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Oil/dirt In Inlet Manifold

czar02

By czar02,
in Engines & Forced Induction

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czar02 Explorer

czar02

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hi guys..

when i had the intake pipe removed and saw the dirt on the TB, i've decided that i wanted to clean it.. after removing the TB from the inlet manifold, i've also noticed oil/dirt inside the inlet manifold.. is this normal? is there a way of cleaning it?

can anyone explain this to me?.. im just a lil' worried..

i had rough idling before due to faulty coils but i've fixed that and replaced the spark plugs as well.. apart from that, the car is running fine..

tnx guys..

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AYW550 Collaborator

AYW550

Posted
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ive had this before, also noticed mine when replacing coils and plugs, i also thought it was a worry but car runs mint, i asked around here and everyone said it was common/normal, although im still not sure why or how is gets there

czar02 Explorer

czar02

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tnx guys for your inputs..

i was lookin thru n/a section last nite and there was a similar issue with a guy who's got a 34.. if that was pretty normal then im at ease to know/for now..

as for your question Eug, i didnt replaced my intake pipe but i did attached a pod filter a couple of months after i got my car..

R34 -_- Community Regular

R34 -_-

Posted
Posted

the hose running out of the top of the engine is feeding the intake oil and fumes. If you have a look at the stock air intake you would have seen a big empty box after your filter box, that was to catch the oil dripping out of the engine. If you replaced it with a straight through pipe you have now allowed it to be sucked straight into the manifold etc. Only way around it is to get an oil catch can.

czar02 Explorer

czar02

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i see.. i understand it now :) .. but wouldnt it be weird if i put an oil catch can in my n/a engine? i thought that oil catch cans are most useful for turbo/high performance cars?

is there a lot of sau members out there with an oil catch can in their n/a engine?

R34 -_- Community Regular

R34 -_-

Posted
Posted (edited)

Some racetracks/events don't allow cars to compete if they don' have one because they don't want oil on the track. Hence why only turbo/high performance cars have them coz they are the ones that usually drive on the racetracks lol..

And i'm pretty sure oil and oil fumes would lower the octane rating of the fuel or something, and also restricting airflow through the manifold and hot air (oil fumes) would surely suck the engine of Horse power :)

Edited by R34 -_-
iseekool Veteran

iseekool

Posted
Posted
the hose running out of the top of the engine is feeding the intake oil and fumes. If you have a look at the stock air intake you would have seen a big empty box after your filter box, that was to catch the oil dripping out of the engine. If you replaced it with a straight through pipe you have now allowed it to be sucked straight into the manifold etc. Only way around it is to get an oil catch can.

Just to correct you there. The empty box you are refering to is a resonator which muffles intake noise as well as adds power to an n/a setup (I know it may seem wierd) - but it has nothing to do with catching oil.

Some n/a guys on this forum have used oil catch cans - but the advantages are quite small for a stock n/a. I was contemplating this idea but its not worth the cost unless you are really driving hard (on the track of course) or if you have a turbo setup.

czar02 Explorer

czar02

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:P for that info R34 -_- .. i'll look into that.. i might invest on one l8r down the road.. just currently replacing my rocker gasket and cleaning my aac valve (i think).. also cleaning the TB..

thank u again :)

R34 -_- Community Regular

R34 -_-

Posted
Posted

no it doesn't i already answered the question before, it comes out of the one way valve sitting on the top of the engine, there's a black hose coming out of that valve that joins into your air intake pipe, the oil comes out of the valve and into the pipe, due to air flow it is sucked through the intake and into the combustion chamber where it is burnt and turned into exhaust gas.

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