Why are my cam chain tensioners breaking on my XK8?
Engine cam chain tensioners are made of plastic and can be known to break up, thus causing chains to jump and bent valves etc. Tensioners are regularly replaced for mk3 metal ones, ask the question, budget 1000 or take the risk. Your advice is spot on. I respect and admire Steve’s advice, but haven’t personally got the balls or the skill to try it.
What’s the problem with the Nikasil cam chain tensioners?
Engine cam chain tensioners are made of plastic and can be known to break up, thus causing chains to jump and bent valves etc. Tensioners are regularly replaced for mk3 metal ones, ask the question, budget 1000 or take the risk. It’s pretty unlikley Nicasil coating failure will be a problem now.
How to know when your timing chain has jumped?
1 Noise – A good indication that a timing chain has jumped is going be noise. 2 Performance Decrease – The engine timing is going to be affected when the timing chain jumps. 3 Service Engine Soon – Your vehicles ECM may or may not have enough input from the engines sensors to detect that the timing chain has jumped. But, it often does.
Do you need to change the oil on a XK8?
Both are V8 killers and you can’t just rely on the engine temperatue gauge either. As a minimum you’ll need to see a FSH with no overextended intervalls between oil changes. If you buy a convertable have the actuating oil changed for the later spec type.
When did the Jaguar XK8 timing chain break?
For Jaguar XK8 engines produced from 1996 to 2000, the original all-plastic timing chain tensioners or guides were susceptible to stress fractures and could break apart.
Why does my Jaguar XK8 make a knocking noise?
In these vehicles, a buzzing/knocking noise may be heard when the ignition is switched ‘ON’ or just after engine start-up. According to the technical bulletin, this noise may be due to a radar scanner inside the adaptive speed control module; in some modules, the scanner would hit its end stops, causing a noise.
Why is my Jaguar X100 XK8 not working?
During normal service, the V8 engines in these vehicles could experience partial blockage of the restrictor in the engine part-load breather – this blockage would restrict the correct operation of the engine breather system.
What does blow by compression test tell you about Jaguar X308 XJ?
A blow-by compression test will indicate whether the cylinder linings are intact – an engine in good condition should rate between 9 and 19 litres of air per minute; more than 30 litres of air per minute indicates worn liners. From August 2000, the Nikasil linings were replaced with steel linings (engine serial number 0008181043).
How big should the engine be on a Jaguar XK8?
If you’re worried you can have a blow by test done, and should see less than 25l/m on a healthy engine. Jaguar heavily revised the V8 alongside the intorduction of steel liners and introduced a different throttle body and waterpump – both of which had caused grief on earlier cars.
How much does it cost to replace chain tensioner on Jaguar XK?
Part of my sale included resolution of all existing mechanical issues. One of the mechanical symptoms was: when the engine was cold there was a valve ticking noise. Sure enough, the timing chains, tensioners, blade, guide, several seals and gaskets were replaced. $840 for parts, $1,300 for labor. Warranty paid for it all!
Is there a video guide for the Jaguar XF?
A guide to how XF’s Park Assist system can steer your XF into suitable parallel or perpendicular parking spaces, and also help you exit parallel spaces. An instructional video on XF’s enhanced range of seat functions and seat memory feature. These video guides take you through the most important features of your XJ.
How to remove cam chain from Jaguar XK8?
The engine has 56k miles on it and is one of the original Nikasil bores. One secondary tensioner is definitely cracked, but as it turns out, all the timing chain tensioners and guides were cracked. We start with the front pulley removal, then the timing chains, cams and then the heads. Loading…
What kind of engine is a 1999 Jaguar XK8?
Please try again later. Removing the cylinder heads from a Jaguar 4.0 V8, normally aspirated, in a 1999 XK8 convertible. The inlet manifold is off, as is the water pump and the radiator fans. The engine has 56k miles on it and is one of the original Nikasil bores.
Can you remove the cylinder heads from a Jaguar XK8?
Removing the cylinder heads from a Jaguar 4.0 V8, normally aspirated, in a 1999 XK8 convertible. The inlet manifold is off, as is the water pump and the radiator fans. The engine has 56k miles on it and is one of the original Nikasil bores.
Is the inlet manifold off on a Jaguar XK8?
The inlet manifold is off, as is the water pump and the radiator fans. The engine has 56k miles on it and is one of the original Nikasil bores. One secondary tensioner is definitely cracked, but as it turns out, all the timing chain tensioners and guides were cracked.