Change those tensioners!
#1
![Default](/forum/images/icons/icon1.gif)
I took the advice of so many on here and looked at my secondary chain tensioners in my 1999 XJ8 w/95,000 miles. Note that I had no symptoms of a problem (noise, rough running etc...).
I was rather shocked at the condition of the left side (bank B) sec. chain tensioner.
I had the "usual" split down the middle but the worst part was the "top" of the tensioner that the chain was riding on. The plastic had totally broken off and the chain was riding on the bare metal substrate! I found what was left if the plastic "covering" in the bottom of the head cavity.
I've included 2 links if you would like to see. The pics are a bit washed out but...
Side view of the crack (pretty much normal on these type of tensioners).
http://brianengel.net/JagPics/IMG_5891.jpg
"Top" view of whats left of this side of the tensioner. Note the grooves the chain wore into the metal.
http://brianengel.net/JagPics/IMG_5892.jpg
Of course I am replacing them both but I think I got as close to "death" as possible with this engine!
I was rather shocked at the condition of the left side (bank B) sec. chain tensioner.
I had the "usual" split down the middle but the worst part was the "top" of the tensioner that the chain was riding on. The plastic had totally broken off and the chain was riding on the bare metal substrate! I found what was left if the plastic "covering" in the bottom of the head cavity.
I've included 2 links if you would like to see. The pics are a bit washed out but...
Side view of the crack (pretty much normal on these type of tensioners).
http://brianengel.net/JagPics/IMG_5891.jpg
"Top" view of whats left of this side of the tensioner. Note the grooves the chain wore into the metal.
http://brianengel.net/JagPics/IMG_5892.jpg
Of course I am replacing them both but I think I got as close to "death" as possible with this engine!
#6
#7
Trending Topics
#8
Join Date: Mar 2008
Location: Powell, Ohio U.S.A. 43065
Posts: 2,521
Likes: 0
Received 71 Likes
on
57 Posts
![Default](/forum/images/icons/icon1.gif)
There is a way to replace just the broken secondary chain and tensioner without removing the timing cover, but it is not a Jaguar factory approved procedure or parts source and I haven't done it.
What your guy is likely quoting you is for removing the timing cover, the primary chain, replacing the secondary chain and reassembly. That's the time when it is false economy not to replace both of the primary and secondary tensioners, primary tensioner blades and guide rails, associated gaskets and oil seals, and all four new timing chains unless the mileage is extremely low and there is no damage evident to the other chains. In that case, $2,000. is low.
Lots worse if you bent a pair of exhaust valves.
What your guy is likely quoting you is for removing the timing cover, the primary chain, replacing the secondary chain and reassembly. That's the time when it is false economy not to replace both of the primary and secondary tensioners, primary tensioner blades and guide rails, associated gaskets and oil seals, and all four new timing chains unless the mileage is extremely low and there is no damage evident to the other chains. In that case, $2,000. is low.
Lots worse if you bent a pair of exhaust valves.
Thread
Thread Starter
Forum
Replies
Last Post
Guy-Pierre Boucher
XJ XJ6 / XJ8 / XJR ( X350 & X358 )
7
09-16-2015 05:55 PM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)