PCV Breather System Kit - 1994 Volvo 850 Turbo

Properly servicing the flame trap / crank case ventilation system generally means replacing all the system components and can be fairly costly as labor as the intake manifold must be removed. Generally speaking the flame trap system components need to be replaced about every 100K or so depending on the quality of oil used, oil change intervals and driving conditions. The plastic tubing and fittings get extremely brittle with age and also becomes restricted internally due to oil deposits and sludge forming inside the tubing. The restricted breather flow results in excessive crank case pressure, which in turn begins to force oil past seals. If left unchecked, seal failure can occur which in extreme cases could result in rapid loss of oil pressure and catastrophic engine failure.

Additional Keywords: CRANK CASE CRANKCASE FLAME TRAP

Product Fitment Notes & Potential Issues

The turbo inlet tube used on P80 turbo models was revised by Volvo at some point, and this kit includes the latest version of PCV hose that connects to this later style of turbo inlet tube. If your car still has an original turbo inlet tube, the kit includes a smaller elbow that can be swapped in place of the later style of elbow, circled below:

This kit fits 1994 850 Turbo models up to and including engine serial number 330413. Later models had a larger oil separator box.