Overview - Piston And Connecting Rod: Notes
Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.
- Connecting Rod Bolts
- 45 Nm + 90°
- Replace after removing
- Use old bolt to measure radial play
- Lubricate the thread and contact surface.
- Connecting Rod Bearing Cap
- Pay attention to the installed position.
- Due to the separation procedure (cracking) of the connecting rod, the connecting rod bearing cap only fits in one position and only to the corresponding connecting rod.
- Mark affiliation to cylinder -A-
- Installed position: the markings -B- face the belt pulley side
- Disconnect the new connecting rod. Refer to NEW CONNECTING ROD, SEPARATING .
- Bearing Shells
- Installed position. Refer to Installed Position of Bearing Shell
- Do not interchange used bearing shells (mark)
- Coat with oil before installing
- Axial play new: 0.10 to 0.35 mm, wear limit: 0.40 mm
- Check radial clearance with Plastigauge®
, new: 0.02 to 0.06 mm, wear limit: 0.09 mm. Do not turn crankshaft when checking radial clearance
- Relief Valve
- Oil Spray Jet
- Locking Ring
- Piston Pin
- Coat with oil before installing
- Piston
- Compression Rings
- Use piston ring pliers (commercially available) for removing and installing
- Offset gaps by 120°
- Installed Position: "TOP" "R" mark must face up toward piston crown
- Ring Gap/Groove Clearance, Checking. Refer to PISTON AND CYLINDER BORE, CHECKING .
- Oil Scraping Ring
- Two-part
- Install offset gaps by 120° to the neighboring compression ring
- The "TOP" or "R" marking must face toward the piston crown.
- Checking the ring gap. Refer to PISTON AND CYLINDER BORE, CHECKING .
- Side clearance cannot be measured.
- Connecting Rod