What kind of chain tensioner should I get for my XJ8?
A reddish/orange (mk1) or cream (mk2) plastic tensioner body is bad news, a grey aluminum metal one (mk3) is good. The cam phasing on the V8 means the timing gear works hard and timing chains can stretch at high mileages or on neglected cars.
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.
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!
What kind of tensioner do you use on a Jaguar?
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 are the chains on a Jaguar XK8?
All four chains have guides and tensioners which are prone to wear and degradation. 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.
A reddish/orange (mk1) or cream (mk2) plastic tensioner body is bad news, a grey aluminum metal one (mk3) is good. The cam phasing on the V8 means the timing gear works hard and timing chains can stretch at high mileages or on neglected cars.
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 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.
How much does it cost to replace chain tensioners?
If this is identified then a full chain and tensioner replacement is required costing up to £1000. If the chains/sprockets and guides are OK then it’s a wise precaution to fit the mk3 secondary tensioners which is a fairly easy DIY job. Tensioners cost around £75 a set plus a couple of quid for new bolts.
When did the XJ8 engine get a VIN number?
Engines were revised in late 1999 model year from AJ26 version to AJ27. A car fitted with the revised engine version can be identified by a VIN number ending in five, not six digits.
How can I tell if my Jaguar XJ8 is in good condition?
Jaguar dealers can perform a blow by check to determine engine condition. A good condition engine will show less than 25 l/m, anything over 40 l/m will make a good Top Gear coffee table. Impellors on AJ26 water pumps can disintegrate giving a loss of efficiency leading to overheating and potential head gasket failure.
If this is identified then a full chain and tensioner replacement is required costing up to £1000. If the chains/sprockets and guides are OK then it’s a wise precaution to fit the mk3 secondary tensioners which is a fairly easy DIY job. Tensioners cost around £75 a set plus a couple of quid for new bolts.
Engines were revised in late 1999 model year from AJ26 version to AJ27. A car fitted with the revised engine version can be identified by a VIN number ending in five, not six digits.
Jaguar dealers can perform a blow by check to determine engine condition. A good condition engine will show less than 25 l/m, anything over 40 l/m will make a good Top Gear coffee table. Impellors on AJ26 water pumps can disintegrate giving a loss of efficiency leading to overheating and potential head gasket failure.
Why do you need cam chain tensioners in a Jaguar?
In their zeal to reduce the weight of the valve train and related components as a way of improving fuel efficiency, the engineers under designed the AJ-V8’s timing gear: in particular, the cam chain tensioners.
How long does it take to replace Jaguar tensioners?
We only use Jaguar’s third-generation metal tensioners. Should you elect to replace your tensioners, make an appointment and we normally have a 48-hour turnaround. Our 12-month, unlimited mileage warranty will apply to all parts and labour. Could you experience the problem with the new tensioners after replacement is carried out?
Can a jagutek Service department replace timing gear?
As a preventive maintenance operation, Jagutek service department, can replace your timing gear with improved components. At Jagutek, we use exactly the same parts the Jaguar dealers do, and having done so many V8 timing gear upgrades, we are highly expert and efficient at this procedure.
(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.
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!
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 difference between double and single chain Jaguar?
These plastic components are part of the AJ-V8’s single-chain design, a weight-saving alternative to the more robust double-chain approach Jaguar has used on most of its six-cylinder engines. (The new 4.2L version of the Jaguar AJ-V8 engine has double timing chains.)
How do you replace a Porsche timing chain tensioner?
Use a 27mm socket and ratchet to break loose the tensioner. Note that the tensioner has lots of threads; therefore, it will take a lot of turning to remove it. Replace one tensioner at a time. Prime the new tensioner. Soak the new tensioner in engine oil; while it is soaked in oil, pump it a few times to prime it.
Can a loose tensioner cause a cam sprocket to fail?
As the tensioners wear, the cam chains can become loose and eventually jump one or two teeth on the cam sprockets – usually on a cold start. If the chain jumps one tooth, rough running will be experienced. If it jumps more than one tooth, the valves on one block will contact the pistons, resulting in engine failure.
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 does the timing chain tensioner make the tapping noise?
Thing is the car only makes the tapping noise when the car is at full operating temp which i would assume when the oil is at its thinnest. Thing is the car only makes the tapping noise when the car is at full operating temp which i would assume when the oil is at its thinnest.
As the tensioners wear, the cam chains can become loose and eventually jump one or two teeth on the cam sprockets – usually on a cold start. If the chain jumps one tooth, rough running will be experienced. If it jumps more than one tooth, the valves on one block will contact the pistons, resulting in engine failure.