V12 Timing Chain rattle
#1
V12 Timing Chain rattle
We were slightly off mission today and got distracted by a "cheap" XJS that was advertised locally.
The owner said it ran but made a "ticking" noise....
Neither myself nor smgdata had heard this particular sound from a V12 before......
Unfortunately on closer inspection it appeared to have a broken timing chain tensioner. We could wiggle the timing chain about an inch with a screw driver through the oil filler cap.
Just wanted to get feedback if our diagnosis was correct ?
The owner said it ran but made a "ticking" noise....
Neither myself nor smgdata had heard this particular sound from a V12 before......
Unfortunately on closer inspection it appeared to have a broken timing chain tensioner. We could wiggle the timing chain about an inch with a screw driver through the oil filler cap.
Just wanted to get feedback if our diagnosis was correct ?
Last edited by Sarc; 08-13-2017 at 11:53 PM.
#2
#3
The following 2 users liked this post by Grant Francis:
orangeblossom (08-14-2017),
smgdata (08-15-2017)
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#7
Rumor? No... Real life. All AJ26 and AJ27 until August 2001 will die if not treated Done it about 19 times since last year!
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#8
Anyhow... I'll then drive like an old Volvo red block owner. Until the chain/belt snaps... And then simply fit a new one
#9
The valve noise you are remembering is when the HE drops a valve seat from massive overheating. Generally mashes itself into a pulp, then the head of the valve parts company with the stem, and the piston becomes a very LO comp version.
The preHE did not have that problem that I have ever come across.
Drive it like ya stole it, the only way to keep a V12 running proper.
The preHE did not have that problem that I have ever come across.
Drive it like ya stole it, the only way to keep a V12 running proper.
The following users liked this post:
Sarc (08-16-2017)
#10
The valve noise you are remembering is when the HE drops a valve seat from massive overheating. Generally mashes itself into a pulp, then the head of the valve parts company with the stem, and the piston becomes a very LO comp version.
The preHE did not have that problem that I have ever come across.
Drive it like ya stole it, the only way to keep a V12 running proper.
The preHE did not have that problem that I have ever come across.
Drive it like ya stole it, the only way to keep a V12 running proper.
The last drive I did in mine before taking it apart was to go to a tunnel and just toe it! 1st gear and wellies! Oooooh did that sound nice! There aren't many tunnels here, so I went to my nearest one late at night... Mmmmhm delicious!
The following 2 users liked this post by Daim:
Grant Francis (08-15-2017),
orangeblossom (08-15-2017)