In the event you are informed of irregular symptoms on your automobile, you are right to be intrigued, because a car represents a massive annual budget and unforeseen malfunctions don’t reduce the bill. So what if you think that you have a leaking injector on your Chevrolet HHR? You most likely figured it out thanks to black/oily drips along your engine unit, or a disturbed idle, or unusual black smoke. These three manifestations are the main indicators of a leaking injector. As this troubles can bring about more critical engine concerns on your car, we chose to prepare this content to help you validate the failure of a leaking injector and treat it properly. To accomplish this, we will initially look into the case of gasoline injectors and then at those of diesel injectors Chevrolet HHR.

leaking-injector-chevrolet-hhr

Leaking injector on my petrol Chevrolet HHR

It is important to know that the injectors on petrol and diesel engines are distinct, actually, the difference in combustion between these two sort of engines makes the injection distinct. The main difference lies in the pressure undergone by the injectors, on a petrol engine it will vary between 3.5 bars for indirect injection and 120 bars for indirect injection.

Leaking injector on a petrol Chevrolet HHR: The different leaks

It should be known that injector leaks on a Chevrolet HHR equipped with a petrol engine are rather infrequent. This is due to the much lower pressure in the petrol intake systems. However, there are two sort of leaks:

  • Leakage from the top of the injector:
    It is possible that you have a leak from the top of the injector, this is the portion that is connected to the fuel rail, an O-ring will be involved in this.
  • Leak injector of the lower part:
    At last, you may suffer a leak coming from the lower part of the injector of your car, this one will come from the junction with the engine and not with the rail as seen previously.

Leaking injector on my diesel Chevrolet HHR

Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion procedure produces very high pressure in the engine, as do the injectors. On these models, the pressure is more than 10 times higher than on the direct injection of car petrol engines, reaching 1800 to 2000 bars.

Leaking injector on diesel Chevrolet HHR: The different leaks

In the case of leaking diesel injectors on your Chevrolet HHR, there are three different sort of leaks:

  • Leakage from the injector inlet:
    In this case, it is an inlet pipe that will deform after a while, commonly the leak will be at the clamping point.
  • Injector return leakage:
    As its name reveals, this leakage relates to the management of the fuel return in the injector, this time the injector that leaks on your Chevrolet HHR will be the result of an O-ring or its plastic tip that leaks.
  • Injector base leak:
    This injection leak is one of the most troublesome, it is the junction between the engine and the injector nose that leaks at a copper seal, you should find an air noise and a compression loss.
  • If after verifying you have oil leaking but it does not come from your injectors, we advise you to consult this content on the existence of oil leaking on your Chevrolet HHR.

Leaking injector on my Chevrolet HHR, how to fix the leak

And at last, we’re going to look into how to fix a leaking injector on your car. Oftentimes a leak is connected, as we have seen prior to this, to a worn seal as a result of the pressures endured. But think that the pressure in the circuit is monumental, especially on diesel engines. So you will have to take some measures:

  • Lower the pressure before any work is done…
  • Covering you to avoid the risk of fuel spillage
  • NEVER work on a running diesel engine injector.

Relating to the repair part of your leak, it will oftentimes be limited to changing the seals that have failed:

  • Find out the source of the leak
  • Take apart the injector in question
  • Replace the corresponding seal kit
  • Reassemble the assembly and tighten with a torque wrench in respect with the manufacturer’s standards.

In all cases, these interventions are not automatically complicated, but if you have the smallest uncertainty in the treatment of your injector that leaks on your Chevrolet HHR, we advise you to get closer to your motor mechanic to avoid any bad manipulation that could severely harm the condition of your Chevrolet HHR.

If perhaps you have any further questions about the Chevrolet HHR, do not hesitate to consult our Chevrolet HHR category.