What happens if a tensioner fails on an XJ8?
XJR8s are also susceptible but possibly to a lesser degree because they use a simpler timing mechanism. The tensioner’s job is to keep the timing chain tight. If a tensioner fails, the timing chain becomes loose and the chain can jump one or more teeth on the cogs in the engine. Apparently one jumped tooth results in rough running.
When did the Jaguar XJR steel tensioner come out?
Jaguar released a steel tensioner in 2002/2003. Some Jaguar technicians have reported fitting this steel tensioner during preventative maintenance. It is possible to upgrade all your tensioners and preferably to the steel version. This is quite a big job costing approximately 2000 pounds or 3000 euros at a main dealer.
Why is my XJ8 engine making a noise?
Research has shown that a noise can originate at the chain tensioners to cause a resonance in another part of the engine. A revised, spring assisted, secondary timing chain tensioner has been introduced to eliminate this concern, commencing at engine No. 98102106XX. Introductory VINs are not yet available.
When did Jaguar change the timing chain tensioner?
In 2000 there was an upgrade to the timing chain tensioners and another one in 2001 this was in addition to the change over to cast iron liners in the engine block as well.
When to get a tensioner replaced on a Jaguar XJ8?
If you would like us to do a tensioner replacement under third-party warranty, please supply us with contact information about your warranty provider before we start the job. We recommend that if your XJ8/XK8 has passed 35,000 miles, you take preventive action and have the tensioners inspected.
When did the Jaguar tensioner Bulletin come out?
In their Technical Service Bulletin No. X303-68 of February 2005, titled “Rattle From Engine on Start-up and Idle,” Jaguar states: This Technical Bulletin has been issued to address customer concerns of a rattle emanating from the engine on start-up and idle.
Why are my cam chain tensioners breaking on my Jaguar?
(The new 4.2L version of the Jaguar AJ-V8 engine has double timing chains.) As a result of their weak design and other factors like engine overheating or poor maintenance, the plastic cam chain tensioners on 1997 to 2000 V8 Jaguars began to experience stress fractures, and so did some of the plastic guides.
When did the third generation tensioner come out?
In 2005, Jaguar introduced a third-generation metal-based tensioner kit. (See the photos at left.) We now use the metal-based third-generation tensioners exclusively when replacing cracked first- and second-generation Jaguar V8 tensioners.
How does a Hydro Boost steering system work?
Proper diagnosis of hydro-boost related problems requires an understanding of how the system works. A typical hydro-boost is shown in Figure 1. The hydro-boost is plumbed in line with the steering gear. The power steering pump supplies pressurized fluid for both the power steering gear and hydro-boost.
When to buy an XJ8 / xjr8 1997-2003?
Buy an XJ8/XJR8 that was registered after 1st January 2000. By purchasing a car registered after that date you bypass the 3 biggest issues. Your car has avoided high sulphur fuel, you have the upgraded (2nd generation timing tensioners), and your car won t stall on motorways (upgraded throttle body).
What to do if your 1998 XJ8 Rattle?
My 1998 XJ8 3.2 had this rattle. The best way to hear the rattle is to open the bonnet, and get someone else to start the car while you listen at the front of the engine. Make sure you have left the car overnight (really overnight) so that the tensioners have lost all their pressure.