The particle filter is a pretty recent technology that aims to take out harmful particles from the exhaust gases of modern diesels. It has long been discovered as the miracle solution to these pollution problems. However, it doesn’t work as well as intended and causes more problems than it resolves, which is why we will see on this page when changing the particulate filter of a Subaru Legacy? . To achieve this, to begin with, we will find out what the particle filter on your car is used for, and then when to replace the particle filter on your Subaru Legacy.
What’s the point of a Subaru Legacy’s particulate filter?
So we start our content with the explanation for this element not too long ago included into diesel automobiles. As we described quickly in the introduction, the intent of this filter was to fix the problems of pollution and harmfulness of exhaust gases from Subaru Legacy automobiles. Its functioning concept is to store exhaust gases that are unburned or that still contain harmful particles, and when it is at a adequately high temperature to trigger a second combustion that will finish burning and get rid of all these carcinogenic particles. Sadly, to reach this very high engine unit temperature, you have to be on the highway or have your Subaru Legacy engine unit revving up. So we have noticed over time that vehicles that are specifically on short trips or in the city do not enable the particulate filter to burn these gases and we will observe in the next part that these problems can force you to replace the particulate filter of your Subaru Legacy .
When to replace the particulate filter of a Subaru Legacy?
In this section we will find out what you are certainly drawn to here, whether it is necessary to replace the particulate filter of a Subaru Legacy and if so, when?
Is it necessary to replace the particulate filter on Subaru Legacy?
There are 2 sort of particulate filter for vehicles, a particulate filter with additive, which does not matter the Subaru Legacy, but which needs to be recharged every 120, 000km with an additive that enables the regeneration of the particulate filter and consequently to burn all those harmful soot. The second one, the one we are keen on in this article, works with precious metals that will create a chemical reaction at high temperature and trigger the regeneration of the filter and the evacuation of the carcinogenic materials. However, as explained above, it needs very high temperatures, if these are not reached the filter will clog. If the filter is not regenerated manually, drive at high speed for about 20 minutes to reach this temperature and thus regenerate your filter, you will clog it and risk damaging your turbo, your EGR valve or your engine unit. If you need to clean the EGR valve of your Subaru Legacy because of your particulate filter, do not think twice to check out our article on this subject to find out what the procedure is.
When to replace the particulate filter of a Subaru Legacy?
As we explained just before, a particulate filter is designed to last the life of the car, however some of you may wonder when it is necessary to replace the particulate filter of its Subaru Legacy? Take note that this component is extremely expensive, labor is not the most important issue because it is easy to access. But the part itself will vary enormously in price based on your motorization, you can still count a range between 700 and 2000€. This replace should only be considered in the case of a completely clogged particle filter. If you don’t repeatedly take the motorway, we recommend you, every month to drive 10 minutes on the motorway at least 3000 rpm . In spite of everything, the current particulate filter have not been well designed and remain problematic, it is considered that because of the lack of a sufficiently regular temperature rise and other design problems, you should start planning to replace your particulate filter from 200, 000km if you have a use of your XX that is more urban and a little more if it is mixed .
Whenever you have any additional questions about the Subaru Legacy, do not hesitate to consult our Subaru Legacy category.
