Engine System - Diagnosis and Tests/Measuring Engine Blow-by CHECKING ENGINE OIL PRESSURE 1. Before checking oil pressure, warm up engine to allow the lubricating oil to reach operating temperature. 2. Attach pressure gauge. RG6415 -UN-21AUG92 NOTE: Use gauge from FKM10002 or JT05470 Universal pressure test kit if available. Otherwise, use gauge with a reading range of 0—600 kPa (0—6 bar ; 0—87 psi) minimum. 3. At 93˚C (200˚F) operating temperature, gauge should show a minimum pressure of: —at 800 rpm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 kPa (1 bar; 14 psi) —at rated speed (1500 or 1800 rpm) . . . . . . . . . . . . . . . . .
275 kPa (2.75 bar; 40 psi) —at rated speed (more than 1800 rpm) . . . . . . . . . . . . . . . 350 kPa (3.5 bar; 50 psi) CD,3274,G210,8 -19-04JAN99 CTM3274 (01JUL99) 210-9 Saran Liter Engines 060799 PN=332 MEASURING ENGINE BLOW-BY Place a hose with a standard gas gauge over end of crankcase vent tube. Run engine at rated speed (engine at operating temperature and run-in, with at least 100 operating hours). Measure blow-by over a period of 5 minutes. Multiply figure obtained by 12 (hourly rate) and check against specified figure shown in Specifications. If blow-by is lower, there is no undue wear between piston rings and liners. For a further check, carry out compression test.
If blow-by is higher, there is excessive wear between piston rings and liners, resulting in loss of engine power. Overhaul the engine. CD,3274,G210,9 -19-15MAY92 210 9