Is the oil pressure gauge incorrect or malfunctioning? Is the engine oil in the crankcase diluted or of the improper viscosity? Is the pump worn or dirty? Is the oil filter plugged? Is the oil pickup screen loose or plugged? Are there any holes in the oil pickup tube? Are the bearing clearances more than the specified values?
Crankshaft 0. Connecting Rod 0. Go to Step 21 Go to Step 22 21 Replace the bearing, if necessary. Are the oil galleries cracked, porous or plugged? Are any of the gallery plugs missing or installed improperly? Is the camshaft worn or is there evidence of poor machining? On some occasions, a fluid leak may be difficult to locate or repair.
The following procedures may help you in locating and repairing most leaks. Finding the Leak: 1. Identify the fluid. Determine whether it is engine oil, automatic transmission fluid, power steering fluid, etc. Identify where the fluid is leaking from. After running the vehicle at normal operating temperature, park the vehicle over a large sheet of paper.
Wait a few minutes. Find the approximate location of the leak by the drippings on the paper. Visually check around the suspected component. Check around all the gasket mating surfaces for leaks. A mirror is useful for finding leaks in areas that are hard to reach. If the leak still cannot be found, it may be necessary to clean the suspected area with a degreaser, steam, or spray solvent. Thoroughly clean the area. Dry the area. Operate the vehicle for several miles at normal operating temperature and varying speeds.
After operating the vehicle, visually check the suspected component. If you still cannot locate the leak, try using the powder or black light and dye method. Powder Method: 1. Clean the suspected area. Apply an aerosol-type powder, such as foot powder , to the suspected area. Operate the vehicle under normal operating conditions. Visually inspect the suspected component. Trace the leak path over the white powder surface to the source. Black Light and Dye Method: A dye and light kit is available for finding leaks.
Pour the specified amount of dye into the engine oil fill tube. Operate the vehicle under normal operating condi- tions as directed in the kit. Direct the light toward the suspected area. The dyed fluid will appear as a yellow path leading to the source. Repairing the Leak Once the origin of the leak has been pinpointed and traced back to its source, the cause of the leak must be determined in order for it to be repaired properly.
If a gasket is replaced, but the sealing flange is bent, the new gasket will not repair the leak. The bent flange must be repaired also.
Before attempting to repair a leak, check for the following conditions and correct them as they may cause a leak. D The crankcase ventilation system is malfunctioning. D The fasteners are improperly tightened or the threads are dirty or damaged. D The flanges or the sealing surface is warped. D There are scratches, burrs or other damage to the sealing surface. D The gasket is damaged or worn. D There is cracking or porosity of the component.
D An improper seal was used, where applicable. D The seal bore is damaged, scratched, burred or nicked. D The seal is damaged or worn. D Improper installation is evident.
D There are cracks in the component. D The shaft surface is scratched, nicked or damaged. D A loose or worn bearing is causing excess seal wear. Heavy knock is usually very loud and the result of broken or excessively worn internal engine components. Light knock is a noticeable noise, but not as loud. Light knock can be caused by worn internal engine components.
Was this file useful? Share Your thoughts with the other users. User ratings and reviews for this file: Date User Rating Comment. Schematics 4 Free. Service manuals, schematics, documentation, programs, electronics, hobby S earch.
B rowse. U pload. W anted.
0コメント