Question about 1993 Toyota 4Runner

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Motor Oil Leak in the back area of my 4runnerany advice?

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  • i_virella Apr 06, 2011

    Do you think that the use of one of the engine oil chemical product for rear main seal repair leaks will be good?



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A possible problem could be the crankshaft oil seal. that you can found at the lower back of the engine. where the trans axle (transmission) attach to the engine. it's a major job that need to be the work of under chassis mechanic.

Posted on Apr 06, 2011


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Let's start by telling you how to diagnose the problem.

Most oil leaks are easily located and repaired by visually finding the leak and replacing or repairing the necessary parts. On some occasions a fluid leak may be difficult to locate or repair. The following procedure may help in locating and repairing most leaks.

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? Identify the fluid, determine whether it is engine oil, automatic transmission fluid, power steering fluid, etc.
? At what location or point is the fluid leaking from? After running the vehicle at normal operating temperature, park the vehicle over a large sheet of paper, After a few minutes, you should be able to ascertain the approximate location of the leak by the drippings on the paper.
? Visually check around the suspected component. Check around all gasket mating surfaces and hoses for leaks. If your car provides engine oil cooling, check the oil lines leading to the radiator. 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. Most car washes provide this service or make it possible for you to do it yourself. Clean the area well, then dry the area. Operate the vehicle for several miles at normal operating temperatures and varying speeds. After operating the vehicle , visually check the suspected component. If you still cannot locate the leak, try using the power method.

The Powder Method

? Clean the suspected area.
? Apply an aerosol-type powder, e.g., face powder, to the suspected area.
? Operate the car under normal operating conditions.
? Visually inspect the suspected component. You should be able to trace the leak path over the white powder surface to the source.

Good luck and all the best


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