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Rack and pinion power steering

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Old Dec 2, 2023 | 05:17 AM
  #1  
Tim Newton's Avatar
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From: Australia
Car: Corvette 1958
Engine: GM LB9 TPI 1985
Transmission: TH700R4
Rack and pinion power steering

Can anyone identify the large hex plug on the underside of the power steering rack. See pic.
I have a modified car with mostly 1990’s GM parts including the power steering.
Is this bolt for adjusting the the operation of the rack and pinion or is it a fluid drain.
I need to flush the system and cannot find any reliable info whether this set up has a drain or whether flushing must be done using the low pressure return line.

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Old Dec 2, 2023 | 04:54 PM
  #2  
T.L.'s Avatar
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From: Colorado USA
Car: '83 Firebird (T/A Clone)
Engine: 350 with L-69 components
Transmission: 700R-4, 2000 RPM stall converter
Axle/Gears: 10-bolt/3.73 ..
Re: Rack and pinion power steering

SMH......
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Old Dec 3, 2023 | 11:18 AM
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From: Armstrong B.C.
Car: 1991 camaro Z28
Engine: Forged 370" LS turbo s488
Transmission: Built 4L80e FTI converter
Axle/Gears: MWC 9" 35 spline 3.25 gears
Re: Rack and pinion power steering

Originally Posted by T.L.
SMH......
What are you shaking your head at??
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Old Dec 4, 2023 | 10:54 PM
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Car: 15 Ram, 88 IROC, 92 RS
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Re: Rack and pinion power steering

Do not remove it. That is where you set preload. If you need to flush the system, remove the return to the reservoir and refill there.
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Old Dec 8, 2023 | 02:19 AM
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Re: Rack and pinion power steering

It's important to note that the large hex plug located on the underside of the power steering rack is not meant for adjusting the rack and pinion's operation. Instead, it's designed for draining the power steering fluid. Removing this plug can cause issues with the preload setting. If you need to flush the system, you can do so by removing the return line to the reservoir and refilling from there.
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Last edited by LillianHolz; Dec 20, 2023 at 06:21 AM.
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