Check out our helpful guide to diagnosing common issues, causes, and ways to make the necessary repairs.

VW Diagnostic Tip 1

The Trick to Diagnosing VW Oil Pressure ProblemsVW Oil Pressure Problems

Always start by checking the oil level. Too much oil or too little oil will cause high or low pressure. Adding oil may help low pressure temporarily but unless the level is properly maintained, the problem will return. Some small oil consumption is typical, particularly as a vehicle ages, but if adding regularly a more permanent fix should be looked at.

If the engine is leaking oil new gaskets and/or seals are the likely fix. If the engine is burning oil (usually dark exhaust or can small in exhaust) the valve guides and seals are probably worn, but the rings and cylinders may be bad as well. To determine the extent of the repair use a wet compression test and/or leak down test. It will tell you if it is valve guides or rings and cylinders that need replacing.

The fastest fix in the case of worn guides is new valve guide seals (when possible) without pulling the head. The best fix is to pull the heads and have the guides knurled and reamed for over-sized valve stems. Rings and cylinder repair will need a complete overhaul.

Diagnose common issues with VW’s you can watch for, diagnose, and even fixed if you are a decent driveway mechanic.

VW Diagnostic Tip 2

How to Identify VW Water Pump Issues

VW Water PumpThe main VW water pump is gear-or belt-driven. The pump is operated by a belt. On newer cars this is the timing belt. Older cars the pump and belt run off the main crankshaft pulley with either a “V” or flat belt.

Preventative maintenance of VW water pump is done by drive-belt replacement and tension adjustment on external type pumps. Timing-belt-driven pumps always should be replaced at the same time as scheduled timing belt and tensioner replacement.

VW Diagnostic Tip 2

The Trick to Diagnosing VW Starter Problem
VW Starter

The starter is the larger power user of any component in a VW electrical system. VW starters come in varying designs. Gear-reduction are typical in higher torque engines, permanent-magnet types are used to  reduce size and weight in some models, and ordinary old-fashioned heavy starters in most older models.

In older vehicles a slow cranking engine is the first sign of a failing starter. Obviously checking battery and connections or relays and fuses is done prior to changing starter but when the obvious is eliminated it will often be the starter.

To extend the life of your WW starter always turn off major components prior to starting your vehicle. These include things like AC compressor, blower motor and high-powered stereos. This greatly reduces the load on the starter. Some newer models have a lock out that does this for you but it is good practice if you are unsure if your car is so equipped. When a starter is replaced it is always wise to replace the entire unit as opposed to just some components like the bendix.

To save costs in repairs you can Find VW parts online for your car or at local parts stores. Typically this is more affordable than a dealership parts department.