Noise on morning Cold startup? [clip]
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From: Ontario, Canada
Noise on morning Cold startup? [clip]
So on my morning startups I’m hearing a weird noise from under the hood. I recorded it and uploaded it , any idea what it is and if it’s 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 it’s OK
I haven’t changed my engine air filters in a while I think they are due.
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 it’s OK
I haven’t changed my engine air filters in a while I think they are due.
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From: San Francisco, CA
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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From: Ontario, Canada
I think there may be 2 sounds going on here. There’s 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.
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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Joined: Jan 2019
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From: GTA
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?
I mean I hope for you...
To more experienced people out here... do these engines have a hydraulic chain tensioner?
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From: Adelaide, South Australia
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; Feb 5, 2019 at 11:13 PM.
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From: GTA
@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?
@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; Feb 5, 2019 at 11:32 PM.
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