Manager Forum

Put in a new 5.7 motor; new power steering pump, pressure hose, cooler.

At rest position, the power steering makes a noise that travels up the columm. Turn the wheel just a short hair and noise is gone.

What is it??

new belt tensioner with new engine or did you reuse old one?

used the old tensioner that came off the old motor. replaced everything else though....pump...lines...cooler. sounds like a hissing that travels up the column....it goes away the min you just think about turning the wheel.
thanks
john

Are you using the correct fluid? It calls for AF+4. I know from past experience if the correct fluid is not used strange things happen. I suppose the lines are hooked up correctly? Sometimes they can be interchangeable.

hth

sounds like the pump. I'd yank it and install another. i almost thing you may be able to swap the relief valve with the one in the original pump and the problem may be resolved. however if the bore in the pump isn't perfect then you may be wasting your time. it may be a fluid issue but it sounds like the pump is straining with no place to go until you move the wheel and box accepts the pressure. pump isn't loose is it? i've seen bolts finger tight and pump will vibrate in mount. done this myself

checked the lines, hooked up correct. cant cross different fittings. put on 2 pumps noise still there....drained fluid...no difference....never seen this before. lol....a first for my shop. short of changing the steering box, dont know why the noise is there.

Now, here is where I go back to the basics an start all over. I'm missing something. Here is a rather ignorant question.

What was the reason that the engine and power steering pump was replaced? Was this noise/condition existing prior to all this?

replaced the motor due to head gasket leaking and blown and motor was knocking. replaced pump due to unknown noise. thought that might be it.

update to my problem....flushed and changed fluid to af+4 no difference....when at rest sound like a fluid restriction noise coming up thru the coloum.....everything is new and still there...lol...any more ideas?

gator automotive wrote:replaced the motor due to head gasket leaking and blown and motor was knocking. replaced pump due to unknown noise. thought that might be it.

Ok. Thanx for the info. So we had 2 problems initially.

Now then, I at this point would be checking all the mounting hardware closely on all involved components (steering box, steering shaft and column). If that is good, I'd next be checking the pump pressure. If nothing else so that I know what it is, even though the pump obviously is not at fault. Without diagnosing this problem myself, I'd be suspicious of a gearbox issue.

Does this truck perchance have a hydro boost for the brakes? If it does, that is another potential area to diagnose.

ok, now that the two issue card has been tossed out if someone has been trying to adjust box your problem could be there. if the box is out of center or to tight it will cause an issue like this.