So I have been having what I thought was an issue but turned out to be my own stupidity...
A few days ago I did a big mission around town, I checked the coolant level the next day, sweet as. Then I did a wee jaunt later that day to show it off to my uncle who was visiting, when I checked it a bit later it needed a cup of coolant.
Filled it, did a mission all the way into town the next day and checked it before a 10 minute drive the next morning, all good. When I am back from the 10 mins drive the overflow is full and spilling on the ground.
I had been topping it up so naturally the overflow would get fuller, but it was weird.
I thought it might have something to do with the overflow position and tube length so I did a cheeky mod to check this which allowed me to monitor the coolant and give a bit of gravity assist;
Because I could see what was happening I soon realised that it takes quite a lot of time for the engine to cool enough to suck it all back. I had been waiting half an hour or so to check the levels after the short trips, but it has taken something like 4-5 hrs to suck most of it back after a 20 min drive. So actually it was me introducing the air when I cracked the cap. What a dumb bugger.
For some reason I had only ever checked it the day after when I had done a long drive, obviously giving it enough time to suck it back. Clearly this skewed the results and created a problem where there wasn't one. Doh!
Anyway with the earlier rad change there is enough room to put the tank just in front of the engine, and at a more reasonable distance and height. I reckon I'll do that today.
A few days ago I did a big mission around town, I checked the coolant level the next day, sweet as. Then I did a wee jaunt later that day to show it off to my uncle who was visiting, when I checked it a bit later it needed a cup of coolant.
Filled it, did a mission all the way into town the next day and checked it before a 10 minute drive the next morning, all good. When I am back from the 10 mins drive the overflow is full and spilling on the ground.
I had been topping it up so naturally the overflow would get fuller, but it was weird.
I thought it might have something to do with the overflow position and tube length so I did a cheeky mod to check this which allowed me to monitor the coolant and give a bit of gravity assist;

Because I could see what was happening I soon realised that it takes quite a lot of time for the engine to cool enough to suck it all back. I had been waiting half an hour or so to check the levels after the short trips, but it has taken something like 4-5 hrs to suck most of it back after a 20 min drive. So actually it was me introducing the air when I cracked the cap. What a dumb bugger.
For some reason I had only ever checked it the day after when I had done a long drive, obviously giving it enough time to suck it back. Clearly this skewed the results and created a problem where there wasn't one. Doh!
Anyway with the earlier rad change there is enough room to put the tank just in front of the engine, and at a more reasonable distance and height. I reckon I'll do that today.