Emissions - Venting Turbo Exhaust from Shop

Subject: Exhaust Gas Extraction

Vehicles: All Turbo Cars

Date: June, 1981

Group: 25

No.: 21

This bulletin is issued by Volvo of America and is applicable to the USA and Canadian Market.

The following applies to turbo-engine cars connected to an extractor hose in the workshop:





If very powerful exhaust gas extraction system is used, there is risk that oil will be drawn into the exhaust system past the turbocharger gaskets.

This would cause the sound-damping material in the exhaust system to be soaked in oil, and cause blue exhaust smoke to be emitted from the exhaust for a long time. Such a condition could be misinterpreted as a turbo inner oil leakage and could result in unnecessary repairs.

Very powerful exhaust gas extraction systems can also lead to incorrect
results when checking/adjusting the CO level.

To avoid these potential situations use an extractor hose which does not create a sealed system.