440 PS fluid boiling after 3 minutes at idle.

[67charger440]

Greeting all,

what would cause the PS fluid to boil 5 minutes after initial start up? Here is what I have. 66 charger with a 440 with a Saginaw pump connected to the original PS box . Could the 440 pump be pushing too much PSI for the stock gear box? Is it just a matter of running some PS cooling lines? It’s a brand new PS pump. The reason I replaced the old one was because it did the same thing!. Fluid is over 200° After Five minutes of just sitting there. I’m using ps fluid not ATF.

 

[pnora]

Does it have power assist both ways?

 

[67charger440]

Does it have power assist both ways?

Excuse my ignorance I’m not not sure what you mean

 

[pnora]

Excuse my ignorance I’m not not sure what you mean

Does it have power steering when trying to turn left and right? Does it have power assist? If so is it even both ways?

 

[440 Charger]

Greeting all,

what would cause the PS fluid to boil 5 minutes after initial start up? Here is what I have. 66 charger with a 440 with a Saginaw pump connected to the original PS box . Could the 440 pump be pushing too much PSI for the stock gear box? Is it just a matter of running some PS cooling lines? It’s a brand new PS pump. The reason I replaced the old one was because it did the same thing!. Fluid is over 200° After Five minutes of just sitting there. I’m using ps fluid not ATF.

Interesting.

 

[MIKESPOLARA]

Do you have headers that come close to any of the power steering parts?

 

[440 Charger]

Does it have power steering when trying to turn left and right? Does it have power assist? If so is it even both ways?

Cant wait to see how this thread goes.

 

[67charger440]

Do you have headers that come close to any of the power steering parts?

The number one cylinder does come close, but honestly, the PS fluid is hotter than the header at first according to my temp gun.

 

[67charger440]

Does it have power steering when trying to turn left and right? Does it have power assist? If so is it even both ways?

I haven’t tried to turn the wheel yet because it’s on jack stands and the steering linkage is unhooked because I’m doing a disk brake conversion at the same time haha. It’s literally over 200° from just sitting there idling without me turning the wheel. Could it be a air pocket problem?

 

[440 Charger]

I haven’t tried to turn the wheel yet because it’s on jack stands and the steering linkage is unhooked because I’m doing a disk brake conversion at the same time haha. It’s literally over 200° from just sitting there idling without me turning the wheel. Could it be a air pocket problem?

Learn more is my advice.

 

[oldbee]

P/s fluid foams very easily. If the steering works,no problem.

 

[MIKESPOLARA]

I haven’t tried to turn the wheel yet because it’s on jack stands and the steering linkage is unhooked because I’m doing a disk brake conversion at the same time haha. It’s literally over 200° from just sitting there idling without me turning the wheel. Could it be a air pocket problem?

Yes, air. The system hasn't been bled of air

 

[Red63440]

I would think that being a basic hydraulic pump it would need a relief valve in the system. Did you check the return line to see if it’s clear of obstructions?

 

[T2R9]

Turn the steering wheel lock to lock several times to bleed the air out. Likely a air pocket in there.

 

[440 Charger]

I would think that being a basic hydraulic pump it would need a relief valve in the system. Did you check the return line to see if it’s clear of obstructions?

If the oil boils then not fun lol.

 

[67charger440]

Learn more is my advice.

How does one learn more? By asking questions. I asked a question. Great advice by you. Must of taken you years of experience.

 

[Red63440]

Working on hydraulic systems can be very dangerous, the big systems I worked with in the steel mill could cut your arm off.

 

[440 Charger]

How does one learn more? By asking questions. I asked a question. Great advice by you. Must of taken you years of experience.

Time to learn is the best way.

 

[440 Charger]

Working on hydraulic systems can be very dangerous, the big systems I worked with in the steel mill could cut your arm off.

Easy part dont get any body part in that.

 

[OKDart]

A constant driven hydraulic pump needs a way to circulate fluid when there’s no demand or it will burn up. It will dump pressurized fluid back to the reservoir and the cycle continues. The power steering pumps don’t have a way to cool that fluid.
After so long, the reservoir fluid is going to get hot, 200 degrees doesn’t sound that bad. Not sure what the normal temp is, but I’ve seen hydraulic pumps with a failed case drain get so hot it melts the seals, and Bakes the paint off.

I would find out what normal temp should be first.