Wednesday, May 28, 2014 at 13:55
Peter F9
Two filters in series will of course add some restriction, BUT, since the effect will be minimal and less than a clogged filter anyway it shouldn't affect the system at all because it is still within it's operating parameters.
However, if the additional filter is before the OE filter and also bigger flow rate than the OE, then the restriction effect would be even less noticeable.
Johns & Reginas filter , being 2 micron is good to have but it has to be of a flowrate/area which doesn't affect the normal flow rate. If it will block with the stuff that goes through the stated 10 micron OE filter if sufficient hits it.
All these systems have to have a flow rate to supply AND also to provide adequate cooling flows for the High Pressure pump. You can use a small filter but it won't pass the cooling flow required in addition to the usage flow.
If you ever get a restriction indication, then the cooling flow aspect has been compromised for a period of time/KM before the alarm.
With the 2 micron after the OE it is a good thing BUT, you will only get a restriction sensing if it is the OE filter blocking.
If the New filter is restricting, the first indication you will get of a restriction, is if the engine doesn't want to work
well as that position negates the OE restriction sensing the new one is blocking,
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