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.
1987 Saab 900 SPGFACTORY OEM SERVICE PROCEDURE
Two-Port & On-Off EGR System
- Operate engine at normal operating temperature. Connect a tachometer to engine. Slowly raise engine speed. Note engine RPM at which valve begins to open. The valve spindle is visible between valve casting and valve bellows.
- Opening RPM should be within specification. See EGR VALVE SPECIFICATIONS table. Check EGR valve and thermostatic valve if RPM is not within specification.
EGR VALVE SPECIFICATIONS
| Application | Engine RPM |
|---|---|
| On-Off | 1900 |
| Two-Port | 2300-2900 |
Factory Service Tools
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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.
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