Oil Air Seperator Modification

[macka'sxr6t]

The fuel filter that I wil be trying is from a diesel engine. Diesel by production process has a higher oil composition so I would presume that the filter would be be designed to handle this not suree of actual composition but I might buy one and cut it open to see what it's made of.

As we are only talking miniscule amounts of oil particles mixed in the air I don't see a problem unless your motor is completely stuffed. I have'nt changed my fuel filter in my 4x4 for years. Also most cars are stationary for probably 50% of the day and I think you'll find that any oil will settle in the bottom of the filter. IMO

It will be interesting to see how mick's test turn out. If it works OK it would be a cheap throw away and replace option.

It's worth experimenting with.

[TURBO4LT]

Great work EXR24T, make sure you keep us updated on how it goes.

Well I brought a ryco fuel filter tonight ($9), mine has the inlet and outlet 180deg apart.

I've also got a vacuum gauge and so I'm ready to test the change in vacuum (and crankcase pressure) when sucking it through the filter.

Frank, I agree with you about the possible build up in pressure in the crankcase as the filter fills with oil, so test number 3 will be adding some oil to the filter and measuring the change in vacuum, as opposed to a clean filter and no filter (stock).

Mick

Hi Mick

Its just that I had this problem with a previous car that was turbocharged especially under hard acceleration and it was pumping oil out turbine wheel of the turbo into the exhaust.

Frank

[Guest EXR24T]

what do you all think of this oil air seperator used on air lines as a possible catch can mod .( it has no air flow restriction at low pressure either !!) .

pic 1.

[Guest EXR24T]

pic 2.

[Guest EXR24T]

cost of oil air seperator aprox $50.00 plus GST . ( not including barb connectors ).

pic 3.

[Blown BA]

what do you all think of this oil air seperator used on air lines as a possible catch can mod .( it has no air flow restriction at low pressure either !!) .

pic 1.

That is what they use on hydrolic presses at my work, are they the same??

[Guest EXR24T]

G'day Bloan BA , I reackon so brother . we use these on our air lines at work so I say your on the money . one of my concerns with this device is wether it is able to be utilised in the engine bay due to high temp's !! I will make an inquiry with the suppliers in regards to this . will post more info when avaliable !

all the best EXR24T.

[Guest EXR24T]

G'day Blown BA , now that's a bit better, got to forgive me , me's justa simple plummer , oop's there I go again plumber !!

all the best EXR24T.

[Guest Big Mick]

Alright, I have connected a fuel filter inline with the breather tube from the rocker cover to the inlet in the crossover as per EXR24T's mod and it is now running as an experiment.

I did a number of pressure readings (with the engine at wide open throttle while driving) prior to fitting the filter and then once the filter was installed and there was no noticable difference with the filter in place.

I will retest again in a week or so as the filter will surely provide a greater restriction as it does it's job with the oil vapour.

Out of interest I reckon the filter was slightly darker in colour just from the testing I did with it.

EXR24T, I also thought about the industrial oil/air separators but dismissed them as I thought they would be too expensive and may not work well at our low vacuum levels. A lot of them are designed for compressed air at 600+kPa.

It will be interesting to see what you come up with.

Mick

[Benny]

Hey guys I know this isn't made for the T but this is a Cusco 3ltr oil catch can out of my brother inlaws GTR. Just thought you might be interested in seeing its construction. Anyone got any ideas as to why they come so big when blow by produces only small amounts of oil.