Whats the usual way of doing this job?,I t looks nigh-on impossible to get the bottom hose off, there are no taps under the manifolds, only brass plugs & I cannot even see the bottom of the Rad. to see if there is a bung or tap.---Are there ANY easy jobs on Rangie's, there are definatly some advantages to having a Series Motor, even though they lack the comforts of a R/R :!: :!: