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.
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HOMESERVICE MANUALSPONTIAC1987BONNEVILLE SEREPAIR AND DIAGNOSIS (SINGLE PAGE)GENERAL INFORMATIONMAP - EXHAUST SYSTEMSEXHAUST SYSTEMSHEAT RISERS (MECHANICAL EFE DEVICES)
1987 Pontiac Bonneville SE
Heat Risers (Mechanical EFE Devices)
1987 Pontiac Bonneville SESECTION Heat Risers (Mechanical EFE Devices)
| Condition | Code | Procedure |
|---|---|---|
| Broken | A | Require replacement of affected parts |
| Diaphragm Inoperative | A | Require replacement |
|
NOTE:
If the inoperative diaphragm is separate from the heat riser, then require replacement of the inoperative diaphragm. If the inoperative diaphragm is part of the heat riser, then replace the heatriser
|
||
| Leaking | B | Require repair or replacement |
| Noisy | 2 | Suggest repair or replacement of affected parts |
| Seized | A | Require repair or replacement of affected parts |
| Spring broken | B | Require replacement of spring(s) |
| Spring Inoperative | A | Require replacement of spring(s) |
RENDER: 1.0x
NO RELATED
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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.