smallholding biker

yup 3 of them, I get no problem from humans it's the bleedin squirrels that keep coming back...lol

the hp diesel is only post injection pump or hp pump and common rail, the back leak is an inherent fault in many diesels and most are cured by non return valves, there are a number of reasons for leak back depending on the pipework, joints, and lift pumps, mostly tiny tiny pin holes in pipes, seals and pump diaphrams