Difficulty

Moderate

Steps

17

Time Required

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Sections

3

  • 1985-1988 Volvo 740 Preparing Car For Work
  • 1 step
  • Removing Throttle Body
  • 12 steps
  • Cleaning 1985-1988 Volvo 740 Throttle Body
  • 4 steps

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Introduction

What you need

Step 1

              1985-1988 Volvo 740 Preparing Car For Work
  • Firstly Disconnect battery
  • Always take the negative terminal off first.
  • ‘‘‘General Tip After disconnecting the battery leave the car for about 10 mins , This lets any residual energy left in the electrical system to dissapate. It is good practise whatever the job

Firstly Disconnect battery

Always take the negative terminal off first.

‘‘‘General Tip After disconnecting the battery leave the car for about 10 mins , This lets any residual energy left in the electrical system to dissapate. It is good practise whatever the job

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Step 2

              Removing Throttle Body
  • Locate throttle body on right side of engine, it is between the intake tube and intake manifold.

Locate throttle body on right side of engine, it is between the intake tube and intake manifold.

Step 3

  • Locate throttle linkage cable assembly.

Locate throttle linkage cable assembly.

Step 4

  • Twist the assembly clockwise.

Twist the assembly clockwise.

Step 5

  • Slide both slackened cables off assembly’s guides.

Slide both slackened cables off assembly’s guides.

Step 6

  • Locate the two hoses on the top of the throttle body.
  • Gently lift the hoses off.

Locate the two hoses on the top of the throttle body.

Gently lift the hoses off.

Step 7

  • Use a flat head screwdriver to loosen the hose clamp attaching the intake tube to the throttle body.

Use a flat head screwdriver to loosen the hose clamp attaching the intake tube to the throttle body.

Step 8

  • Remove the intake tube from the throttle body.

Remove the intake tube from the throttle body.

Step 9

  • Locate wiring clip on the underside of the throttle body.

Locate wiring clip on the underside of the throttle body.

Step 10

  • Press down on the locking mechanism before gently removing the wiring clip.

Press down on the locking mechanism before gently removing the wiring clip.

Step 11

  • Locate throttle linkage arm.
  • Open the locking clip with a flat head screwdriver.
  • Pry off the linkage arm with a flat head screwdriver.

Locate throttle linkage arm.

Open the locking clip with a flat head screwdriver.

Pry off the linkage arm with a flat head screwdriver.

Step 12

  • Locate the three 13mm nuts attaching the throttle body to the intake manifold.
  • Remove nuts with a 13mm crescent wrench.

Locate the three 13mm nuts attaching the throttle body to the intake manifold.

Remove nuts with a 13mm crescent wrench.

Step 13

  • Lift the throttle body off of the intake manifold.
  • The manifold is now out of the engine bay and ready for cleaning or adjustment.

Lift the throttle body off of the intake manifold.

The manifold is now out of the engine bay and ready for cleaning or adjustment.

Step 14

              Cleaning 1985-1988 Volvo 740 Throttle Body
  • Cover the electrical contacts with a shop towel to prevent throttle body cleaner from inadvertently spilling over.

Cover the electrical contacts with a shop towel to prevent throttle body cleaner from inadvertently spilling over.

Step 15

  • Liberally apply throttle body cleaner to the inside of throttle body and butterfly valve.
  • Use a shop towel sprayed with cleaner to wipe off thick grime if severely dirtied.

Liberally apply throttle body cleaner to the inside of throttle body and butterfly valve.

Use a shop towel sprayed with cleaner to wipe off thick grime if severely dirtied.

Step 16

  • Spray electrical cleaner on the metal contacts to blast away particles in the bracket.
  • Spray off the wiring clip that attaches to the throttle body inside the engine bay.

Spray electrical cleaner on the metal contacts to blast away particles in the bracket.

Spray off the wiring clip that attaches to the throttle body inside the engine bay.

Step 17

  • Apply a small amount of dielectric grease to the metal contacts to prevent corrosion.

Apply a small amount of dielectric grease to the metal contacts to prevent corrosion.

To reinstall the throttle body after cleaning follow reverse directions for prerequisite guide #2

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                    Raymond

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                       Cal Poly, Team 3-28, Regan Fall 2010                        

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