illjill Posted February 11, 2009 Report Share Posted February 11, 2009 (edited) I've had my quest sitting since about nov-dec of 08 (for the winter)..I put new valve stem seals in about a month ago and I havent driven it at all since then until 2-3days ago. I took it out for a long smooth run, ran excellent. Well afterwards, I got back home and when I went to check my oil..I pulled out the dipstick and heard like, its hard to explain, but air. Like there was pressure built up in the block. I know this is verrry not good! It never did this before. what the hell could it be? :\ Edited February 11, 2009 by illjill Link to comment Share on other sites More sharing options...
Dred_85.5_TSI Posted February 11, 2009 Report Share Posted February 11, 2009 PCV valve? If you replace it go with the one from the dealer. Link to comment Share on other sites More sharing options...
BrazilBoy Posted February 11, 2009 Report Share Posted February 11, 2009 (edited) :iagree: Remove PCV Valve rattle back and forth if you don't hear it rattle then its gummed up. Try a little carb cleaner then cover both ends with your fingers and shake back and forth drain out the goo. Take it for a spin. If alls cool afterward then you know for sure its the PCV valve..... Edited February 11, 2009 by BRAZILBOY Link to comment Share on other sites More sharing options...
Technology Posted February 11, 2009 Report Share Posted February 11, 2009 And, if you're feeling saucy, you can blow on the barbed end to see if it's fully sealing closed under positive pressure. Also, did you just shut off the engine? If so, then it could very well be a cylinder that came up on a compression stroke and didn't fire so there was 120-140psi all bottle up and it was seeping past the rings. Link to comment Share on other sites More sharing options...
TurboRaider Posted February 11, 2009 Report Share Posted February 11, 2009 And, if you're feeling saucy, you can blow on the barbed end to see if it's fully sealing closed under positive pressure. Also, did you just shut off the engine? If so, then it could very well be a cylinder that came up on a compression stroke and didn't fire so there was 120-140psi all bottle up and it was seeping past the rings. Considering that there is a breather at the back of the valve cover both the PCV and the back of the valve cover would have to be plugged up. Kevin Link to comment Share on other sites More sharing options...
Dad Posted February 11, 2009 Report Share Posted February 11, 2009 Considering that there is a breather at the back of the valve cover both the PCV and the back of the valve cover would have to be plugged up. Kevin ^^^^^^ +1 what he said. Seems unlikely that the entire system is closed tight. Dad Link to comment Share on other sites More sharing options...
JustPaus_88TSi Posted February 12, 2009 Report Share Posted February 12, 2009 (edited) Was this mild air "pulses" coming from the oil cap area(with cap off)? It's normal. Edited February 12, 2009 by JustPaus_88TSi Link to comment Share on other sites More sharing options...
illjill Posted February 13, 2009 Author Report Share Posted February 13, 2009 (edited) no its wasnt a pulse at all. and I pulled out the oil dipstick, not the cap. It just sounded like pressured air being released whenever I pulled it out. and i checked the PCV valve. I took it off, shook it, and blew through it. it sounded fine and air passed right through. I put it back on and put my car on and squeezed the line coming from the pcv valve and I could feel air going through. :\ could this have to do with the valve stem seals I put in? Edited February 13, 2009 by illjill Link to comment Share on other sites More sharing options...
Edde Posted February 13, 2009 Report Share Posted February 13, 2009 If everything stock is there and connected right this can't happen. You have a pipe from the rear of the VC to an oil separator - it has one hose back to the intake boot and another going back to the oil pan. 3 hoses on it. The PCV valve must pass free air one way only and stop the other way. Link to comment Share on other sites More sharing options...
PDX87Starion Posted February 13, 2009 Report Share Posted February 13, 2009 and i checked the PCV valve. I took it off, shook it, and blew through it. it sounded fine and air passed right through. Which way did you blow through? Like Edde said it has to be a one way valve. Letting air only go from the VC, not into it. Only a OEM mitsu PCV will stop the boost from going into the VC. Any aftermarket "parts store" PCV will not hold back the boost pressure, even though its listed as the correct one in their system. I learned this when I bought a new one. It would not hold back the pressure from my lungs. The OEM one was pulled out of the garbage and tested good, so that went back on, and the new aftermarket one was thrown away instead. I can only imagine how many have been replaced over the years from routine maintenance with these after market ones that are not "turbo" approved. Link to comment Share on other sites More sharing options...
Edde Posted February 13, 2009 Report Share Posted February 13, 2009 Which way did you blow through? Like Edde said it has to be a one way valve. Letting air only go from the VC, not into it. Only a OEM mitsu PCV will stop the boost from going into the VC. Any aftermarket "parts store" PCV will not hold back the boost pressure, even though its listed as the correct one in their system. I learned this when I bought a new one. It would not hold back the pressure from my lungs. The OEM one was pulled out of the garbage and tested good, so that went back on, and the new aftermarket one was thrown away instead. I can only imagine how many have been replaced over the years from routine maintenance with these after market ones that are not "turbo" approved. Yeah I haven't found a bad OEM one yet. But still even this couldn't really cause pressure to build up and hold when the engine is stopped, right? Link to comment Share on other sites More sharing options...
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