Posted a few weeks ago on replacing turbo core on my Defender 300. Fitting was OK and all was good. Noticed recently however a marked drop in grunt, typical of no turbo. Pull off air feed hose and ---- virtually no blades left and deposit of ally dust in inlet hose. Before you ask, yes, I did make sure the new blades weren't fouling anything and checked it all spun up OK.
This was the same issue as the one I replaced, with the exception it's seen it off in weeks rather than years. Looking at the obvious things first -- there is a good, clean oil flow to the turbo and there is minimal play on the shaft, as you would expect on a new unit. The feed hose is sound (and doesn't have anything obviously unpleasant hanging around in it) and connected to an original, well maintained filter housing. The truck does mostly open road miles and (tempting fate) is an absolute cracker otherwise in the engine department.
I really am at a loss to fathom this and obviously don't want to fit another new one before finding an answer. The only non-standard part of the truck is a removed EGR valve; aperture blanked with plate -- but I can't really see how that would impinge on the turbo.
So --- any thoughts most welcome, particularly if you've experienced this and found the answer !
Mike.
This was the same issue as the one I replaced, with the exception it's seen it off in weeks rather than years. Looking at the obvious things first -- there is a good, clean oil flow to the turbo and there is minimal play on the shaft, as you would expect on a new unit. The feed hose is sound (and doesn't have anything obviously unpleasant hanging around in it) and connected to an original, well maintained filter housing. The truck does mostly open road miles and (tempting fate) is an absolute cracker otherwise in the engine department.
I really am at a loss to fathom this and obviously don't want to fit another new one before finding an answer. The only non-standard part of the truck is a removed EGR valve; aperture blanked with plate -- but I can't really see how that would impinge on the turbo.
So --- any thoughts most welcome, particularly if you've experienced this and found the answer !
Mike.
