Nissan 300ZX Parts

Nissan 300ZX Parts Questions & Answers

• Rear Axle Shaft
  38162-02P00
  Q: What are the differences in the types of constant velocity (CV) joints used in the drive axle shafts of Turbo and Non-Turbo models on Nissan 300ZX?

  A: The differential transmits the power to the rear wheels by way of two axle shafts that rotate by means of two universal joints. There are two kinds of constant velocity (CV) joints used, depending if the subject vehicle is a Turbo model or not. Turbo models' st owning is done with Double offset-Birfield type that comes with caged ball bearings between inner race and the cage covered by a slide joint housing with a plug accompanied by a rubber boot. Non-Turbo models use what is referred to as the "Tripod-Tripod" type of bearing; this includes needle bearings enclosed within a spider assembly that is splined on the shaft and is housed in a slide joint. This bearing is locked with the spring and end cap mask, while the end of the shaft is covered with rubber boot containing lubricants.
• Booster ASY Brake
  47210-06P00
  Q: How to test the functionality of a Brake Booster on Nissan 300ZX?

  A: A vacuum servo unit together with a vacuum hose is considered to be an essential part of the brake hydraulic circuit with the help of vacuum generated from the intake manifold. The communication is made to the hydraulic master cylinder through the servo unit, through which the piston rod of the servo unit will act as the pushrod of the master cylinder. The design of the controls makes sure that the assistance is offered in all cases; and in releasing the brake pedal, vacuum is created in the rear chamber while all airflow passes through a small air cleaner. Ordinarily, the vacuum servo unit does not seize up and thereby require replacement unless the mileage to a car is very high. After engaging the vacuum servo unit, to check whether the unit functions properly, apply the brake pedal severally while seeing to it that the car moves the same distance as it did the first time. Specifically, when the engine is started with the pedal fully pushed down, the described pedal should have a slight downward movement. Pressing the brake pedal and shutting the engine off must see the brake pedal stay in the pressed position for about half a minute unchanged.
• Piston W/Pin
  12010-03P02
  Q: How to properly install piston rings and assess piston condition during maintenance on Nissan 300ZX?

  A: Using a piston ring installation tool, carefully remove the rings from the pistons without nicking or gouging them. Scrape all traces of carbon from the crown of the piston using a hand-held wire brush or fine emery cloth after the majority of deposits have been removed. Avoid using a wire brush mounted in a drill motor, as it can erode the soft piston material. Utilize a piston ring groove cleaning tool to eliminate carbon deposits from the ring grooves; if unavailable, a piece broken off the old ring can suffice, ensuring no metal is removed and the sides of the grooves remain undamaged. After cleaning, use solvent to clean the piston/rod assemblies and dry them thoroughly. If the pistons show no excessive damage or wear and the engine block isn't rebored, new pistons may not be necessary, as normal wear appears as even vertical lines and slight looseness of the top ring. Inspect each piston for cracks around the skirt, pin bosses, and ring lands, and look for scoring, scuffing, holes, or burned areas on the piston crown, which may indicate overheating, abnormal combustion, preignition, or detonation. Corrosion evidenced by pitting suggests coolant leakage into the combustion chamber or crankcase, necessitating correction of the underlying issue. Measure the piston ring side clearance by placing a new piston ring in each groove and using a feeler gauge to check the gap, ensuring to compare readings with specified clearances; excessive clearance indicates the need for new pistons. For piston-to-bore clearance, measure the cylinder bore and piston diameters, subtracting the piston diameter from the bore diameter to compute clearance, and compare with specifications; if greater, rebore the block and install new oversize pistons and rings. Assess piston-to-rod clearance by twisting the piston and rod in opposite directions; noticeable play suggests excessive wear, necessitating replacement of the assemblies. Finally, check connecting rods for cracks and damage by temporarily removing rod caps, inspecting bearing surfaces for nicks or scratches, and after checking, replace old bearings and secure the caps.
• Automatic Transmission
  31020-X8006
  Q: How to properly change the transmission oil on the Transmission Assembly of a Nissan 300ZX?

  A: Drive the vehicle for 15 minutes in stop-and-go traffic to warm the oil in the case, then raise it and secure it on four jackstands. Position a drain pan with at least a 5-pint capacity, along with rags and newspapers, under the car, and use a 1/2-inch drive ratchet wrench with an extension to remove the drain plug located on the underside of the transmission case. If the plug is not too hot, it can often be unscrewed by hand after a few turns; otherwise, use the wrench and let the plug drop into the pan for retrieval once the oil cools. Allow ample time for the oil to drain, and if a magnetic drain plug is present, inspect for metal bits that may indicate excessive wear on gear components. If no magnetic plug is available, check the bottom of the drain pan for any metal debris after the oil has cooled. Once all lubricant has drained, clean the drain plug and reinstall it, tightening to the specified torque. Remove the oil inspection/fill plug on the left side of the transmission and fill it with the appropriate amount and grade of lubricant using a hand pump or syringe until the level reaches the bottom edge of the inspection plug hole. Replace and tighten the filler plug to the specified torque, then remove the jackstands and lower the vehicle. After driving, check the drain and filler plugs for any signs of leakage.