S-Type / S type R Supercharged V8 ( X200 ) 1999 - 2008 2001 - 2009
Sponsored by:
Sponsored by:

Cam Chain Tensioners

Old Nov 11, 2021 | 04:52 AM
  #1  
barriectaylor's Avatar
Thread Starter
|
Junior Member
Joined: Apr 2021
Posts: 17
Likes: 6
From: British Columbia
Default Cam Chain Tensioners

My recent purchase has been well maintained and had regular oil changes.
It starts and runs fine except for a stumbling issue I mentioned in another thread.
There are no strange noises on startup or while running.

There is so much talk about Cam Chain Tensioners that make me concerned.
It has relatively low mileage, but it is still twenty years old.
With all the invoices I got from the previous owner, there is no mention about the Tensioners.
Am I playing with fire in not changing the Tensioners?
 
Reply
Old Nov 11, 2021 | 07:30 AM
  #2  
JagV8's Avatar
Veteran Member
15 Year Member
Liked
Loved
Community Favorite
Joined: May 2009
Posts: 27,546
Likes: 4,923
From: Yorkshire, England
Default

If you have a 4.0, inspect & see.
 
Reply
Old Nov 11, 2021 | 09:56 AM
  #3  
NBCat's Avatar
Joined: Jan 2012
Posts: 6,068
Likes: 2,983
From: Newport Beach, California
Default

+1 on removing one of the cam covers and inspecting the secondary tensioners. If the tensioners are the plastic-bodied type, the best thing to do is to replace the primary and secondary timing chains, guides and tensioners. Quite often the primary tensioners crack and bits fall into the sump.
 
Reply
Old Apr 3, 2025 | 09:57 PM
  #4  
stevis05's Avatar
Senior Member
15 Year Member
Top Answer: 1
Joined: Jan 2009
Posts: 317
Likes: 145
From: new england
Default

Astro bill… kudos to you good for you for taking the hands on approach of just taking off valve cover to see for yourself. If you got that far, I feel like you have it in you to repair everything yourself. Although a daunting task do not get overwhelmed, as parts are readily available and there is massive amounts of info out there to help you. I did this myself last year. Primary and secondary tensioners and guides, chains, and a WHOLE Lot more since I was going in. Point is I took my time to research, planned carefully, ordered everything I “thought” I needed in advance to avoid delays, and in the end I couldn’t be happier. I upgraded water pump, therm, housing, temp sensor, vvt system, timing chains, guides, coolant, plugs, gaskets, fixed a faulty cooling fan motor, belt, tensioner, idler, fixed a bad windshield wiper hose, dropped oil pan, cleaned sanded and repainted, cleaned oil pump pickup screen, oil pressure sensor etc… hell I even took advantage of all the open space at the time and changed my front sway bar bushings which took all of ten minutes due to everything being out of the way. Obviously you don’t need to do all that if you don’t want to, I did for my own reasons. But all said and done any shop or dealer in my area would’ve quoted me probably 10-15k for all that, and I did it all for maybe 1500 bucks and a lot of my time. And now I know I can fire it up whenever I want and just drive, not worrying if my timing chain will break and explode my block and go through my hood at any moment. Peace of mind is priceless
 
Reply
Old Apr 5, 2025 | 08:35 AM
  #5  
Joedotcom's Avatar
Senior Member
10 Year Member
Liked
Loved
Joined: Mar 2015
Posts: 240
Likes: 117
From: STOKE ON TRENT
Default

Hi
The 4.2's dont have timing chain or tensioner issues, only the 4.0 v8s do, they were revamped on the 4.2 and dont give any problems
if you getting a rattle on start up and its a later car, its usually the variable timing pulleys, they can get blocked to lack of oil changes
Ive known people cure it with using a engine oil flush a few times to get them to clear, new pulleys are really expensive
cheers
Joe
 
Reply
Old Apr 5, 2025 | 10:39 AM
  #6  
NBCat's Avatar
Joined: Jan 2012
Posts: 6,068
Likes: 2,983
From: Newport Beach, California
Default

Unfortunately, I have seen secondary chain tensioners fail on the AJ33/AJ34 as late as MY2007. It's always best to check their condition by removing the cam covers.
 
Reply
Old Apr 5, 2025 | 12:24 PM
  #7  
clubairth1's Avatar
Veteran Member
15 Year Member
Community Builder
Community Influencer
Liked
Joined: May 2009
Posts: 12,134
Likes: 3,383
From: home
Default

Agreed. 4.2L are much better but FORGET that they don't have any tensioner issues. They do just much less frequently.
I also think it's better to get a 2003 and up model as those came with improved parts plus the much better 6 speed ZF compared to the earlier Ford 5 speed AT.

Yes if you have the 4.0L and it has not been updated your on borrowed time. Now you might have gotten lucky and they were changed but you just don't have the paperwork.
But follow JagV8's advice and take a look. It's too important to ignore!
.
.
.
 
Reply
Old Apr 5, 2025 | 01:41 PM
  #8  
scottjh9's Avatar
Veteran Member
5 Year Member
Liked
Loved
Community Favorite
Joined: May 2018
Posts: 2,151
Likes: 761
From: california
Default

Originally Posted by stevis05
Astro bill… kudos to you good for you for taking the hands on approach of just taking off valve cover to see for yourself. If you got that far, I feel like you have it in you to repair everything yourself. Although a daunting task do not get overwhelmed, as parts are readily available and there is massive amounts of info out there to help you. I did this myself last year. Primary and secondary tensioners and guides, chains, and a WHOLE Lot more since I was going in. Point is I took my time to research, planned carefully, ordered everything I “thought” I needed in advance to avoid delays, and in the end I couldn’t be happier. I upgraded water pump, therm, housing, temp sensor, vvt system, timing chains, guides, coolant, plugs, gaskets, fixed a faulty cooling fan motor, belt, tensioner, idler, fixed a bad windshield wiper hose, dropped oil pan, cleaned sanded and repainted, cleaned oil pump pickup screen, oil pressure sensor etc… hell I even took advantage of all the open space at the time and changed my front sway bar bushings which took all of ten minutes due to everything being out of the way. Obviously you don’t need to do all that if you don’t want to, I did for my own reasons. But all said and done any shop or dealer in my area would’ve quoted me probably 10-15k for all that, and I did it all for maybe 1500 bucks and a lot of my time. And now I know I can fire it up whenever I want and just drive, not worrying if my timing chain will break and explode my block and go through my hood at any moment. Peace of mind is priceless
it took me 7 years to get to start and drive with that type of peace of mind. You are right. That feeling is priceless
 
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
djws61
XK8 / XKR ( X100 )
10
Nov 29, 2021 05:21 PM
EZDriver
XK8 / XKR ( X100 )
15
Apr 19, 2011 11:32 AM
JagXK82001
XK8 / XKR ( X100 )
10
Mar 30, 2011 08:54 AM
SportyandMisty
XJ XJ8 / XJR ( X308 )
3
Mar 27, 2009 06:08 AM

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 

Thread Tools
Search this Thread

All times are GMT -5. The time now is 09:06 PM.