How many timing chains does a jaguar have?
First of all – there are four timing chains on the Jaguar V8 engine – the so-called “primary” chains x2 which connect crankshaft to camshafts, and the “secondary” chains x2 which connect the two camshafts to each other. All four chains have guides and tensioners which are prone to wear and degradation.
What was the problem with the chain tensioner on my 1998 Jaguar?
Nalley of Roswell, GA, Thsi tensioner thing is a real problem. I have a 1998 VDP with the 4.0 liter engine. With the car out of warranty and with 69000 miles on the engine, one of the chain tensioners failed, resulting in one of the valves punching through a piston.
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!
How does a chain tensioner work on a JAG?
That’s an expensive failure. Gwen – The Jag V8 you have uses a chain drive (like a bicycle chain) to drive the cams that open and close the engine’s valves. The tensioners keep the chain tight so it doesn’t flop around; they work like the spring loaded derailleur on a bike.
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.
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.
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!
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.
How long does a timing chain last in an engine?
This is especially important considering that many modern engines are known to consume oil. In a well-maintained engine, a timing chain can last up to 300,000 miles or even longer.
Can a timing chain be replaced on a pushrod car?
In old-style pushrod engines, replacing the timing chain is a fairly easy task. No such luck if you have a modern front-wheel drive car with a transversely-mounted engine, as the space in the engine compartment could be very tight.
Why is my timing chain wearing out on my RX 350?
The timing chain problems are not uncommon, especially in high-mileage vehicles. Similarly to any other moving mechanical components inside any engine, a timing chain is subject to wear. A timing chain is lubricated by the engine oil. Lack of oil changes, low oil level or poor oil quality can cause the timing chain to wear faster.
When do you know to change the timing chain?
A timing chain runs inside the engine, as it needs to be lubricated by the engine oil. A timing belt typically needs to be replaced between 40,000 and 100,000 miles depending on the vehicle and it’s a few hundred dollar repair. A timing chain doesn’t need to be replaced unless there is a problem with it.
In old-style pushrod engines, replacing the timing chain is a fairly easy task. No such luck if you have a modern front-wheel drive car with a transversely-mounted engine, as the space in the engine compartment could be very tight.
The timing chain problems are not uncommon, especially in high-mileage vehicles. Similarly to any other moving mechanical components inside any engine, a timing chain is subject to wear. A timing chain is lubricated by the engine oil. Lack of oil changes, low oil level or poor oil quality can cause the timing chain to wear faster.
How is a timing chain different from a bicycle chain?
Timing chain. A timing chain is made of metal, similar to a bicycle chain. A timing chain runs inside the engine, as it needs to be lubricated by the engine oil.