Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1999 Hyundai Tiburon L4-2.0LFACTORY OEM SERVICE PROCEDURE
Line Pressure Adjustment
LINE PRESSURE ADJUSTMENT
1. Drain out the automatic transaxle fluid.
2. Remove the oil pan.
3. Remove the oil filter.
4. Remove the oil-temperature sensor.
5. Press the tab of the solenoid valve harness grommet and push in.
6. Remove the valve body assembly. The manual valve can come out, so be careful not to drop it.
7. Turn the adjustment screw of the regulator valve and adjust so that the line pressure (kickdown brake pressure) reaches the standard value. When the adjustment screw is turned clockwise, the line pressure becomes lower; when it is turned counter-clockwise, it becomes higher.
Standard value: 860 - 900 kPa (122 - 129 psi, 8.77 - 9.18 kg/cm2)
Oil pressure change for each turn of adjustment screw: 38 kPa (5.4 psi, 0.39 kg/cm2)
8. Check to be sure that the O-ring is installed on the upper surface of the valve body at the place shown in the figure.
9. Replace the O-ring of the solenoid valve connector with a new one.
10. Install the valve body assembly to the case and then insert the solenoid valve connector into the case. Be sure, at this time, that the notched part of the connector faces as shown in the figure. Also be careful that the lead wiring isn't caught.
11. Tighten the ten (10) valve body assembly mounting bolts to 10 - 12 Nm (100 - 120 kg.cm, 7 - 9 ft. lbs.).
A: 25 mm (0.709 inch) long
B: 35 mm (0.984 inch) long
C: 40 mm (1.575 inch) long
12. Install the oil filter.
13. Install a new oil pan gasket with the oil pan.
14. Pour in the specified amount of Automatic transaxle fluid.
15. Make the oil pressure test. Readjust if necessary.
1. Drain out the automatic transaxle fluid.
2. Remove the oil pan.
3. Remove the oil filter.
4. Remove the oil-temperature sensor.
5. Press the tab of the solenoid valve harness grommet and push in.
6. Remove the valve body assembly. The manual valve can come out, so be careful not to drop it.
7. Turn the adjustment screw of the regulator valve and adjust so that the line pressure (kickdown brake pressure) reaches the standard value. When the adjustment screw is turned clockwise, the line pressure becomes lower; when it is turned counter-clockwise, it becomes higher.
Standard value: 860 - 900 kPa (122 - 129 psi, 8.77 - 9.18 kg/cm2)
Oil pressure change for each turn of adjustment screw: 38 kPa (5.4 psi, 0.39 kg/cm2)
8. Check to be sure that the O-ring is installed on the upper surface of the valve body at the place shown in the figure.
9. Replace the O-ring of the solenoid valve connector with a new one.
10. Install the valve body assembly to the case and then insert the solenoid valve connector into the case. Be sure, at this time, that the notched part of the connector faces as shown in the figure. Also be careful that the lead wiring isn't caught.
11. Tighten the ten (10) valve body assembly mounting bolts to 10 - 12 Nm (100 - 120 kg.cm, 7 - 9 ft. lbs.).
A: 25 mm (0.709 inch) long
B: 35 mm (0.984 inch) long
C: 40 mm (1.575 inch) long
12. Install the oil filter.
13. Install a new oil pan gasket with the oil pan.
14. Pour in the specified amount of Automatic transaxle fluid.
15. Make the oil pressure test. Readjust if necessary.
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
Comes to youSame-day available12-month warranty
Get a Free QuoteNo obligation. See pricing before you book.