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ENGINE HEALTH CHECK > Contents
ENGINE HEALTH CHECK> Contents

 

POTENTIAL ENGINE HEALTH PROBLEMS - INTRODUCTION

ACCUMULATED MILEAGE
Total mileage is not generally a very good yardstick of engine condition. More attention should be given to how the vehicle has been driven and maintained during those miles. While the air-cooled VW engine, especially Types 1-3, is not known for extreme longevity, it can last more than 100,000 miles between rebuilds. When driven inside its performance limitations and given proper servicing, a car engine should last this long.
Type 2 Bus engines and vehicles driven off-road typically last less.

The potential engine problems have been divided into two basic categories.

  • General Troubleshooting - which mainly covers relatively simple engine problems such as failing to start or poor running. These are attributed to either the engine being in a poor state of tune / adjustment or the wear / failure of a relatively simple external component.
  • Diagnostic Tests - which may help pinpoint more serious internal engine problems. These problems will usually be a result of either poor engine maintenance or the engine's accumulated mileage.
    More Info

 

 

 


GENERAL TROUBLESHOOTING
Covers common engine problems and faults. These are divided into the following categories and Symptom / Reason / Remedy

1. Common General Engine Problems
2. Engine Cooling Problems
3. Fuel System & Carburation Problems
4. Ignition System Problems

General Troubleshooting

DIAGNOSTIC TESTS
What follows are a number of ways to examine the engine for some potential internal problems without having to dismantle it.

1. Power-Balance & Compression Tests
These tests show how much each cylinder contributes to the power output of the engine.

2. Noise Diagnosis
Diagnosing engine noises can be a difficult and imprecise art. However, in many cases it can give a reasonable indication of an engine's health and help identify potential problems.

  • Isolating Normal Noises
  • External Noises
  • Internal Noises

3. Oil Consumption
A worn out engine will generally perform poorly and use a lot of oil. This is most likely to be caused by worn rings and cylinders. But it is also possible for engine performance to be low and oil consumption to be normal. In this case, the valves, camshaft, or valve springs could be at fault.

  • Reasons for an Engine to Burn Oil
  • Common Sources of Engine Oil Leaks
    Power Balance & Compression Tests
More Info
Engine Oil Consumption
Engine Noise Diagnostic Tests

 

 

 

 

 

 

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