Common Damage Signs Involving Your Saab 9-3 Oil Filler Cap
Located right at the top of your engine block and valve cover is your oil filler cap. It functions as a lid to the oil filler neck where motor oil is poured into. Without this lid, the motor oil on your engine block is vulnerable to different contaminants such as dust and slivers of metal from the engine. Your oil filler cap is known to have some issues which cause different symptoms that are hard to ignore. Following are some of these:
Stuck Saab 9-3 oil filler cap
There is nothing more frustrating than having to add oil to your engine block but your oil filler cap is stuck to the valve cover. Usually, the cap needs to be twisted at least 180 degrees to be detached from the filler neck. When you experience being stuck midway, you are having a problem with the O-ring located at the underside of your oil filler cap. Over time, this ring swells, making it difficult to remove the cap. In this case, you need to exert as much effort as you can in order to remove the cap. After doing so, it is required to replace your oil filler cap to avoid such problem again.
Loose Saab 9-3 oil filler cap
A loose oil filler cap can be a problem because it exposes your motor oil to contaminants from the engine bay. More so, it would come to a point where it can be completely removed from the valve cover while you are driving. The cap can move around the engine bay and cause damage to different crucial parts. This issue is the exact opposite of a swollen O-ring. In this case, the ring has deteriorated and come loose. As an effect, the cap does not lock well with the oil filler neck anymore.
Smoke coming from your oil filler cap can be a symptom of a lot of problems with your engine. Simply put, the smoke is produced by the compression pressure in the engine that overwhelms the PCV system. The compression pressure is usually a result of worn engine pistons or a blown header gasket. With this, have your engine checked by a professional. There may be more problems with your engine as shown by the smoke coming from the cap.