boosd Posted August 20, 2012 Share #1 Posted August 20, 2012 I was removing a few hoses to replace and found that one of them contained a black sludge..... this sludge was also in the pipe leading into and out of the hose, my question is what is this hose suppose to be moving and is there a good way to clean this out, im sure its not suppose to be moving this through the engine..... The pictures show what the hose was, and what dripped out of it, and where the hose ran between, when I put a paper towel into the pipe that goes into the block there was a thick sludge on it like old oil. Link to comment https://www.classiczcars.com/topic/44157-black-sludge-in-hose/ Share on other sites More sharing options...
clayton 260z Posted August 20, 2012 Share #2 Posted August 20, 2012 It is your hose from your crank case to your pvc valve (positive crankcase ventilation) it allows vapers to be removed from the crank case to help stop the build up of sludge and moisture in your engine. It appears that it is original and would have sludge built up in it. I would replace hose and your pvc valve, and look at a good product to run thru your crank case to remove any build up, and CHANGE your oil. Link to comment https://www.classiczcars.com/topic/44157-black-sludge-in-hose/#findComment-399288 Share on other sites More sharing options...
boosd Posted August 20, 2012 Author Share #3 Posted August 20, 2012 Could i just leave it open? I have no emissions testing here.... Link to comment https://www.classiczcars.com/topic/44157-black-sludge-in-hose/#findComment-399289 Share on other sites More sharing options...
Carl Beck Posted August 20, 2012 Share #4 Posted August 20, 2012 That is your PCV valve and hose.During both the Combustion and Exhaust strokes - vapors can blow by the piston rings - and wind up in your crankcase. As the rings wear, the amount of blow by will increase.Because the crankcase is sealed to prevent the vapors from blowing into the atmosphere - the PCV hose and valve are in place to redirect them back into the intake manifold - and back into the cylinders to be burned. This happens only when the pressure in the crankcase is greater than the pressure in the intake.On older engines {prior to about 1966} these vapors were simply vented to the atmosphere so they didn't build up. If they are not vented - they contaminate your engine oil and lead to sludge build up. Not to mention making your engine work harder on the intake stroke and reducing efficiency of the Power stroke.As suggested replace both the Valve and Hose - and change the oil & filter. If that problem has existed for some time - which it sounds like it has - might be a good idea to drop the oil pan and clean it out as well. {but that is not a real easy job}.FWIW,Carl B. Link to comment https://www.classiczcars.com/topic/44157-black-sludge-in-hose/#findComment-399290 Share on other sites More sharing options...
Carl Beck Posted August 20, 2012 Share #5 Posted August 20, 2012 Could i just leave it open? I have no emissions testing here....Many people do - some people at least put a filter on the outlet, or redirect it to a catch can. It won't hurt the engine to leave it open.FWIW,Carl B. Link to comment https://www.classiczcars.com/topic/44157-black-sludge-in-hose/#findComment-399292 Share on other sites More sharing options...
olzed Posted August 21, 2012 Share #6 Posted August 21, 2012 It won't hurt the engine to leave it open.FWIW,Carl B.Won't hurt, but might fume and smell in the car. Link to comment https://www.classiczcars.com/topic/44157-black-sludge-in-hose/#findComment-399308 Share on other sites More sharing options...
Reverend Posted August 21, 2012 Share #7 Posted August 21, 2012 Yea, like there is not enough fumes in Z's already Link to comment https://www.classiczcars.com/topic/44157-black-sludge-in-hose/#findComment-399331 Share on other sites More sharing options...
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