running the engine with the cap off at 900rpm. I checked on the coolant every couple of minutes, when I saw the coolant was expanding and overflowing the neck. I shut down and of course the level dropped slowly over the next few minutes to about a half inch from the top.
So I ran the engine again, this time with the cap back on. After a couple minutes, coolant again started coming out of the cap - and still nothing coming out the overflow tube.
I've read that it's a good idea to clean out the overflow tube occasionally. Has anyone done that? I'm assuming it requires removing from the top front of the expansion tank, as opposed to sending a wire or something up through the end of tube to clean it out...