November 2018 - That's a long time without an update, going back way before lockdown.
I said a few posts up that it seemed that if I didn't get things finished at once, there would be a long delay before I had time again and then other faults would start to emerge. Well I did get the carbs sorted and working nicely. I had to replace a rotted out downpipe and had a lot of problems with the collector box joints. The exhaust is mostly sealing now, though those olive joint seals on the back two downpipes are never 100% right. I thought I had fixed a slow leak on the rear wheel by polishing the inside rim and using seam sealant, but it has started to go down again, albeit slowly. That has not been my main problem with the Venture for the past year or two though.
For twenty years I did not have the slightest concern about the cooling system and didn't really give it a moment's thought. When it stated failing I wasn't prepared and didn't know what I was looking for. I don't really know what went first or what caused what else to go. I was basically chuffed that I had her running again, but found I had to top up the expansion bottle a couple of times. I thought I had probably left an air gap after re-installing the radiator. Whatever the original issue was, the system boiled dry on the way back from the seaside one evening (the first proper run for it) enough to overheat the clutch mechanism. I didn't know the cause because some of the electrical warning systems were getting a bit iffy through sitting so long. I hoped they would re-establish electrical connections, but they didn't get the chance. With a thermostat sensor not working properly I just hadn't realised how hot it was getting. This seemed to be due to the failure of an o-ring on one of the pipes to the thermostat housing, but it wouldn't come off because of one of the screws holding it in was seized. That took forever because of access and that screw just being so stubborn. Having the cooling system run out of fluid is not a good thing though and so next this fubarred the water seal in the water pump, so that had to come off. I had to chop and change a bit with the spares I could get (Ventures are not common in the UK), but after a false start missing off quite an important circlip I replaced the old plastic pump with a metal one from a V-Max. In the process the plastic angle pipe broke, but a spare had come with the pump cover, so that was okay.
Now finally you'd hope all would be hunky dory, but there was still a litany of little leaks that slowly got closed up until... it was still overheating. I'm not sure if it has been leaking until it doesn't have enough water and then boils, if the drain valve was in the wrong position, if it was escaping through the cap or what. My latest effort has been to jiggle with the drain valve, change the radiator cap and flush the radiator. Right now it is full of Holts radflush and has been out for a good ride. The needle went off the scale, but other than that things seem okay. The radiator did not lose water and the surge tank did not get sucked in after it cooled down. The best interpretation is that the new temperature sensor is no good and everything else is fine. It was probably a second hand V-Max one that I got - or maybe it reacts with the rad flush - who knows ?
When I've flushed it, put decent coolant in and run it over this weekend I'll know if she's properly on the road again or due to go back into the garage.
Oh yeah - it's good to be back. Sorry it's been a wile since I posted.