Oil Coolers / EGR Valves

Call us for expert advice and a quotation for your engine machining requirements.

Pressure Testing 

Our Universal Delta pressure testing rig is versatile enough to also be able to test oil coolers an EGR valves.

Faulty oil coolers can be responsible for oil / water cross contamination when an engine is in service while faulty EGR valves can leak coolant into the engine itself.  Both issues may be confused with the symptoms of a faulty head gasket so before going to the expense of removing the cylinder head it is worth checking these items and eliminating them first.

Using specially designed connecters and hoses, many of which we have made or adapted in our own workshop, the cooler or EGR valve water inlet is connected directly to the air supply from the pressure gauge mounted on the rig.  The water outlet from the cooler or EGR valve is blocked off again using specially made hose adaptors and plugs.

Once sealed, the tap from the pressure gauge is opened which pressurises the item on test internally.  Once full testing pressure is reached, the tap is then closed and the gauge monitored for any drop in pressure.  Any loss of pressure indicates a leak which can be further confirmed by submersing the item in water.

Any escaping pressure will show up as a series of bubbles escaping from within the component.  This will confirm that the cooler or EGR valve has an internal fault which is allowing the pressurised air filling the water side of the part to pass into the unpressurised oil or exhaust side or the part.

Oil coolers or EGR valves found to be faulty should always be replaced.

Call us for expert advice and a quotation for your engine machining requirements.