29-12-2013, 11:11 AM
I'd avoid a HDi if he's looking for reliability. 
There are a few good ones, just not many lol.
It'll be DMF and DPF on that particular HDi I think. So expect both of those to fail around 70-100k miles. The DPF should be ok if it's been used on motorway a lot, but when they don't get a chance to regenerate (eg - half hour at 70mph) they block up with soot and need a forced regen (brick on the accelerator ragging the feck out of it for a while) and 'sometimes' can't be cleared at all, requiring a whole new part. This one will also use Eolys fluid to lower the regen temp, but still if its been a town car that does 10 minute trips it's not gonna work, plus the fluid needs refilling at around 70k miles and isn't exactly cheap.
As for DMF's...just like any other flexible part they wear and eventually break, you do usually get a fair bit of warning though, loud rattling and lumpy acceleration/pulsing through the pedal.
There are a few good ones, just not many lol.It'll be DMF and DPF on that particular HDi I think. So expect both of those to fail around 70-100k miles. The DPF should be ok if it's been used on motorway a lot, but when they don't get a chance to regenerate (eg - half hour at 70mph) they block up with soot and need a forced regen (brick on the accelerator ragging the feck out of it for a while) and 'sometimes' can't be cleared at all, requiring a whole new part. This one will also use Eolys fluid to lower the regen temp, but still if its been a town car that does 10 minute trips it's not gonna work, plus the fluid needs refilling at around 70k miles and isn't exactly cheap.
As for DMF's...just like any other flexible part they wear and eventually break, you do usually get a fair bit of warning though, loud rattling and lumpy acceleration/pulsing through the pedal.