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Home >> BMW >> 2003 >> 745i >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine - Repair (N62) >> Pistons With Rings And Pin >> 11 25 530 Removing and installing/replacing all pistons (N62) >> N62 B36

N62 B36

Lightly coat pistons and piston rings with oil. Offset the contact points of the piston rings by approx. 120° to each other but do not position above the piston pin boss.

Slide special tool 11 8 141 over piston (1).

Fig 1: Sliding Special Tool Over Piston
G03288856Courtesy of BMW OF NORTH AMERICA, INC.

Install piston so that arrow points to camshaft drive.

CAUTION: Danger of piston ring failure.

Only press pistons into place with finger force - do not knock in!

Attach crankpin to connecting rod.

Remove special tools 11 8 151 and 11 8 152.

Fig 2: Removing Special Tools
G03288857Courtesy of BMW OF NORTH AMERICA, INC.
NOTE: For purposes of clarity, the pairing letters (1) are shown on the removed con rod.
CAUTION: Conrods and conrod bearing caps are denoted with the same pairing letters (1), do not mix them up.
Fig 3: Identifying Pairing Letters
G03288858Courtesy of BMW OF NORTH AMERICA, INC.

Apply light coat of oil to connecting-rod bearing shells.

Fit bearing cap so that pairing letters match up.

Fig 4: Installing New Connecting-Rod Screws
G03288859Courtesy of BMW OF NORTH AMERICA, INC.

Install new connecting-rod screws.

Secure conrod with special tool 00 9 120.

Fig 5: Securing Conrod
G03288860Courtesy of BMW OF NORTH AMERICA, INC.

Tightening torque 11 24 1AZ. Refer to ENGINE - TIGHTENING TORQUES .