why would oil be leaking from the blow off valve?
Why would oil be leaking from a blow off valve?
i own a 05' gti 1.8t, i have had the blow off valve for about a year now, its a HKS SSQV, but i just revently noticed that when it blows off, there is a spray of oil that comes out..... why would it be leaking oil through the blow off valve? i know VW dont really go well with blow off valves, but it hasnt given me any problems until recently....
vw has a pcv system it recirculates the crankcase air into the intake, your car if fairly new, but this is most likely the problem.
at least its the most simple to check / fix. i dought the turbo is gone if its the stock ko3s, they can take a beating.
the pcv valve is the black saucer shaped peice (kinda looks like the stock diverter valve) , its in the TIP by your N75 valve. these get filled with oil and start to dump in into the intake.
did you switch the set up to run the BOV on the cold side? like off the throtal body hose? if so, this could STILL be the problem.
if you take off your lower inercooler pipe and look inside for oil build up. and pull the n75 valve out and check it for oil.
id think aboout replacing the pcv valve with a catch can.
your real problem is yet to be noticed if your dumping the air out and not recirculating it into the intake, the car WILL RUN RICH, as it reads the air it adds fuel, but with a BOV your loosing some air BUT keeping the fuel. so id expect to see some bad cats and o2 sensors
good luck
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