BogMonster Posted October 25, 2008 Share Posted October 25, 2008 I just had a new radiator fitted to my 110 yesterday (moral of THAT story - do not believe the story that synthetic rope doesn't spring back and I have a hole through my radiator from a winch hook to prove that it does!!!) and I took the opportunity to fit some metal bungs into the top of the rad and the thermostat housing, they have been sitting on top of my fridge for a few months "pending" and it seemed a good time to put them in since the coolant was out anyway. First impression is that as they both leak (pink stuff on the rad and the thermostat housing) the immediate benefit of replacing the old plastic ones seems a bit vague! They don't leak a lot (a pink stain and a few drips on the thermostat housing) but any coolant leak is too much for my liking. What do the genuine old style radiators use under the brass bungs - do they have a copper washer, fibre washer, or just metal to metal? These are as tight as I dare. I am a bit wary of fitting a copper washer between two bits of aluminium and then sitting them in a hot wet liquid - might cause electrolytic corrosion or would the antifreeze mix stop that? - anyway I don't think the old LR brass bungs have a washer under them but I don't have an old rad to check that - can anybody confirm please? A fibre washer might be the other possibility - if I can find one the right size, which is not guaranteed around these parts... in fact it is more likely that I won't find any! Otherwise I will have to go back to the old plastic ones to be safe. Ta Quote Link to comment Share on other sites More sharing options...
western Posted October 25, 2008 Share Posted October 25, 2008 older rad plug has a sealing washer NTC5171 between it & the rad, according to my 110 1987 on parts book. IIRC on my 200Tdi is was a rubber 'O' ring hth Quote Link to comment Share on other sites More sharing options...
Dutchgit Posted October 25, 2008 Share Posted October 25, 2008 older rad plug has a sealing washer NTC5171 between it & the rad, according to my 110 1987 on parts book.IIRC on my 200Tdi is was a rubber 'O' ring hth Use an o-ring or a rubber washer that fits. Quote Link to comment Share on other sites More sharing options...
OilIT Posted October 25, 2008 Share Posted October 25, 2008 older rad plug has a sealing washer NTC5171 between it & the rad, according to my 110 1987 on parts book.IIRC on my 200Tdi is was a rubber 'O' ring hth yep the metal ones have rubber rings (the o ring type not the ones you put on your kids arms ) Quote Link to comment Share on other sites More sharing options...
simonr Posted October 25, 2008 Share Posted October 25, 2008 Steve, What you need is a 3/8BSP fibre tap washer. On most rads, the mating surface is fairly soft and acts bin itself as a compression washer - but some just will not seal that way. The washer is a tight fit on the thread and needs to be screwed on. There should be a rebate below the thread in which the washer fits loosely. Si Quote Link to comment Share on other sites More sharing options...
callum Posted October 25, 2008 Share Posted October 25, 2008 is it not 1/2" on the rad? it is on a 2.5 n/a certainly. i jus use a dowty washer like this http://www.racingvincent.co.uk/14%20Norton...%20Sale/B66.jpg i would say you could get said washer and 1/2" bsp brass blanking plug at your local b&q, however i don't even think they have a b&q in argentina, so your local plumbing place then, whatever that may be... Quote Link to comment Share on other sites More sharing options...
nas90 Posted October 25, 2008 Share Posted October 25, 2008 is it not 1/2" on the rad? it is on a 2.5 n/a certainly. i jus use a dowty washer like this http://www.racingvincent.co.uk/14%20Norton...%20Sale/B66.jpg i would say you could get said washer and 1/2" bsp brass blanking plug at your local b&q, however i don't even think they have a b&q in argentina, so your local plumbing place then, whatever that may be... Dowty washers good, thats what I used for the X-rad plug from Si Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted October 25, 2008 Share Posted October 25, 2008 Both my Rangie ie ones have a groove in the base of the cap for the o-ring to sit in -I have replaced them with generic rings and no trouble since.... Quote Link to comment Share on other sites More sharing options...
BogMonster Posted October 26, 2008 Author Share Posted October 26, 2008 Found some fibre washers (couldn't find either the tight tap washers or the Dowty type, but found some that were a loose sliding fit on the thread) and it all seems to be leakproof now. Ta for the info Quote Link to comment Share on other sites More sharing options...
JimAttrill Posted October 26, 2008 Share Posted October 26, 2008 I use cheepo 'stop ends' from the plumbers place. And those I use with the white plumbers ptfe tape. We also get Britpart brass plugs which have a shoulder and need an o-ring. They both work better than the placky LR plug. Quote Link to comment Share on other sites More sharing options...
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