![]() ![]() We are your resource or the best information on power steering. Post a question in our Ask the Experts forum to hear from our technicians. It took me quite awhile to figure out exactly where it was leaking from. Whatever questions you have concerning power steering, we’re here to help. Often times vehicle manufacturers have specific bleeding or purging process required in order to remove all air from the power steering fluid system. If you develop this type of power steering fluid leak, you need to bleed or purge your power steering system of any air. What is happening is that while the vehicle is running the air is condensed and pressurized from the power steering pump and fluid being forced through many small cavities in the system, but once the system is turned off and the pressure is reduced the air has an opportunity to expand, causing fluid to push its way through the vent on the power steering reservoir cap. The reason this type of leak develops is from too much air being in the system. This type of leak will be more common after replacing a component in the vehicle like the power steering fluid cooler. On a rarer occasion you may develop a leak from the power steering reservoir cap when the vehicle is shut off. Sometimes Ultra Violet dye will be used in conjunction with a black light in order to locate a leak. If after thorough inspection is performed you cannot find where it is coming from, you will want to degrease or clean the system thoroughly in order to find the leak easier. If you find that your vehicle is leaking power steering fluid while off, it is best to first do a thorough examination of the power steering system and see if you can find any obvious leaks. These types of leaks can often times be easy to diagnose, and fix because the leak is obvious.Ī power steering system that leaks fluid while the engine is off can be difficult to diagnose because the pressure is not as severe, resulting in a leak that is not always obvious. Older seals and gaskets will wear out over time and develop leaks when put under pressure, but once the vehicle is turned off, and the power steering system pressure subsides, the leak will stop. The reason for that is because the system is under pressure while the engine is running. Normally power steering leaks will be present when the vehicle is running. ![]()
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