![]() The problem possibly could the result of a failed head gasket. If you find that you're having these problems, it's usually the most economical to change the compressor. This can be caused by the oil being passed by the air compressor burns in the discharge line and eventually blocks it off. It's normal for the air dryer to collect some oil but if the dryer is maintained regularly it's easy to spot what would be considered excessive.Īnother possible symptom is that the air system builds air slowly. When the air compressor is leaking oil internally, one of the first noticeable symptoms is that the air dryer is passing oil. Why Is My Air Compressor Leaking Oil Internally / Externally? Oil Leaking Internally: You need some mechanical skills to swap out these parts, but it's usually a straightforward fix. Head gasket repair kits are available for most air compressors, as are replacement fittings or the o-rings for the fittings. If you get really stumped, buy a bottle of coolant dye and use a black light to find the source. Larger leaks will have a clean area where normal road grime has been washed away. Many times a slow leak will show as a white stain left by the evaporating coolant. In order to find the leak, you will need a can of break clean, a mirror, and a good light. In some rare cases the leak can be contributed to a cracked head. If the air compressor is leaking coolant externally, it's probably either a head gasket or a fitting. If it's a high hour/mileage compressor, it's usually the most cost effective to change it out. If the compressor is found to be at fault you now have the option of trying to find the source of the leak or just changing out the compressor. This way the truck owner has a better chance of noticing excess water/coolant in the tanks or dryer and can alert the mechanic. The truck owner can help prevent this by regularly draining the air tanks and servicing the air dryer. In some cases the air compressor may have a cracked head or develop a hole in the cylinder wall.Ī large problem is that since the engine and the air compressor share the same coolant, many times a mechanic will go after the engine as the source of the coolant loss. Most of the time, an internal diesel air brake compressor coolant leak is the result of a failed head gasket. Why Is My Air Compressor Leaking Coolant Internally / Externally? Coolant Leaking Internally: If you're in the market, browse our quality selection of new air compressor drives.Īnd If you're having problems with leaking oil or coolant in your compressor, below are some simple fixes to common issues. There are always exceptions and rare occurrences, but these should be able to diagnose most leaking oil/coolant issues. These checks and tests are meant to be a quick and simple way to test a diesel brake air compressor and determine its functionality. ![]()
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