Just replaced my tensioner look what I saw (pics)
#1
Just replaced my tensioner look what I saw (pics)
I just got this XJR last week, it has a August 2001 build and I can't find the engine serial no. So I just decided to but a new metal tensioner thinking it still had the 2nd gen plastic ones and voila! See the first picture, the tensioner is plastic and has crack, trouble waiting to happen. My Jag has 83k miles only. Second pic shows newly installed metal tensioner.
Last edited by maniqz; 05-12-2016 at 07:21 PM.
#6
#7
Trending Topics
#8
I just got this XJR last week, it has a August 2001 build and I can't find the engine serial no. So I just decided to but a new metal tensioner thinking it still had the 2nd gen plastic ones and voila! See the first picture, the tensioner is plastic and has crack, trouble waiting to happen. My Jag has 83k miles only. Second pic shows newly installed metal tensioner.
Nice save!
Vector
#10
#11
#12
Gen 1 secondaries "might" give you some warning rattle, 2nd gen? Not so much because of the spring, usually.
All primaries usually rattle before failure, but failure there is not usually catastrophic.
Vector
The following users liked this post:
Johnny_B (05-19-2016)
#13
Now here's the passenger side secondary tensioner, see how the plastic has been taken off the metal piece. How the chain has practically sawed the metal part, yet before I opened the valve cover I never heard any metal to metal grind. I have saved a Jaguar from catastrophic failure, feels good to catch this in time.
#15
#16
I read several disastrous cases of jumping or breaking secondary chains over the years, but never on worn primary chains as a cause, just cracking guides.
#17
Now here's the passenger side secondary tensioner, see how the plastic has been taken off the metal piece. How the chain has practically sawed the metal part, yet before I opened the valve cover I never heard any metal to metal grind. I have saved a Jaguar from catastrophic failure, feels good to catch this in time.
In the oil pan.
The following users liked this post:
Johnny_B (05-19-2016)
#20
Well I agree that the secondary chains may be worn on the outside of the chain where it touched the metal part of the tensioner, but that has nothing to do with the primaries.
Replace the secondary chains if you want to be safe, but they are probably OK.
Experience has taught us that the primary system lasts a long time and gives plenty of warning before it fails, which is not catastrophic anyway.
Secondaries are an easy DIY, primaries are a big job requiring specialized tools and knowledge.
Vector