Why would the power steering pump blow the cap off on a brand new pump I had installed to stop whining ?

not told you what fluid you did use.> why?
CAUTION: **MOPAR® Power Steering Fluid +4 or ATF+4
the clerk lied to you,. why ask a clerk anything?
learn to read both Dodge mannuals
and the service bulletins;

CAUTION: **MOPAR® Power Steering Fluid +4 or ATF+4
it tells you run only this,

and bleed it like the manual told you
20 times lock to lock
or see dodge vacuum pump bleed steps;
rockauto.com sell it

ram 1500,2500 or 3500. ????
the pump on 1500 is not the same as the other 2.
but it does show all 3 in the SB
as
**MOPAR® Power Steering Fluid +4 or ATF+4
and not to mix brands, in the SB stated and posted below, fully.
the lost users guide missing from glove box said the same.
page 382, free of charge read it.


https://www.manualslib.com/manual/40538/Dodge-2004-Ram-1500.html?page=382&term=atf&selected=1#manual





https://eautorepair.net/Marketing/Default.asp

CAUTION: If the air is not purged from the power steering system correctly, premature power steering pump failure can result. The condition can occur on pre-delivery vehicles with evidence of aerated fluid or on vehicles that have had steering component repairs.

1. NOTE: A whine heard from the power steering pump can be caused by air in the system. The power steering purge procedure must be carried out prior to any component repair for which power steering noise complaints are accompanied by evidence of aerated fluid. Remove the power steering fluid reservoir cap. Check the fluid.

1. Raise the front wheels off the floor. For additional information, refer to Section 100-02 .

1. Tightly insert the stopper of the vacuum pump into the reservoir.

1. Start the engine.

1. Install the vacuum pump, apply vacuum and maintain maximum vacuum of 68-85 kPa (20-25 in-Hg).

1. CAUTION: Do not hold the steering wheel against the stops for more than 3 to 5 seconds at a time. Damage to the power steering pump can occur. Cycle the steering wheel fully from stop to stop 10 times.

1. Stop the engine.

1. Release the vacuum and remove the vacuum pump.

1. CAUTION: Do not overfill the reservoir. Fill the reservoir and install the reservoir cap.

1. Visually inspect the power steering system for leaks.

Many new power steering pumps will exhibit a whining noise for a time after installation. Some won't. Typically, they quiet down within 2-3 weeks once they break in a bit. If the new pump is doing its job and not leaking and the whine is not more like an ear-splitting shriek, just wait it out and see what happens.

Start by checking your fluid level. Is the level between the cold/low line and the hot/high line on the dipstick?

If the level is ok, do you currently have power assisted steering? If not, or the pump whines, you may have a blockage in the power steering pump/and/or lines, and should go to the mechanic to fix.

Lastly, if both those above are not the problem, it could be simply that the power steering cap/dipstick doen not seal properly to the power steering housing. There is a rubber or plastic seal under the cap to prevent fluid from escaping. If it is damaged/split/chipped ... you will need a new cap/dipstick.

Did that solve your problem?

