XF and XFR ( X250 ) 2007 - 2015

Noise on morning Cold startup? [clip]

 
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Old 02-02-2019, 01:31 AM
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Default Noise on morning Cold startup? [clip]

So on my morning startups Iím hearing a weird noise from under the hood. I recorded it and uploaded it , any idea what it is and if itís serious? Yesterday it was even colder and the noise was different sounded like a whistle/whine that went away after a couple of seconds changing in pitch.

I have been told my engine burns oil based on somone saying they saw smoke from my exhaust on startup. Could the noise be the engine burning oil ? Or is it a leak? I checked my oil level and itís OK

I havenít changed my engine air filters in a while I think they are due.

 
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Old 02-02-2019, 10:07 PM
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From the clip it sounds like the timing chain?
 
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Old 02-02-2019, 11:59 PM
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I'm inclined to think so too - try and get someone to record you start it while they're standing over the engine with the hood up so we can get a better listen to it. Let it idle for 20-30 secs and keep recording too
 
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Old 02-03-2019, 12:30 AM
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Yeah, you cut the video way too short...
 
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Old 02-03-2019, 02:25 AM
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I think there may be 2 sounds going on here. Thereís one thump sound at initial ignition and the other is a clicking sound.

I recorded another video today in the garage with not as cold but still sub freezing temperatures. No thump sound this time.

 
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Old 02-05-2019, 07:49 PM
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How many miles on the car?
 
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Old 02-05-2019, 09:06 PM
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Don't know these engines myself too well, but too me is sounding like an external (outside the engine) noise... maybe a bad pulley!?
I mean I hope for you...

To more experienced people out here... do these engines have a hydraulic chain tensioner?
 
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Old 02-05-2019, 10:58 PM
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Originally Posted by mrNewt View Post
Don't know these engines myself too well, but too me is sounding like an external (outside the engine) noise... maybe a bad pulley!?
I mean I hope for you...

To more experienced people out here... do these engines have a hydraulic chain tensioner?
Yep, two of 'em, one on each bank.
Quote from page 56 of the AJ133 Technical Training doc:
"Each camshaft chain has a spring-assisted hydraulic tensioner operated by engine oil pressure. The chain tensioners also incorporate a ratchet mechanism to eliminate start-up noise. The chains are lubricated via oil squirt tubes located at the front of the engine block. Nylon chain guides control chain motion on the drive side."
Get yourself a copy of this doc from my Dropbox here: https://www.dropbox.com/s/8y4iax9hm2...%20V8.pdf?dl=0
Wear on those tensioners and their guides is a common and well known problem, when worn they rattle quite a lot, a few threads/posts around here on the topic. Here's one: https://www.jaguarforums.com/forum/x...-techs-159928/
 

Last edited by OzXFR; 02-05-2019 at 11:13 PM.
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Old 02-05-2019, 11:30 PM
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OzXFR - Thanks for that document!

hen555 - That might be your issue then!? Reading trough the thread that OzXFR posted, kind of hints to that.
That ain't a cheap fix that's for sure... do you know any good mechanic that could help with diagnosing this and help you fix it?
 

Last edited by mrNewt; 02-05-2019 at 11:32 PM.
 
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