Jason merrick
Well-Known Member
The noise does get worse when warm; I ordered a pump for starters
Jason ,those H series have two different drain plugs.Yours is the later style which is accessed without removing that giant belly plate.Whilst it's off,check the head as they often get worn causing some fitters not to get it tight.A new plug is cheap insurance if it's ragged.
The older style was right at the underside of the engine and was a big plug with 3/4 inch drive to move it.