Radiator Drain Plug

Sep 17, 2016
13
9
Kent
Funster No
45,170
MH
Hymer 564
Exp
3 years
Happy New Year to everyone! As I am not using the MH at the moment, I decided to flush and change the antifreeze. I purchased an online manual that shows everything but what you need to know, plus it's all in Italian! I set about dropping the sump shield with a view to access the bottom hose to let the existing coolant out. This took about two hours and ended up grinding the head off of the last securing bolt! I then looked for a drain plug to save disturbing the hose, and eventually found a temperature sender on the lower left of the radiator under the bottom hose. I disconnected the cable only to find that I couldn't get a socket onto the plug nut which-it seems- is part of the sender unit. Does anyone know which size of socket/ box spanner is used to remove this unit? I guesstimate from my tools that it is not a 32/29 mm ring spanner or a 29mm box spanner, so I think it may be a 30mm? The other problem is that the crossmember now has only one usable bolt hole to tighten the bull-bar and the sump shield to it! I seem to remember fiddling a bolt through and tightening it up to crossmember, but this meant a gap between that and the sump shield. I had the same result when I tried welding a bolt in place.(Difficult, laying on your back underneath the engine!) My latest idea would be to carefully drill through the existing holes, push a length of threaded rod through, and then put a nut and washer on top, so that I can hold it with a spanner while I tighten up the lower nut. Just got to be careful that I don't drill through the bottom of the rad! Any ideas?
 
Apr 19, 2008
1,596
2,022
Kent coast
Funster No
2,211
MH
Rapido Merc
Exp
brought first van 16 yrs ago
Its not too bad a job to take the radiator out, access allows giving a good clean around engine bay and also flush radiator through with hose.
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