Maintaining oil pressure is crucial in modern compact engines and parts specialist FAI has offered some important advice on best practice maintenance to ensure this. 

Lower pressure means failures occur, they cause several common issues, especially within chain-driven vehicles, as many chain tensioners rely on consistent pressure and a well-lubricated chain system. This means pump sales are on the increase. 

Diagnosis of a failing pump can be tricky as the symptoms overlap with a number of common issues, such as: 

-    Oil light on dash / Low oil pressure
-    Increased Engine Temperature
-    Noisy valve train – Especially from the Hydraulic Lifters that depend on consistent oil flow.
-    Oil pump whirring 
-    Bottom end knocking from crankshaft, pistons or small ends

When replacing a pump the installation process should also take into account some key factors. These include: 

-    Re-filling with the OE recommended grade of oil
-    Checking for subsequent damage as a result of the previous failing pump
-    Thoroughly cleaning all components (old & new) to ensure all contaminants are removed
-    Avoiding excessive use/amounts of liquid silicon gasket (RTV)
-    Checking fitment instruction carefully. 

FAI say in cases of low oil pressure, many pumps are replaced as part of the diagnostic process and with them, fresh oil and filters is best practice as with any failure that results in one of the symptoms, the oil system may have suffered from a build-up of metallic particles. 

If low pressure persists after a new pump is fitted, the underlying cause should be investigated, and in most cases, failing engine components such as crankshaft bearings will be the culprit of a change in tolerances and subsequent low pressure. If engine bearings do need replacing, the crankshaft must be checked for damage or wear, if either are found the crankshaft must be re-ground and oversize engine bearings fitted.

The FAI oil pumps range covers all major pump designs and drive types, covering over 1400 engine model variants. Pumps are designed to the latest specifications and fully factory tested. These are available from FAI stockists.