hi Eva.
As you turn your steering wheel it is this fluid pressure that aids in turning the wheels of your car. ... If the pump impeller is trying to move power steering fluid and starts catching air bubbles it can cause whining noises and vibrations to occur.
Maybe you've heard it at a stop light. Maybe you've heard it as you pass a car on the freeway. Or maybe you've heard it in the parking lot at work when someone is leaving. The unmistakable whine of a power steering pump can make even the most confident mechanic wonder when that car will breakdown.
Power steering pump noise is a unique noise that your car may make and once you've heard it you always know what it is. The noise is a mix of a whirring and a whining and will always vary with the speed of your engine whether your car is driving or in park. This whining noise can be subtle or extremely loud and may be worse in colder weather, or right when you first start your car.
Power steering pumps are most often vain style centrifugal pumps that are tasked with pressurizing the power steering fluid and pushing it down to your power steering gear or rack. As you turn your steering wheel it is this fluid pressure that aids in turning the wheels of your car.
There are a few reasons why you are hearing power steering pump noise from your car. First, it may simply be due to the design of the pump. Sometimes, noisy power steering pumps can continue to work flawlessly for years after they start making noise. This may simply be due to the manufacture's design or a tight tolerance in that particular pump. In this case, you would hear the noise but not see any other adverse effect like a loss in power steering, leaking fluid or a wobbly pulley. In this case, you may be able to help reduce your power steering pump noise by choosing a different type of power steering fluid, like a synthetic fluid.
Your power steering pump may also be making noises due to air trapped in the system. If the pump impeller is trying to move power steering fluid and starts catching air bubbles it can cause whining noises and vibrations to occur. Even tiny air bubbles you cannot see that are trapping in the power steering fluid may be causing the whining you are hearing. In this case, the best thing to do is flush your power steering system to try and remove the air from the system. Having air trapped in your power steering system can be difficult to diagnose so you may need to simply try a power steering flush to see if it solves your problem.
Power Steering pump noise may also be due to a failing power steering pump. As the bearings on the impeller go bad it will start to make noise as the pump is turning. If you have a bad power steering pump you usually will also experience leaks from around the pulley, a wobbly pulley, or difficulty turning the steering wheel when you are stopped. If you have multiple of these symptoms together, it is probably time to replace your power steering pump.
Lastly, and most usually, a whining power steering pump is an indication of a low fluid level. Your power steering fluid is probably something you have rarely if ever checked, so it often comes as a surprise if the level is low. Your power steering fluid reservoir is also relatively small so even a slow leak will cause a low fluid level relatively quickly. To confirm this is your problem it is as simple as checking your power steering fluid level. Some power steering reservoirs are clear so you can see through them to check how full they are. You may have to wipe away some dirt and grime to find the "full" line, but it should be easy to check. If you have an opaque power steering fluid reservoir there should be a small dipstick under the cap that will help you measure the fluid level. If it is low, then you have a leak somewhere and topping off the fluid should quite down your power steering pump.
If you discover a power steering leak, rather than simply continuing to add fluid every time it gets low, you should fix the problem permanently so you don't have to continue to check your power steering fluid level. Replacing lines or seals can be a surprisingly difficult task due to the location of your power steering pump and steering gear or rack. The easiest way to seal your leak is to do it from the inside out!

or check this link out for more info on this matter.
Power steering whining sqreeching Google Search

You must bleed the system of air when refilled with the wheels off the ground turn the wheels from side to side but don't go all the way to the stops just a half a turn from center each way the fluid level might be low and you don't know it but if it's all the way full and still whining check for hose kinks if none the pump might be an old one and the loss of fluid may have damaged it and it needs replacement

normally, the only part of your automatic transmission that will make a whining noise is the pump. it usually whines when iether the fluid is low or more commonly when the transmission oil filter is getting plugged up.

the power steering pump will also make a whining noise too.

turn the wheel all the way to the right and hold steady pressure against the stop. this puts maximum force on the power steering pump and, if the power steering pump is the one making the whine, it will change the sound of it. (usually louder).

if the trans pump is making the whine noise, it should sound different in neutral compared to drive. this test will really only work if it make the noise without the vehicle moving. if it wont do it at idle hold the rpms at 2000 or so.

if you decide the noise is coming from the transmission, and the transmission filter has not been replaced (assuming you installed a used transmission), replace the filter by removing the oil pan.



oh and also, if it is the power steering pump you should be able to make it make the whining noise while the vehicle is stationary. if it wont make noise unless its moving its not the power steering pump.

u have a defectgive power steering pump, check the fluid level 1st, if that is ok flush the system and replace the pump, this will require a special power steering pulley puller and installer tool.

A power steering pump will whine if it is low on fluid, when you turn the wheels you will hear the whine or if the power steering belt is to tight you will also hear the whine. You will not hear this whine when the truck is stopped.

The whining noise is typically caused by air in the system.

1) Raise the front of the vehicle off the ground. It will be easier to bleed air from the system.

2) Remove the reservoir cap, with the engine off, turn steering wheel completely to the left all the way to stop and then completely to the right all the way to stop. Repeat this several times to rid the system of all the air. Return the wheel to center.

3) Leave the cap off the reservoir and let set for an hour or more if possible. The air in the reservoir will rise to the top. Check the fluid level and fill as necessary.

Good luck, let me know.
Regards,