Before removing the piston, first take off the negative cable from the battery. After that, pull off the
Oil Pan and its gasket/windage tray, the cylinder head covers, the timing chain cover and cylinder head(s). Should this step be needed, turn a reliable reamer into the ridge of the bore and cover the tops of those pistons with it. First, you need to remove the piston and connecting rod from the top of the cylinder block and move the
Crankshaft to ensure every connecting rod is in the cylinder's center as you remove it. Do not use a number stamp or punch on the connecting rods or caps to prevent damage and use a permanent ink marker or scribe tool to show the positions, not harming the fractured joint surfaces. With Special Tool 8507 Connecting Rod Guides installed into the connecting rod being replaced, loosen the piston and take it out of the cylinder bore and repeat with each piston. After you have removed the bearing, place the bearing cap on the connecting rod right away to prevent harm. When cleaning, do not use a wire wheel or abrasive device on the pistons or connecting rods because of the Moly coating; instead, soak the pistons in a suitable solvent in warm water and dry with a towel, using a wood or plastic scraper for the grooves in the piston ring without taking out the piston pin. Check the journal inside the connecting rod for signs of extra wear, taper and scoring and look at the connecting rod itself for any twist or bend. For installation, the piston rings should be set before the piston and connecting rod assemblies are put into the bore and the piston head and rings are covered in clean engine oil. Use a ring compressor to hold the piston and rings together before you begin to tighten them, so the rings don't change position. Match the location of the hole in the bearing shell with that of the connecting rod and smear clean engine oil on the bearing surface. Drop in Special Tool 8507 Connecting Rod Guides into the connecting rod bolt thread holes. An "F" is stamped above the piston pin bore surface to show which way the pistons should be installed. They should all face the front end, along with the oil slinger slot, of the engine on both side banks. Apply engine oil and clean the cylinder bore, spin the crankshaft until the connecting rod journal is in the center and then gently insert both the rod and piston, ensuring the rod slides right onto the journal. Hold the connecting rod and start the piston at the top of the cylinder bore, then tap the piston down with the hammer handle as you guide the rod. Bossa abandons Connecting Rod Bolts every time they are used since they are Torque to Yield; never try to reuse them after removal. Coat the rod bolts and bearing parts with engine oil, place the cap and bearing on the rod and secure with bolts tightened to 27 Nm (20 ft. lbs.) plus 90°. Once done, replace the cylinder head(s), timing chain and cover, cylinder head covers and oil pan and gasket/windage tray, pour the required engine oil into the crankcase and reattach the negative cable to the battery.