help with Volvo 'radiator cap' coming away whilst we are on holiday!! MD2030 C

[TactilePaul]

The Thermex bolt on neck has already been shown in the photo!

OK I see. thanks, but that spigot is not connected to the system, it is the same as the spigot we have, its downstream of the spring / washer and is therefore only for overpressure / blow off, no point in conecting that on a boat, its gonna end in the bilges wither way, so its effictively of no use in marine situation, unless your funny about coolant on your engine occasionally. a taller one with side tapping(s) into coolant would be great soloution. all the vibration from hoses is on the cap as it stands, not good.

 

[Boater Sam]

OK I see. thanks, but that spigot is not connected to the system, it is the same as the spigot we have, its downstream of the spring / washer and is therefore only for overpressure / blow off, no point in conecting that on a boat, its gonna end in the bilges wither way, so its effictively of no use in marine situation, unless your funny about coolant on your engine occasionally. a taller one with side tapping(s) into coolant would be great soloution. all the vibration from hoses is on the cap as it stands, not good.

NO, you put a plain cap on it, not a pressure cap. I fail to understand why you have 2 connections to an expansion bottle, you only need one at the bottom, it will still vent air.

 

[ChromeDome]

Just FYI, this is a common setup - #14 not used when the expansion tank is connected via its #6. The spigot might be an obsolete leftover from before the expansion tank was added - not needed anymore as air will go to the tank via hose #20

 

[PCUK]

There is no small outlet tube on the above diagram, perhaps that is why that complex system is used. As the OP has a small tube on his system surely that could be used and would solve all the problems, once the flange is resoldered of course!

 

[ChromeDome]

It was referred to as a spigot in previous posts, so I kept that

 

[Mister E]

Has the problem been sorted yet?