engine noise
#1
engine noise
I have developed a pretty distinct clacking noise from the engine in my 1999 XK8 with 98K miles.I suspect a valve adjustment and or timing chain replacement is due. This engine does have the nicosil coated cylinders and i wonder if they may be noisy as well. Before starting my teardown I am trying to find a chiltons or haynes repair manual in book form.
I cant seem to find these books on line, any thoughts appreciated.
Thanks again
MEM
I cant seem to find these books on line, any thoughts appreciated.
Thanks again
MEM
#2
If there was going to be an issue with the nikasil cylinder bores, it would most probably have appeared long before now as the fuel with sulphur content that caused the premature and excessive wear was withdrawn years ago.
Graham
#3
Be sure to eliminate the clicking of the purge valve as a cause of the noise. It is located on the driver side wheel well. The clicking is head most at idle and when the weather is cold. It cycles on and off every minute or so. Just a thought.
#4
Join Date: Apr 2012
Location: Summerville, South Carolina
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There is no Haynes or Chilton's for our car. Your best bet is the forum itself - if you go to the XK8/XKR forum and look for the stickies. Find the DIY sticky (link also posted below) and scroll down to the Workshop Manual and download the Second Edition
https://www.jaguarforums.com/forum/x...ts-data-29800/
As someone who has just suffered a broken secondary timing chain - recommend investigating ASAP before driving any further
https://www.jaguarforums.com/forum/x...ts-data-29800/
As someone who has just suffered a broken secondary timing chain - recommend investigating ASAP before driving any further
#5
I would recommend the first step in investigating would be to remove the serpentine belt. Start the engine without the belt in place. If it still makes the noise it is engine related.
If the noise stops then start checking pulleys for bad bearings and check the tensioner for a weak spring. A bad belt tensioner will make a clicking noise as well as a bad pully bearing.
If the noise stops then start checking pulleys for bad bearings and check the tensioner for a weak spring. A bad belt tensioner will make a clicking noise as well as a bad pully bearing.
#6
you should really be judicious about starting that engine again. at your mileage the tensioners need to be updated anyway unless you have proof that they were already replaced. start the job of replacing the upper and lowers and you will discover if this was the source of the problem. if the sound still remains, it will not be something serious.
#7
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#8
There is an old toy that was a wooden U with a loose piece of wood between the U, when shaken it would make a "clacking" sound. That is about the best description I can imagine, Its not a tapping sound from loose tappets common in older cars. It is not too loud (cant hear from in car) and is loudest at idle, frequency increases and volume decreases with higher RPM. I believe it is the tensioners but appreciate any comments you all may have.
Thankyou
MEM
Thankyou
MEM
#9
#11
Join Date: Jan 2012
Location: Newport Beach, California
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#12
I have two videos on the attached link with noise that is related to the tensioners see if that is what you are hearing.
Link JagRepair.com - Jaguar Repair Information Resource
Link JagRepair.com - Jaguar Repair Information Resource
#14
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