Whenever you are informed of irregular symptoms on your automobile, you are right to be concerned, because a car represents a massive annual budget and surprising breakdowns don’t lower the costs. So what if you sense that you have a leaking injector on your Volkswagen Transporter 4? You likely figured it out thanks to black/oily drips along your engine, or a disturbed idle, or uncommon black smoke. These three symptoms are the main symptoms of a leaking injector. As this troubles can bring on more significant engine trouble on your car, we made a decision to write this content to help you verify the failure of a leaking injector and deal with it correctly. To do so, we will first of all check out the case of gasoline injectors and then at those of diesel injectors Volkswagen Transporter 4.
Leaking injector on my petrol Volkswagen Transporter 4
It is fundamental to know that the injectors on petrol and diesel engines are distinct, the reality is, the difference in combustion between these two sort of engines makes the injection distinct. The biggest difference lies in the pressure experienced 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 Volkswagen Transporter 4: The different leaks
It should be said that injector leaks on a Volkswagen Transporter 4 equipped with a petrol engine are rather rare. This is caused by the much lower pressure in the petrol intake systems. Nevertheless, there are two sort of leaks:
- Leakage from the top of the injector:
It is plausible that you have a leak from the top of the injector, this is the part that is linked to the fuel rail, an O-ring will be involved in this. - Leak injector of the lower part:
At last, you may experience 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 sooner.
Leaking injector on my diesel Volkswagen Transporter 4
Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion system 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 Volkswagen Transporter 4: The different leaks
In the case of leaking diesel injectors on your Volkswagen Transporter 4, there are three several sort of leaks:
- Leakage from the injector inlet:
In cases like this, 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 Volkswagen Transporter 4 will be caused by an O-ring or its plastic tip that leaks. - Injector base leak:
This injection leak is one of the most annoying, 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 checking you have oil leaking but it does not come from your injectors, we encourage you to browse this content on the presence of oil leaking on your Volkswagen Transporter 4.
Leaking injector on my Volkswagen Transporter 4, how to fix the leak
And at last, we’re going to check out how to fix a leaking injector on your car. Regularly a leak is linked, as we have seen prior to this, to a worn seal as a result of the pressures suffered. But think that the pressure in the circuit is gigantic, specifically on diesel engines. So you will have to take some safety measures:
- Lower the pressure before any work is carried out…
- Covering you to avoid the risk of fuel spillage
- NEVER work on a running diesel engine injector.
Concerning the repair part of your leak, it will frequently be restricted to swapping the seals that have failed:
- Locate the source of the leak
- Dismantle the injector in question
- Change 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 complex, but if you have the tiniest hesitation in the treatment of your injector that leaks on your Volkswagen Transporter 4, we encourage you to get closer to your motor mechanic to avoid any bad manipulation that could significantly harm the condition of your Volkswagen Transporter 4.
If you wish more guides on the Volkswagen Transporter 4, go to our Volkswagen Transporter 4 category.
