Fit tool 18G 1370 over the front gear, lubricate its external surfaces and ease the assembly rearwards
until the main bearing carriers are clear of their housings.
You will need an assistant to help you with this operation.
Remove the main bearing carriers and then withdraw the crankshaft from the block.
The crankshaft bearings and oil galleries should be checked in the normal manner. The journals can be
ground to the one undersize dimension for which 0.25mm (0.010 in) oversize bearings are available.
In the case of the front and rear one piece main bearings you will need tool 18G 1373 to pull out the
old ones and to fit the new ones.
Next assemble the main bearing carriers, torque tightening the bolts to 5.5 kgf.m. (40 Ibf.ft.). Then
check the internal bore using an inside micrometer or dial gauge to check for distortion. The bore
should be within the range 67,670 - 66,687mm (2.662 - 2.663 in).
One further test should be carried out on the carriers to check that the piston cooling jet valve is
functioning correctly. Apply a pressure of 1.5 - 2.0 kgf/cm2 (20 - 28 Ibf/in2) to the inlet side of the
valve. It should open. Where you come across a faulty valve drift it out and fit a new one having first
coated it with an approved compound.