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What is rebuildable
Hi Dieselers
The motor that ive just had rebuilt had piston clearances of 0.003", 0.0025" 0.0025" and 0.004" after 230,000kms. The wear limit in the manual is 0.0025" (the ovality and taper was acceptable). The motor was re ringed and had new big end bearings and the head rebuilt and runs great!
My experience so far is that the factory wear limit is conservative Bore taper, ovality and piston condition are probably more important than maintaining factory recommended bore clearance.
So if your diesel is low on compression and buring oil, whip off the head and sump, remove the pistons and hone the bores, replace the rings, lap the valves and fit valve stem seals and reassemble! (note the head gasket notches, valve clearance and cam/injector timing of course)
Hi Dieselers
The motor that ive just had rebuilt had piston clearances of 0.003", 0.0025" 0.0025" and 0.004" after 230,000kms. The wear limit in the manual is 0.0025" (the ovality and taper was acceptable). The motor was re ringed and had new big end bearings and the head rebuilt and runs great!
My experience so far is that the factory wear limit is conservative Bore taper, ovality and piston condition are probably more important than maintaining factory recommended bore clearance.
So if your diesel is low on compression and buring oil, whip off the head and sump, remove the pistons and hone the bores, replace the rings, lap the valves and fit valve stem seals and reassemble! (note the head gasket notches, valve clearance and cam/injector timing of course)
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