Genuine Volvo S70 Intake Manifold

Volvo S70 Intake Manifold Parts and Q&A

• Intake Manifold
  8250393
  Q: What precautions should be observed before working on the Intake Manifold in the fuel system on Volvo S70?

  A:

  Before processing any part in the fuel circuit, note the precautions. Turn off the battery with the negative lead and the air intake duct from the throttle housing and, if applicable, turbocharger inlet ducting. Remove cover over accelerator cable drum and linkage, release outer cable retaining clip and unhook inner cable. For easing the early models undo the bolts holding the fuel pipe clamps and remove them, then extract the fuel rail and injectors. Disconnect the wiring connector at the throttle housing, idle air control valve hoses and control valve wiring connector. Detach the brake servo vacuum hose, EGA hoses and any other vacuum hoses from the front of the intake manifold, together with any of the vacuum hoses connecting to outside services if any. Release wiring harness from intake manifold cable clamps, undo bolt holding dipstick tube and bolt holding intake manifold to steady bracket. Slacken the lower retaining bolts a couple of turns and all the upper bolts then lift the intake manifold upwards, feeding the ventilation hose from the crankcase through the ducts if applicable. If the intake manifold fails to lift, make sure the gasket has not stuck to the face of the intake manifold. Once you have removed the intake manifold, remove the lower bolts and gasket. If needed, remove the remaining components on the intake manifold. For engines with a variable venturi inlet system, inspect the flap valves and spindles, ensuring they operate perfectly, and contact a Volvo dealer to fix them if problems arise. To refit, reverse the removal operations using a new intake manifold gasket and new seals and O-rings for the injectors if needed. Set the intake manifold gasket to their position on the cylinder head, install the bolts of the lower intake manifold by turning a few times before installing the intake manifold, and check whether the crankcase ventilation hose is in place. Finally, tighten the bolts to the recommended torque setting and refit and adjust the accelerator cable, if applicable.