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.
Valve Body Assembly: Notes
1991 Mazda 929 SSECTION Notes
NOTE:
Valve body contains precision components. Place the removed components in order of removal to ensure reassembly to their original locations and positions. See Fig 1
-Figure
. See ORIFICE CHECK VALVE SPECIFICATIONS
tables for size and location of orifices. See Fig 1
and Fig 2
.
ORIFICE CHECK VALVE SPECIFICATIONS (N4A-EL) (MD121) (1)
| Application | In. (mm) | ||||
|---|---|---|---|---|---|
| RX7 | |||||
| "A" | .071 (1.80) | ||||
| "B" | .087 (2.20) | ||||
| "C" | .059 (1.50) | ||||
| "D" | .047 (1.20) | ||||
| "E" | .039 (1.00) | ||||
| "F" | None | ||||
| 929 | |||||
| "A" | |||||
| DOHC Engine | .079 (2.00) | ||||
| SOHC Engine | .071 (1.80) | ||||
| "B" | .089 (2.50) | ||||
| "C" | .059 (1.50) | ||||
| "D" | |||||
| DOHC Engine | .043 (1.10) | ||||
| SOHC Engine | .039 (1.00) | ||||
| "E" | .039 (1.00) | ||||
| "F" | .087 (2.20) | ||||
|
|||||
ORIFICE CHECK VALVE SPECIFICATIONS (N4A-HL) (MD121) (1)
| Application | In. (mm) | |||
|---|---|---|---|---|
| MPV With G6 Engine | ||||
| "A" | .079 (2.00) | |||
| "B" | .059 (1.50) | |||
| "C" | .067 (1.70) | |||
| "D" | .087 (2.20) | |||
| "E" | .079 (2.00) | |||
| Miata | ||||
| "A" | .079 (2.00) | |||
| "B" | .059 (1.50) | |||
| "C" | .043 (1.10) | |||
| "D" | None | |||
| "E" | .071 (1.80) | |||
|
||||
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra 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.