Complete Engine - Overview
WARNING: This page is about a different car, the 2018 Nissan Titan XD. However, it is still accessible from the selected car via links, so may be relevant.
- It is important that oil passages are plugged and cavities are masked prior to scraping gasket material and/or cleaning the joint surfaces. Washed parts that will not immediately be assembled into the engine must be covered up to protect against contamination. Regularly clean sockets, wrenches, gauges and containers used for engine repairs. Clean the work surfaces of carts, tool boxes and tables regularly to prevent contaminations of parts.
- Before beginning repairs on a fuel system, be sure to understand the fuel flow of the engine. Pay particular attention to the last point of filtration in the fuel system. After the last point of filtration, contaminants introduced into the fuel system have no possibility of being removed before entering contaminant-sensitive fuel system components.
- Engines that have experienced engine damage because of intake air system component damage that resulted in cylinder liner and piston ring wear must be treated as if the lubricating oil system has been contaminated with debris. The engine must be disassembled and cleaned appropriately to remove debris from the oil galleries, block cavities, cylinder head, and air intake system. Camshafts, rocker arm pins and rollers must also be thoroughly cleaned and examined for wear.
- A number of joints on this engine seal with a formed-in-place gasket (FIPG). Thoroughly clean old sealant, dirt, and oil from parts before applying the sealant. Do not allow oil to contaminate the flanges before or immediately after applying the sealant. Clean all surfaces with isopropyl alcohol prior to applying sealant. Isopropyl alcohol improves the adhesion of the sealant better than brake cleaner and contact cleaner.
- Alodine is then applied to the sealing surfaces and allowed to dry before sealant is applied. Alodine promotes strong adhesion and prevents leaks.
- Always use the sealant specified, and follow the guidelines for bead width and path location. Apply the bead 1 - 2 mm (0.04 - 0.08 in) (A) from the chamfered edge of the flange, and always draw the bead on the inside edge of the bolt holes. For details on the location and quantity of sealant to apply to a component, refer to the sealant path drawing of that individual component. Do not apply more sealant than specified. Excessive amounts of sealant could clog oil passages in the engine.
- Parts must be installed and bolts hand tightened within 10 minutes of the sealant being applied. Exceeding this time will reduce the effectiveness of the sealant. Complete the torquing procedure within 30 minutes of applying the sealant.