XJ XJ6 / XJ8 / XJR ( X350 & X358 ) 2003 - 2009

PCV Valve keeps breaking

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Old 10-21-2014, 08:50 PM
cooldood's Avatar
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Default PCV Valve keeps breaking

My new PCV valve has broken. Examination suggests that it is hitting off the suspension turret, going by the marks on both.
This was new valve to replace the broken one that was on the car when I bought her six months ago.
I imagine the engine is twisting in her mounts under heavy load and the rigidly fixed PCV has no option but to hit the turret.
I will have a look underneath at the weekend, but any suggestions, new engine mounts, something bent, or find a way to mount the pcv valve remotely or in a more flexible manner?
 
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Old 10-22-2014, 08:47 AM
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that should of course not happen...my first thought was a broken motor mount allowing the engine to rock too much.
 
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Old 10-25-2014, 10:38 AM
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I have dumped a pile of sealant on it and put it back together, seems okay at the moment, but LTFTs are still high at idle. I hear sucking noises, but those go away when I lift the PCV valve out of cam cover and block the inlet with a finger, so not it that is leaking, Maybe it does not fill the pipe coming out of the camcover that well? There are other hissing noises too. I think I need another car to compare to, should it be 100% hiss free, am I just hearing air moving through tubes or are there multiple leaks?

On a side note, the message center/odometer went blank while I was in the car wash wiping the interior with a cloth. Assumed I had hit a button, but could not find which. Cured it by disconnecting the battery and touching the two cables together.
 
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Old 10-26-2014, 12:16 PM
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Hiss and LTFT say air leak. You need to fix it, it's not rocket science but if you're struggling just find a competent tech.
 
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