Crankshaft: Testing and Inspection
CONNECTING ROD AND CRANKSHAFT1. Check the connecting rod end play.
Using a feeler gauge, measure the end play while moving the connecting rod back and forth.
^ If out-of-tolerance, install a new connecting rod.
^ If still out-of-tolerance, replace the crankshaft.
2. Check the connecting rod bearing oil clearance.
1) Check the matchmarks on the connecting rod and cap are aligned to ensure correct reassembly.
2) Remove 2 connecting rod cap bolts.
3) Remove the connecting rod cap and bearing half.
4) Clean the crank pin and bearing.
5) Place plastigage across the crank pin.
6) Reinstall the bearing half and cap, and torque the bolts.
Tightening torque 19.6Nm (2.0 kgf.m, 14.46 lb-ft) + 90 degrees
NOTE: Do not turn the crankshaft.
7) Remove 2 bolts, connecting rod cap and bearing half.
8) Measure the plastigage at its widest point.
9) If the plastigage measures too wide or too narrow, remove the upper half of the bearing, install a new, complete bearing with the same color mark (select the color as shown in the next column), and rech6ck the clearance.
CAUTION: Do not file, shim, or scrape the bearings or the caps to adjust clearance.
10) If the plastigage shows the clearance is still incorrect, try the next larger or smaller bearing (the color listed above or below that one), and check clearance again.
NOTE: If the proper clearance cannot be obtained by using the appropriate larger or smaller bearings, replace the crankshaft and start over.
CAUTION: If the marks are indecipherable because of an accumulation of dirt and dust, do not scrub them with a wire brush or scraper. Clean them only with solvent or detergent.
IDENTIFICATION OF CONNECTING ROD:
CRANKSHAFT PIN MARK LOCATION IDENTIFICATION OF CRANKSHAFT:
DISCRIMINATION OF CRANKSHAFT:
PLACE OF IDENTIFICATION MARK (CONNECTING ROD BEARING) UPPER:
LOWER:
IDENTIFICATION OF CONNECTING ROD BEARING:
11) Selection
3. Check the crankshaft bearing oil clearance.
1) To check main bearing-to-journal oil clearance, remove the main bearing caps and bearing halves.
2) Clean each main journal and bearing half with a clean shop tower.
3) Place one strip of plastigage across each main journal.
4) Reinstall the bearings and caps, then torque the bolts.
1) Install and uniformly tighten the bearing cap bolts, in several passes, in the sequence shown.
Use the SST (09221-4A000 ), install main bearing cap bolts.
Tightening torque
Main bearing cap bolt
Bolts (1 - 8)
49.00 Nm (5.0 kgf.m, 36.16 lb-ft) + 90 degrees
Bolts (9 - 16)
19.60 Nm (2.0 kgf.m, 14.46 lb-ft)+ 120 degrees
Bolts (17 - 22)
29.40 - 31.36 Nm (3.0 - 3.2 kgf.m, 21.70 - 23.14 lb-ft)
NOTE:
^ Always use new main bearing cap bolts.
^ If any of the bearing cap bolts are broken or deformed, replace it.
NOTE: Do not turn the crankshaft.
5) Remove the cap and bearing again, and measure the widest part of the plastigage.
6) If the plastigage measures too wide or too narrow, remove the upper half of the bearing, install a new, complete bearing with the same color mark (select the color as shown in the next column), and recheck the clearance.
CAUTION: Do not file, shim, or scrape the bearings or the caps to adjust clearance.
7) If the plastigage shows the clearance is still incorrect, try the next larger or smaller bearing (the color listed above or-below that one), and check clearance again.
NOTE: If the proper clearance cannot be obtained by using the appropriate larger or smaller bearings, replace the crankshaft and start over.
CAUTION: If the marks are indecipherable because of an accumulation of dirt and dust, do not scrub them with a wire brush or scraper. Clean them only with solvent or detergent
Crankshaft bore mark location
Letters have been stamped on the block as a mark for the size of each of the 5 main journal bores.
Use them, and the numbers or bar stamped on the crank (marks for main journal size), to choose the correct bearings.
DISCRIMINATION OF CYLINDER BLOCK:
CRANKSHAFT JOURNAL MARK LOCATIONDISCRIMINATION OF CRANKSHAFT:
DISCRIMINATION OF CRANKSHAFT:
PLACE OF IDENTIFICATION MARK (CRANKSHAFT BEARING):
DISCRIMINATION OF CRANKSHAFT BEARING:
SELECTION:
4. Check crankshaft end play.
Using a dial indicator, measure the thrust while prying the crankshaft back and screwdriver.
If the end play is greater than thrust bearings as a set.
Thrust bearing thickness 2.41 - 2.45 mm (0.0949 - 0.0964 in.)
5. Inspect main journals and crank
Using a micrometer, measure main journal and crank pin.
Main journal diameter: 68.942 - 68.960 (2.7142 - 2.7149 in.)
Crank pin diameter: 54.954 - 54.972 (2.1635 - 2.1642 in.)
CONNECTING RODS
1. When reinstalling, make sure that cylinder numbers put on the connecting-rod and cap at disassembly match. When a new connecting rod is installed, make sure that the notches for holding the bearing in place are on the same side.
2. Replace the connecting rod if it is damaged on the thrust faces at either end. Also if step wear or a severely rough surface of the inside diameter of the small end is apparent, the rod must be replaced as well.
3. Using a connecting rod aligning tool, check the rod for bend and twist. If the measured value is close to the repair limit, correct the rod by a press. Any connecting rod that has been severely bent or distorted should be replaced.
Allowable bend of connecting rod: 0.05 mm / 100 mm (0.0020in./3.94 in.) or less
Allowable twist of connecting rod: 0.1 mm / 100 mm (0.0039 in./3.94 in.) or less