Can low oil affect timing?
The most common cause of timing chain stretch is lack of maintenance and regular oil changes. Worn out oil can no longer lubricate the chain and will cause the rollers and links to wear against each other. As the timing chain wears, this can change the timing of the camshaft and crankshaft.
Why did my timing chain snap on my Jaguar?
Chains stretch, tensioners have to use plastic cushions for the chain, guides can break and are the most likely reason a chain snapped and the engine was ruined (tensioner failure usually only shows as a sliped tooth which causes a missfire). At 22K miles you should be safe. Thank you everyone for clearing that up.
Do you need to change timing chain on Jaguar XK?
My apologies for misleading you, our XK’s definitely have timing chains. The 4.2 in the X150 has the metal tensioner bodies and there is no need to replace just because the car is 10 years old. Yes the auxiliary belts are due a change if not already done but you can just look for signs of cracking.
What kind of timing chain does a V8 4.2 use?
V8 4.2 uses timing chains and tensioners which should last the life of the car and have been greatly improved since the 4.0L. The confusion maybe from the serpentine auxiliary belt which drives the alternator, air con compressor and power steering.
Which is the supercharger belt on a Jaguar R?
The confusion maybe from the serpentine auxiliary belt which drives the alternator, air con compressor and power steering. The R adds a supercharger belt driven off the crankshaft. Both belts should be changed after 10 years. I Have Donated !
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.
What kind of tensioner do you use on a Jaguar V8?
(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. When a plastic tensioner shatters or wears to the point the cam chain becomes loose, a rattling around can be heard in the cam area at the front of the engine.
What’s the issue with the Jaguar XK8 timing chain?
The major issue is that secondary tensioners which – on early cars – are not up to the job and can fail with catastrophic results. The latest secondary tensioners – C2A1511 and C2A1512 are universal and fit all engines. There are differences on the “primary” guides on different engines.
What causes the timing chain tensioner to fail?
Because the timing chain tensioners were made from plastic, they can fail prematurely and cause serious engine damage. A noticeable engine noise while idling or during a cold start can indicate a timing chain tensioner problem.