H3 08 Hummer H3 5cyl

[John Lu Hernandez]

I just replaced my power steering pump the other day but yesterday it started leaking fluid again, so i bought a new cap for it but it still leaking fluid from the top, am i suppose to bled it some where, i was gonna buy a new line for it, but i dont see anything wrong with the lines, just bubbles up,and leaking from the cap as i see it. can some one please help a soldier out . thanks

 

[SuperBuickGuy]

how full did you fill the tank?

 

[Best4x4]

You have air in your PS system. Raise both front tires up off the ground and turn the wheel lock to lock to get the air out. If u don't get the air out you'll mess up the new pump or steering rack.

 

[4speedfunk]

Best4X4 is right...you got air in your PS system. It can be a beyotch to remove, and it is very bad for your PS pump. Unlike brake systems which typically have get "bubbles" trapped in the lines...power steering systems actually whip your fluid into a creamy froth. This makes it very hard to purge the air out. I've used several methods and by far...the best method around is to use a vacuum pump. Go to AutoZone and buy a hand vacuum pump (sometimes called a power-bleeder). Get a spare cap that fits the H3 PS resevoir...drill a small hole it...hook it up to the vacuum pump via the small 1/4" flexible tubing...pump it down to approx. 15 in of vacuum and let it sit for 5 minutes. Done!

Do this with the engine off. No need to drive around and cycle the steering, risking possible damage to the pump. Not only is it faster but, it works 1000 times better. There will be ZERO screeching, and ZERO air left in the system. The negative pressure will actually "de-froth" your fluid and turn it back into a liquid state, which is the key to getting it working properly. Once you try this...you'll never go back to any other method. Here's a video of a clever guy that chose to use engine vacuum, rather than a hand-pump...but the principal is the same....

https://www.youtube.com/watch?v=egzQYcxaPGU