Oil Flow / Sump

Oil backflow prevention kit, engine side. 

Fits                                                                                                                                                                                                                                                                                        Porsche 993 Carrera 2 / 4                                                                                                                                                                                                                                      Porsche 993 S / C4S                                                                                                                                                                                                                                               Porsche 993 turbo                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               This oil backflow kit incorporates a check valve between the oil tank and the engine which prevents the smoking on start up for naturally aspirated and turbocharged 993 models.

Perhaps you have installed a pressure side oil backflow kit on your turbo model but are still experiencing smoking on start up. The issue may be on the suction side. The problem on the suction side is due to the oil tank sitting higher than the engine oil pump. Gravity creates a positive pressure on the pump and slowly fills the engine case with time. The case fills up and eventually pushes oil into the catch tanks on the hot side / turbine side of the turbo charger. Once the car is started, the cars smokes very heavily which is often misdiagnosed as a defective turbocharger.

Sold individually. 1 necessary per car.

Recommendation: This kit is all that is necessary for naturally aspirated models. 

It is best to address both the suction and pressure side to prevent the issue entirely on turbo charged models. We also sell a pressure side backflow kit under part # 993113320

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

993113320

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Oil backflow prevention kit, turbocharger side. 

Fits                                                                                                                                                                                                                                                                                        Porsche 993 turbo   

Are you experiencing smoking on start up after your turbo sits for extended periods of time? Odds are you are experiencing what is commonly referred to as oil back flow.

The problem arises from the use of low viscosity oil and the upgraded oil filter cut off mechanism not working as it should. So, you get a slow stream of engine oil which leads to overflow of the oil catch tanks on the turbochargers (pressure side).

If your leaking is due to this reason, our FVD pressure side oil backflow kit incorporates check valves that will prevent the oil from overflowing in the catch tanks and will ultimately stop the smoking on start up.

Kit Includes:                                                                                                                                                                                                                                                                      Oil Lines, Check Valves, Adapters, Washers, and hardware

Sold as a kit. 1 necessary per car.