Cooling System - Underhood Gurgling Noises
NO: 25-24DATE: 04-25-2006
MODEL/ YEAR: S80 2003
XC90 2003
SUBJECT Gurgling or Groaning Noise from the Hose under the Intake Manifold
REFERENCE: VIDA SB 25-0038
DESCRIPTION:
A gurgling or groaning type of sound from the front of the engine could be caused by the hose under the intake manifold or the hollow screw that attaches the banjo fitting to the manifold. To prevent having to replace the entire hose assembly, a new hose kit is available as a replacement part. There is also an improved hollow screw. This TNN describes how to replace the hose.
SERVICE:
Replace the hose and hollow screw under the intake manifold to correct the noise concern.
Information:
The illustration displays the new replacement part with hollow screw and copper washers.
Removing the intake manifold
Intake manifold removal, see VIDA: Repairing
and installing - function group 25 - Intake
manifold/-gasket replacing
Removing the vacuum nipple
Wet the outside of the insulation using soap
solution. Fold back both ends of the insulation.
Place paper under the vacuum nipple to absorb any coolant leakage.
Install hose clamp pliers on the engine coolant hoses.
Remove the hose clamps on the engine coolant hoses.
Disconnect the engine coolant hoses from the nipple.
Remove the hose clamp from the plastic hose
nipple on the oil trap.
Pull the plastic hose out from the insulation.
Note! If the white plastic nipple breaks off and remains in the rubber hose it must be removed. See the following step.
If the nipple breaks, it must be removed.
It must not be pushed into the hose.
Hint: Secure the hose above the clamp. Use pliers.
Carefully screw a self-tapping screw into the
nipple. The inner diameter of the nipple is 2.7 mm.
Remove the clamp.
Pull out the broken nipple.
Installing the vacuum nipple
Wet the plastic hose on the new nipple. Use a soap solution.
Push the hose through the insulation following the previous routing.
Install the hose and nipple on the oil trap. Use a new clamp.
Install the engine coolant hoses on the vacuum
nipple. Use new clamps. Remove the hose clamp pliers.
Fold the insulation back into place.
If the insulation breaks, apply tape over the crack.
Installing the intake manifold
Intake manifold installing, see VIDA: Repairing
and installing function group 25 Intake manifold/-gasket replacing
Note! Install new hollow screw.
Test drive the car.
Check the cooling system for leakage.
Check the coolant level.
WARRANTY CLAIM INFORMATION