850 T-5R L5-2.3L Turbo VIN 58 B5234T5 (1995)
Standard: 65.000 mm +0.003 or -0.016
Undersize: 49.750 mm
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Bearing Seat Width: 26.000 mm +0 or -0.04
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Max. Out-of-round: 0.004 mm
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Max. Taper: 0.004 mm
3. Check straightness of crankshaft:
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Use dial gauge tool No. 999 9684 and magnetic stand tool No. 999 9696, or equivalent.
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Put crankshaft with the outermost main bearing journals in the V-blocks.
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Turn crankshaft and measure radial throw of other main bearing journals.
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Max. Radial Throw (All): 0.032 mm
4. Remove piston rings:
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Use piston ring pliers tool No. 998 5424, or equivalent.
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Remove carbon deposits.
Clean piston ring grooves by scraping with a broken off ground section of piston ring.
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Check for:
Damage.
Wear.
Cracking.
5. Check piston ring axial clearance:
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Use new rings.
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Upper compression ring: 0.05-0.085 mm
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Lower compression ring: 0.03-0.065 mm
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Oil scraper ring: 0.02-0.055 mm
Dimensions, version 1
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Upper compression ring: 1.5 mm
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Lower compression ring: 1.75 mm
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Oil ring: 3.0 mm
Dimensions, version 2
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Upper compression ring: 1.2 mm