2007 PT CruiserRack & pinion steering became the traditional steering design more than 25 year ago, replacing the recirculating ball design. The rack & pinion design is much more precise in function and an ext compact in size. Most designs use hydraulic fluid to operate the steering gear, yet in current years, the usage of an electric motor has replaced the fluid. The ease of servicing components and the whole assembly varies from automobile to vehicle, depending greatly on access due come the details vehicle design.

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Fundamentals the Rack & Pinion SteeringThe operating principle of a rack & pinion steering gear, mechanically, is quite simple. As soon as the driver turns the steering wheel, the rotational movement is converted into linear (side-to-side) activity through the meshing of the helical pinion equipment on the steering pillar with the rack this on the steering gear. The lateral activity pushes and pulls the external tie rod ends to change the direction that the front wheels to command the vehicle.

Hydraulic power assist is listed by pressurized fluid that moves the rack gear side to side. This is the an outcome of the liquid being sail to either next of a piston mounted on the rack gear. Push diverted to the right side that the rack gear piston move the rack gear to the left, steering the vehicle to the right. Push diverted come the left side of the rack gear piston moves the rack equipment to the right, steering the vehicle to the left. The flow of the pressurized fluid is regulated by a spool valve ~ above the input shaft. The mechanical activity of the pinion gear provides very tiny effort in steering the vehicle, but permits it to be steered if power help is lost.

On numerous late model vehicles, consisting of the dodge Dart, Chrysler 200, Chrysler 300 and also Dodge Challenger/Charger, electrical power steering (EPS) is available. V this design, an electric motor is utilized to relocate the rack gear side to next to command the vehicle. This is a streamlined power assist design as the hydraulic pump, pressurized fluid and hydraulic lines and also hoses have actually been eliminated. Just like the hydraulic design, mechanically steering is available if the power help is lost.

2007 PT Cruiser

The 2007 PT Cruiser is the subject vehicle for this article and it to be only accessible with hydraulic strength assist. The strength steering system is composed of the complying with components:

✔ strength steering pump

✔ power steering rack & pinion gear

✔ strength steering liquid reservoir

✔ power steering fluid pressure/return hoses

✔ power steering liquid cooler

The significant components of the power rack & pinion steering gear are the outer tie pole ends, inner tie rod ends and protective boots. Every one of these contents are serviceable.

Diagnosing power Steering ProblemsProblems v the power help on a rack & pinion steering equipment are usually quickly noticeable by the driver. Generally, it is an increase in initiative needed to steer the car. There are several reasons why it becomes difficult, the most typical being an exterior steering liquid leak, or an internal steering fluid leak. In both cases, there is a to decrease in the amount of fluid easily accessible for strength assist.

An external leak is simple to notice as the fluid will be viewed on the ground under the vehicle. An internal leak is a little bit trickier come find. The network effect, though, is the same. An outside leak deserve to usually it is in traced come a damaged liquid line or bad hose connector. These difficulties are easily fixed. If an internal leak is suspected, hydraulic flow and pressure test need to be performed.

The hydraulic flow and pressure test will certainly verify the power of the power steering pump and also determine if the steering equipment is leaking internally. Let’s assume the power steering pump is good. Making use of the strength steering analyzer circulation meter, fully open the valve. Turn the steering wheel come the too much left till the equipment hits the stop. Document the pressure. Turn the steering wheel come the excessive right till the gear hits the stop. Record the pressure. Compare the readings come the specs. If the highest output pressure reading against one protect against is not within 50 psi the the highest possible reading at the various other stop, the steering equipment is leaking internally. The steering equipment must be replaced.

If the steering equipment is loud (objectionable hiss or horn sound), this could be one indication that a poor steering gear. Come verify this problem, a an easy test deserve to be performed. Examine and change the power steering fluid, as necessary. Begin the vehicle and also heat the steering device by rotating the steering wheel lock to lock five times through the engine running at 3000 rpm (don’t host the steering gear versus the stops for more than 15 seconds at a time). Facility the steering wheel and also return the engine speed to idle. Progressively turn the wheel off facility during a dry park maneuver while listening for the noise. If the hissing or whistling sound is present, the steering equipment is bad and must it is in replaced.

Replacing the Rack & Pinion Steering GearReplacing the steering equipment can be a time consuming job on the PT Cruiser due to space constraints top top this front-wheel drive car. Let’s review this procedure in a step-by-step fashion.

1. ›› Lock the steering wheel in the straight ahead position; this keeps the clockspring in the ideal orientation.2. ›› at the basic of the steering column, eliminate the pinch bolt and separate steering shaft coupling.

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3. ›› raise the vehicle, secure it on jackstands and also remove both prior wheels.4. ›› On each side the the vehicle, separate the external tie rod end from the steering knuckle (Figure 1).5. ›› Disconnect the wiring exploit connector because that the strength steering liquid pressure switch.6. ›› top top nonturbo cars, eliminate the push hose in ~ the steering gear, then remove the cooler hose at the steering equipment outlet port fitting.7. ›› on turbocars, eliminate the press hose at the steering gear, then remove the return hose at the steering gear outlet port fitting.8. ›› remove the two screws the secure the cooler come the suspension crossmember; enable the cooler come hang out of the way.9. ›› eliminate the pencil strut from the right corner of the crossmember and body.10. ›› eliminate one fastener the secures the wheel house splash shield come the journey belt splash shield, then remove the fastener that secures the drive belt splash shield to the former crossmember.Note: It can be crucial to eliminate some the the fasteners that secure the prior fascia to the body lower reinforcement in stimulate to access the drive belt splash shield forward fastener.
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11. ›› remove the drive belt splash shield.12. ›› remove the bolt the mounts the engine talk strut to the crossmember.13. ›› note the place of the former crossmember ~ above the body; this is critical to keep the preset camber and also caster setups (Figure 2).14. ›› reduced the front crossmember utilizing a infection jack to accessibility the reduced steering shaft coupling.Note: reduced the steering equipment slowly, being cautious not to overextend or damage the fluid hoses.15. ›› different the reduced coupling indigenous the steering gear input shaft, then eliminate the pinion tower dash cover seal.16. ›› eliminate the steering gear from the former crossmember (Figure 3).

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To download the brand-new steering gear, monitor the removal measures in the turning back order. Be sure to appropriately align the crossmember through the scribed note as provided in step 13.