When to leave vehicle filters to the professionals
It’s often tempting to turn to DIY when it comes to vehicle maintenance, especially if it’s something like a filter that needs replacing. But is this the wisest move?
Dylan Petzer, National Vice Chairman of the Tyre, Equipment and Parts Association (TEPA), a proud association of the Retail Motor Industry Organisation (RMI), says vehicle filters are not rocket science to replace but some are trickier (or messier) than others and here you’ll need to involve an accredited workshop technician.
An air filter, for example, is a DIY delight. It’s one of the easiest tasks and takes a few minutes – simply unclip a few fasteners or unscrew a few screws on the air filter housing. The cabin air filter can be a bit fiddly with the awkward clips and tight spaces but it’s definitely something the average motorist can manage.
“On the other hand, an oil filter change can take up to an hour as it includes draining, filter replacement and refilling. A fuel filter change is definitely a workshop job, as it can take several hours and involves the removal of seats and the fuel tank.
“Many modern cars have their fuel filters integrated into the fuel pump assembly inside the fuel tank. This is a job that requires specialised knowledge, tools and a respect for flammable liquids and pressurised fuel systems.
“Unless you are genuinely experienced with fuel system work, this should absolutely be left to a professional. Fuel leaks and fires are not a DIY project!”
Here are some common mistakes people make when installing new filters:
- Air filter: Forgetting directional arrows (some filters have airflow arrows. Install it the wrong way, and it won’t filter effectively).
- Oil filter: Forgetting the old gasket (leaving the old gasket stuck to the engine block leads to a double gasket, which guarantees a massive oil leak).
- Fuel filter: Not depressurising the system (the most dangerous mistake, leading to fuel spray).
Petzer also warns that installing the wrong filter or fitting the filter incorrectly can lead to a catastrophic repair.
“Fitting the wrong filter can lead to a range of problems, like unfiltered air entering the engine and inadequate filtration to incorrect sealing and severe hazards like leakage – particularly serious if it’s a fuel filter.
“Always double-check the part number for your specific vehicle! When in doubt, compare the new filter physically with the old one in terms of size, shape, gasket location inlet/outlet sizes.”
Apart from having the right tools on hand for changing a filter, there are other precautions to bear in mind, especially when it comes to an oil or fuel filter – which is why TEPA recommends these types of filter changes are left to the professionals.
“When changing a fuel filter, it is critical to depressurise the fuel system first and this often involves removing the fuel pump fuse. There’s also a fire hazard involved, so you can’t work near open flames and must have a fire extinguisher on hand. Be aware too that pressurised fuel can spray, so it’s important to protect your eyes.”
Once any filter has been replaced, start the engine or drive a short distance then check for any leaks, unusual sounds or vibrations that weren’t there before.
Petzer concludes, “For many car owners, the dealership’s branded parts are the default choice. However, savvy consumers know that premium aftermarket alternatives of matching quality, engineered by specialists, offer a compelling blend of performance and value. Do your homework and if unsure you can always consult a TEPA specialist.”
