Subaru Coupes/Sedans/Wagons 1985-1996 Repair Guide

Evaporative Emission Canister

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The evaporative emission canister is part of a system that prevents fuel vapors contained in the fuel tank and carburetor bowl from being discharged into the air. The gas fumes are absorbed by activated charcoal located in the canister.

REMOVAL & INSTALLATION



  1. Mark or tag each hose prior to removal.
  2.  
  3. Loosen the hose clamp securing the hose to the canister.
  4.  
  5. After the clamp is loosened, slide the hose off. Continue the process until all the hose are disconnected.
  6.  
  7. Slide the evaporative canister out of the mounting bracket securing it in the engine compartment.
  8.  

To install:
  1. Slide the canister into the mounting bracket.
  2.  
  3. Slide each hose on to the respective end on the canister.
  4.  
  5. Tighten each hose clamp.
  6.  



Click image to see an enlarged view

Fig. Fig. 1: PCV valve attached to the intake manifold-fuel injected models



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Fig. Fig. 2: Disconnect the hose, then use a wrench to loosen the PCV valve at the intake manifold



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Fig. Fig. 3: Remove the PCV valve from the manifold-1991 Legacy shown



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Fig. Fig. 4: Apply Teflon® tape to the PCV valve threads before installing

  1. Start the vehicle and check for leaks.
  2.  

SERVICING



See Figure 5

Click image to see an enlarged view

Fig. Fig. 5: Hose connections for evaporative emission canister

  1. Inspect the canister for holes or damage caused by debris.
  2.  
  3. Inspect the hoses to the canister for holes, cracks or other damage.
  4.  
  5. Disconnect the vacuum hose from the canister. Blow air through the hose to ensure that air does not leak.
  6.  
  7. Disconnect the purge hose from the canister. Blow air through the hose to ensure that air does not leak.
  8.  


CAUTION
Do not suck on the hose as this will cause fuel vapors to enter your mouth.

  1. Disconnect the evaporation hose from the fuel tank side. Blow air through the hose to ensure that air flows.
  2.  
  3. Replace the canister and/or hoses if damaged.
  4.  

 
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