48530-87D10 Suzuki MAIN CHECK VALVE

start by:a) remove oil pan1. Check each main bearing cap for its location on the engine. Each cap has a number which gives the location of that cap. Make a note that the number on each cap is toward the front of the cylinder block. 2. Remove the bolts and washers that hold main bearing cap (2) in place. Remove the bearing cap and the lower half of the main bearing.3. Remove bearing (1) from the bearing cap. When the No. 1 main bearing cap is removed or installed use tool (C) to remove and install the bolts that hold it. 4. Turn the crankshaft until tool (A) can be installed in the oil hole in the crankshaft journal. Install tool (A). Turn the crankshaft in the direction which will push the upper main bearing out, tab end first.
If the crankshaft is turned in the wrong direction, the tab of the bearing will be pushed between the crankshaft and the cylinder block. This will cause damage to the crankshaft and block.
5. Put clean engine oil on the lower bearings. Install lower bearings in the bearing caps.6. Put clean engine oil on the upper bearings (the bearing with the oil hole). Install upper bearings in the cylinder block with tool (A). Be sure the tab on the back of the bearings fits in the groove of the caps and cylinder block.
When bearing caps are installed, make sure the number on the side of the cap is next to and respective with the number on the engine block.
When the bearing clearance is checked the crankshaft will have to be lifted up against the upper halves of the main bearings and held to get a measurement with wire (B). The wire will not hold the weight of the crankshaft. 7. Check the bearing clearance with tool (B) as follows: Put cap (3) in position and install the bolts. Tighten bolt (5) to a torque of 30 3 lb.ft. (40 4 N m). Tighten bolt (4) to a torque of 30 3 lb.ft. (40 4 N m). Put a mark on both bolt heads and the bearing cap. Tighten bolt (4) 120° 5° more. Tighten bolt (5) 120° 5° more.8. Remove the bearing cap and measure the thickness of the wire. The main bearing clearance must be .002 to .005 in. (0.05 to 0.13 mm). The maximum permissible clearance is .006 in. (0.15 mm). 9. Put clean SAE 30 oil on the bolt threads, washer faces and lower half of the main bearing. Put the bearing cap and lower half of the main bearing in position on the engine. Install the bolts. Tighten bolt (5) to a torque of 30 3 lb.ft. (40 4 N m). Tighten bolt (4) to a torque of 30 3 lb.ft. (40 4 N m). Put a mark on both bolt heads and the cap. Tighten bolt (4) 120° 5° more. Tighten bolt (5) 120° 5° more.10. Do Steps 1 through 9 for the remainder of the bearings. 11. Check the crankshaft end play with tooling (D). The end play is controlled by the thrust bearing on No. 4 main bearing. The end play with new bearings must be .006 .003 in. (0.15 0.08 mm). The maximum permissible end play with used bearings is .014 in. (0.36 mm).end by:a) install oil pan