1999 Volvo Penta "WT" Models Workshop Manual, Page 238Get this manual
Intake Manifold Service _ Upper Intake Manifold Disassembly
Remove or Disconnect:
1Throttle body nuts
rn 2Throttle body3Throttle body gasket and studs
lower Intake Manifold Disassembly
Remove or Disconnect:
rn 1MAP Sensor nut, retainer and the MAP Sensor2Fuel rail bolts and stud[] 3Fuel rail4Coolant housing bolts, coolant housing, and thermostat from lower intake manifold5Coolant Temperature Sensor from the lower intake manifoldClean and Inspect: