6.7L Cummins Cooling System – Coolant Heater – General Information
Some heaters will operate continuously when plugged into the correct voltage electrical socket. Operate them only when the ambient temperature is below 0°C [32°F].
Some heaters will operate continuously when plugged into the correct voltage electrical socket. Operate them only when the ambient temperature is below 0°C [32°F].
Route the drive belt on the engine using the belt diagram created in the Remove section. Do not install the belt over the water pump pulley at this time. Pivot the tensioner in the direction of the spring tang and install the drive belt, slipping the belt over the water pump pulley last. Slowly release… Read More »
Inspect the drive belt for damage. Transverse (across the belt) cracks are acceptable. Longitudinal (direction of belt ribs) cracks that intersect with transverse cracks are not acceptable. If the belt is frayed, punctured, or material is missing, the belt is unacceptable for reuse and must be replaced. Inspect the belt grooves for: • Embedded debris… Read More »
The belt tensioner winds in the direction that the spring tang is bent over the tensioner body. To loosen the tension on the belt, rotate the tensioner to wind the spring tighter. NOTE: Make a diagram of the belt arrangement prior to removing the drive belt. This aids in installation and proper routing of the… Read More »
NOTE: This content in this section is generic and may not apply to all available cooling fan drive belt systems. The following section contains diagnostic information and procedures to aid in identifying drive belt and accessory drive issues. These issues may include: • Belt noise (squeal and chirp) • Belt tracking Oumping) • Belt fraying… Read More »
Due to the number of drive belt arrangements, this procedure does not cover all available cooling fan drive belt routing. To make sure the cooling fan drive belt is routed correctly upon installation, make a diagram of the cooling fan belt routing prior to removing the belt as shown in the illustration. The cooling fan… Read More »
Use the labels applied in the remove step to align the lubricating oil lines. Install the lubricating oil filter lines to the filter head adapter and tighten finger tight. If labels were not applied, the supply line is the outer connection and the return line is the inner connection. Tighten the lubricating oil lines on… Read More »
Label the lubricating oil lines before removal. The labels will help ensure a correct installation. Disconnect the lubricating oil lines from the lubricating oil filter head adapter. Disconnect the oil lines from the remote-mounted lubricating oil filter head. Inspect the hoses and o-ring sealing surfaces for damage.
The following procedure is for engines with a remote- mounted oil filter option. The mounting location of the oil filter will vary by application. Refer to the OEM service information for the location of the remote oil filter.
Lubricating Oil Pressure When the diagnosing lubricating system malfunctions, check all obvious items related to oil pressure, such as gauges, high and low oil level, excessive oil contamination, and oil viscosity. High lubricating oil pressure occurs after the engine is first started in cold weather. Cold-start oil pressure typically will be approximately 689 to 827… Read More »