Power Steering fluid BLOWN OUT! - Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum



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  #1  
Old 04-17-2007, 10:01 PM
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Power Steering fluid BLOWN OUT!

Today while I replaced my front passenger side wheel bearing and hub on my 02 Voy, I decided that it was time to flush my power steering fluid again. I did it last about 20,000 miles ago (1.5 - 2 years ago).

First off I had a clear container to drain it into so I could see what its all about. As I was turkey basting it out of the reservoir it looked horrible - looked like a milk shake, although it was awfully thin. Then there were blobs of something - to me it looked like chunks of sludge coming out of my reservoir!
I drained it really good, refilled with Valvoline syn power steering fluid which is the same thing I used last time, ran it down the highway, brought it home and drained it again. Still, chunks of stuff were coming out. I put them between my fingers and it just felt slimy. Not gritty, I didnt note any metal pieces but looking down in my PS reservoir you could see a ton of "sludge" in there Has anybody else experienced this before?
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  #2  
Old 04-17-2007, 10:39 PM
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I replaced my Power Steering Pump at 40K ish miles and didn't notice it I never bled the power steering, is there a way to do it? Every time the steering becomes slightly harder, I open the reservoir and I hear a sound of compressed air rushing out
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Old 04-17-2007, 10:46 PM
Abelcastro1 Abelcastro1 is offline
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Yea same here everytime I check the PS fluid when I twist the cap I hear that is under pressure. Sometimes when I get off the highway I loose the power steer and I hear a high whinning noise thats driving me crazy. Now that i hear there's sludge in the reservoir I would definetely change mine soon, will see what I find there hopefully that fixes the problem.
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Old 04-17-2007, 11:02 PM
ScarabEpic22 ScarabEpic22 is offline
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Weird, never seen any sludge in my PS fluid nor did I see any when I replaced the PS pump.
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Old 04-18-2007, 12:13 AM
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Don't replace the whole unit. Just take off the reservoir and clean it out. It should save you lots of $$
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Old 04-18-2007, 06:30 AM
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The fluid condition doesn't sound good:
• Milky fluid - water
• Brown fluid - burnt
• Plastic debris or dirt chunks

If I were you, I'd do a complete flush; doing it by just replacing the reservoir fluid is going to continually contaminate your new fluid. Follow this procedure & let us know how you make out:

Quote:
1. Raise the front end of the vehicle off the ground until the tires and wheels turn freely
2. Place a large container under the fluid return hose in order to collect the draining fluid.
3. Remove the fluid return hose at the power steering pump reservoir inlet connection.
4. Plug the reservoir return hose inlet connection on the power steering pump.

Important: This step may require 4 L (4 qt) of power steering fluid until the draining fluid appears clear.
5. With the key on engine off, turn the steering wheel fully to the left and to the right while an assistant maintains the minimum fluid level in the reservoir using new approved power steering fluid. Continue until the fluid from the return hose runs clear.
6. Remove the plug from the pump reservoir inlet connection and install the fluid return hose to the pump reservoir.

Important: Do NOT run the engine without the power steering fluid at a minimum system level.
7. Bleed the power steering system by (Key on engine OFF) turning the steering wheel from stop to stop 12 times, verify proper fluid level, and start the engine. Rotate the steering wheel from left to right & check for sign of cavitation or fluid aeration (pump noise/whining). Verify the fluid level. Repeat the bleed procedure if necessary.
8. Inspect the power steering fluid for contamination
9. If the fluid is still contaminated, repeat steps 1-8.
10. Lower the vehicle and check the Power Steering system for leaks.
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  #7  
Old 04-18-2007, 10:39 AM
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Nice write up, I think I should do that. Mine was a brownish black color
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  #8  
Old 04-18-2007, 01:26 PM
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Hehehe... yeah. DEFINATELY do this procedure with the engine off. I recently did a PS system flush on my windstar... well attempted a 'flush' anyway. I disconnected the rubber return line to the reservoir, routed it into a jug, got the front end off the ground & had the missus START the van. My intent was to have her cycle the wheel lock to lock while I added fresh PS fluid. NOT!! As soon as the engine fired up, the hose blew out of my jug and blasted hot, nasty fluid ALL OVER the place. Whadda mess! Do it with the truck off.

Joel
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