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Old 03-20-2008, 03:30 PM
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installing power steering using gm pump and t/bird Rack

I have installed a 5.7 Ls1 in a 36 chev with 85 t/bird rack and a stock late model pump [02]
My problem is I had to change the size of the pump pully from the stock 6 3/8" to a 5 1/4" to get fender clearance,
Now after I have everything hooked up , I filled the pump up with fluid and cycled it from lock to lock before starting the motor, then I started the motor,, as soon as I tryed to turn the steering wheel. it jerked it out of my hands and kicked from lock to lock violently till I shut the motor off,
What would cause this problem ? the fluid level has gone down to about 1/2 full.

Could the problem be from changing the pully to a smaller one that speeded up the pump rotation? which would make it quicker ? or possably a air lock?

any help would be appreciated.....
Thanks Bill

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Old 03-20-2008, 04:04 PM
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I would start the motor in then fill it,(have some fluid in it before starting).Then turn it back and fourth,while running.keep checking fluid.
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Old 03-20-2008, 04:35 PM
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It was full of fluid before I started the motor,, it went down to about half full, at the present time I am letting it sit and hopefully any air in the lines will come to the top and dissipate,, [
Actually I am thinking my problem is that I changed the pulley size, by a total of 1.75 " in circumstance, which means the pump is spinning faster than stock,, and will be Quicker, but it souldn't be that quick, it just jerks the wheel violently from lock to lock
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Old 03-21-2008, 09:34 AM
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I don't know but, what about rechecking the lines, supply and return. Do you have them connected in the right ports? TF
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Old 03-22-2008, 08:49 AM
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Was that the Summit serpentine pulley? I'm thinking about getting that one for mine, it matches the S&P pulleys...

Really, I cannot imagine just changing the pulley size would cause that! I've never seen that happen before in any case. I'd look for lines hooked up wrong.

Have you driven it yet? How'd it do with the stock pulley? This is the same setup I'm running, but I 'hear' that the GM pump runs ~ 200 PSI higher than the Ford which causes steering effort to be pretty light. Mine's still apart...

Russ
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Old 03-22-2008, 12:51 PM
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Problem solved,,, the lines were hooked up wrong ,, the steering works great now,, the pressure seems fine ,, altho I havn't driven the car yet, but it turns very smooth,, AND yes it is serpentine,,,,
The pully I used is 1.75 " smaller in diameter. and is a stock GM . that is used on the V-6 motors, shaft size is the same and is a perfect fit.. dorman pully with NAPA part #7-3033, black plastic, made in CHINA of course

Thanks for ALL the help guys, I really appreciate it
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