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Volvo Maintenance Hints for 7xx/9xx - Bill Garland's Nuclear ...

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Engine: Diesel FAQ Home<br />

<strong>Volvo</strong> <strong>Maintenance</strong> FAQ <strong>for</strong> <strong>7xx</strong>/<strong>9xx</strong>/90<br />

Cars Version 7.5<br />

Purchasing Used Diesel<br />

Diesel Lubricants and Oil Fill<br />

Diesel In<strong>for</strong>mation Tips and FAQ<br />

Diesel Fuel<br />

Diesel Fuel Filter<br />

Timing Belt<br />

Water Pump<br />

Valve Adjustments and Injectors<br />

Faulty Starting: Troubleshooting<br />

Excessive Smoking<br />

Replacing Cold Start Device<br />

Injector Rebuild<br />

Diesel Compression Test<br />

Turbo Diesel Vacuum Pump Noise<br />

Turbo Diesel Cylinder Head Removal and<br />

Recondition<br />

Injection Pump Seal Replacement<br />

Oil Pump Gasket Replacement<br />

Starter<br />

Diesel Parts<br />

Purchasing Used Diesel. [Advice: Steve MacSween] A diesel with a blown head gasket is a<br />

large, difficult-to-move paperweight. You cannot negotiate on purchasing a diesel without a<br />

thorough inspection by a qualified diesel mechanic. In most areas of North America (except<br />

possibly the midwest US) as a general rule that means NOT a <strong>Volvo</strong> mechanic, from what I<br />

have heard. They simply don't know enough about diesels. Go to a VW diesel specialist, or find<br />

a heavy truck shop willing to work on diesel cars.<br />

A thorough inspection must include at minimum a compression test, and that is a bare minimum.<br />

You should ideally have a cylinder leakdown test (CLT) done as well. Diesels run at around 20:1<br />

compression -- compression loss means they become difficult or impossible to start in cold<br />

weather. A compression test or CLT is pointless, with the head gasket blown. If the head<br />

gasket is blown, there is an excellent chance the head is warped and will need to be machined<br />

be<strong>for</strong>e the new gasket is installed.

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