04 a4 1.8 vacuum hose fill with yellow slim stuff.


Asked by Sep 14, 2016 at 11:31 PM about the 2004 Audi A4 1.8T quattro Sedan AWD

Question type: Maintenance & Repair

Car had misfire on cylinders 2 no vacuum
leaks how ever I foun a leak between
exhaust manifold N turbo
wastgate/housing(turbo mount gasket seal)
half gone N its leaking, maybe explain my
rough idle on low rpm N misfire N will be
repair.... Has I was removing all vacuum
lines by head gasket n disconnected 3way
hose yellow slimy stuff came out N what I
did was follow all the way down n it turned
to be a breather hose connected to engine....
I took intake manifold off for more room...
Has soon as I remove lock pin the breather
hose came off(cracked right before the lock
pin) N also I discovered the reason of my
coolant lost, the coolant was leaking
through the J plug lol.... It looked like maybe
it made its way in through cracked breather
hose which explain yellow stuff in vacuum
line....anyways I removed the rest of broken
breather hose N yellow stuff is inside Im not
sure what to call it maybe breather hose
housing, its kinda connected with oil filter or
whatervre its called, does any 1 know what
the yellow stuff is?......it was also weird
yellow stuff only occur from crank case to
head gasket N all the way down to breather
hose N inside.

3 Answers


Inside oil filter adapter bracket...is this really bad or can I remove it N clean, also do I have to replace oil filter cooler?


Ok..... Found the problem ppl lol. Blown headgasket and it leaked coolant in the engine on cylinder 2 explains the crazy smoke coming out the exhaust, misfire and rough idle also found out the turbo wastegate/bracket/housing was cracked. Fix: New turbo New gasket New head valve job Flush coolant system. New coolant & 2 cool/temperature sensor. Flush motor with motor flush. New oil 0w-40 full synthetic & filter. New crank shaft position sensor New cam shaft position sensor New egr valves New air filter New maf sensor New spark plugs New coils New air filter New cabin filter New vacuum line all around New clamps all around. New catalytic converter $200 on amazon Man,spend about $630.00 altogether and did all the work myself on my spare time and damn it was all worth it..... Car drives amazing smooth and fast, I made it up to 145 mph and it felt like it was flying so I slow back down lol.... I hope this will help anyone with misfire,smoke from the exhaust,and rough idle and no start lol....


Oh forgot to say that I took it to the the shop N its a shame that they told me my motor blew up and it needs a new engine and it cost $6000.00 lol but it was only small things like a head gasket and a couple of sensors.... Thanks to motor flush and seafoam for cleaning up the engine pretty good it was really shiny in the motor when I took it apart not even the oil pan had any yellow gooy stuff lol.

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