LR3 4.4 valve cover leak?
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LR3 4.4 valve cover leak?
Okay, this is driving me nuts. Maybe its normal to hear what sounds like a vacuum leak. I think I noticed this since I got the truck, but it runs well and economy is not bad. Recently I have been running without the beauty cover, so its a lot more noticeable. Today I removed the fan just to help isolating the noise, but I can not pin-point it. It sounds like the PCV valve. Its a new one, so I put the old one back in. No change. I went over numerous lines and the only way to make the noise stop was to remove the PCV valve at the valve cover. With valve still attached to vacuum hose the engine runs and the sound is 100% gone. So its not an intake manifold leak or any other hose. Or the valve or the hose to the PCV valve. So that leaves the valve cover gasket OR the valve normally makes a hissing/leak noise on its own when working. Also I put in two new VVT sensor seals.
My searching does not seem to bring up any threads on valve cover leaks. Thus I am not sure how difficult the procedure is. I am also not sure how to further test this idea. Any input would be appreciated.
My searching does not seem to bring up any threads on valve cover leaks. Thus I am not sure how difficult the procedure is. I am also not sure how to further test this idea. Any input would be appreciated.
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