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Timing belt or chain?

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  #1  
Old 12-24-2007, 05:22 AM
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Default Timing belt or chain?

Trying to gather some facts before a purchase.

I am just trying to get a feel for what an X-type engine will need for maintence. As noted in a previous post I am used to 45k mile Timing belt change intervals on my Porsche 944. I know the Jag shares a basic block with the Ford Modeo. So I ask is there a timing chain or belt? On either one are the parts that should demand special attention? Like on my 944S2 the cam chain tensioner tying the intake cam and exhaust cam was usually the culprit in cam failures.

Does the Jag X-type 3.0L had any variable valve timing or cam timing?
What is the compression of the 3.0L?

Any Achilles heel for the Jag engine? I know in BMW's I-6's it is usually the H20 pump and radiator.
Thank you kindly for all the time and help!

~ Charles
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Old 12-24-2007, 05:38 AM
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Default RE: Timing belt or chain?

Its a VVTi (to get the most of of economy and performance belive it or not) with timing chain.
Would have to look up compression ratio.
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Old 12-24-2007, 05:41 AM
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Default RE: Timing belt or chain?

The 2.0, 2.5 and 3.0 litre 24 valve V6 engines have four overhead camshafts and are driven by two timing chains. All three engines incorporate electronic engine management with distributorless ignition system, sequential electronic fuel injection. All three have two catalytic converters in the exhaust system which includes two oxygen sensors and two catalytic monitor sensors.Viewed from the rear of the engine, the right-hand cylinder bank is numbered 5,3,1 and the left-hand cylinder bank is numbered 6,4,2.The engines include the following:
10.75:1 compression ratio on the 2.0 litre engine.
10.3:1 Compression ratio on the 2.5 litre engine.
10.5:1 Compression ratio on the 3.0 litre engine.
3 Stage variable geometry intake manifold.
Lightweight valve gear.
Unique camshaft lift and duration.
Single knock sensor engine management control.
Continuous variable camshaft timing (VCT) system.
Twin mass flywheel (manual transmission).

Variable Intake System (V.I.S).
The variable intake system consists of a three stage upper intake manifold assembly, two position electronically driven gate valves and an engine management powertrain control system.The powertrain control module switches the intake manifold tuning valves between fully open and fully closed at calibrated engine speeds.The intake manifold efficiency is therefore increased which will also increase the engine torque and engine performance.
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Old 12-24-2007, 07:25 AM
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Default RE: Timing belt or chain?

Hello BuckMR2,

thanks for the great info. I have a 2.5 auto, since I have a timing chain, does this ever need replacement or adjusting? Just curious.

Happy Holidays!
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Old 12-24-2007, 12:05 PM
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Default RE: Timing belt or chain?

Buy a brand new 2007 Jaguar x-type 3.0 AWD. They probably have great deals since itsa leftover. Also you wont have to worry about doing repairs to the car for at least 4 years 50k miles. If anyone has the chance always try to get into a brand new car.
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Old 12-24-2007, 01:12 PM
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Default RE: Timing belt or chain?

I might have read somewhere that they are supposed to be good for at least 120k but I cant remember.
Its not even mentioned on Jags maintenence sheets, try asking the workshop at your local dealer if no one on here knows for sure.
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Old 12-24-2007, 04:17 PM
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Default RE: Timing belt or chain?

BuckMR2,
Thank you for the generous information!
Is the powertrain control module prone to failure often?
Regarding the Distributorless ignition, does the Jag use a C.O.P (coil on plug) setup or coilpacks with ignition wires running to the spark plugs?
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Old 12-26-2007, 10:52 AM
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Default RE: Timing belt or chain?

Quote:
ORIGINAL: jasonzimbran

Buy a brand new 2007 Jaguar x-type 3.0 AWD. They probably have great deals since itsa leftover. Also you wont have to worry about doing repairs to the car for at least 4 years 50k miles. If anyone has the chance always try to get into a brand new car.
At 51k, expect to replace the tranny since you can't get the manual anymore. I wouldn't touch an Auto X-Type with a 10 foot pole. The tranny shop that did my clutch has replaced quite a few in the last 3-4 years.

If I could have still gotten the X-Type brand new with a manual tranny and a sport package without the chrome, then I'd be all in for one. Otherwise, no.
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Old 12-26-2007, 07:55 PM
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Default RE: Timing belt or chain?

Why sparty? That clutch almost cost you what they want for a refurbished tranny!
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Old 04-27-2013, 04:53 AM
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I've read that the 2.5 and 2.7 have timing belts, while the 3.0 has a chain. Belts, are suppose to be changed at 60 - 75,000 miles, while chains you don't touch. Just some information I've cam across...
Jim
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Old 04-27-2013, 08:35 AM
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Jim, I don't think your info is quite right.

If you're talking Petrol engines, they're all variations of the AJ-V6 engine:
Jaguar AJ-V6 engine - Wikipedia, the free encyclopedia, and they all use chains.

If you're talking Diesel, then the 2.7 was never fitted to the X-Type, however the 2.0 and 2.2 were:
Ford Duratorq engine - Wikipedia, the free encyclopedia

Rgds

Rob
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Old 04-27-2013, 09:07 AM
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Yeah, that is not right. Plus, the X-Type doesn't have a 2.7 liter engine option.
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Old 04-27-2013, 10:27 AM
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The 2.5 and 3.0 V6's have timing chains. I've never heard of a valve drive system failure for these engines (but if you abuse it enough...). The engine was originally designed by Porsche and is essentially Ford built.
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Old 04-28-2013, 10:30 AM
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And the thread you are replying to is 5 years old..................
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Old 04-28-2013, 11:53 AM
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Quote:
Originally Posted by JagXV6 View Post
And the thread you are replying to is 5 years old..................
So why are you replying???
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Old 04-28-2013, 12:42 PM
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He's trying to get his post count up..
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Old 04-28-2013, 01:07 PM
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Hi guys,
Thanks for the information on the x-type not having a 2.7l option. But, my other facts were pretty much right on. You change timing belts, you don't touch timing chains. You'll change the timing chain when you do a engine rebuild, that's about the only time.
--regards
Jim
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  #18  
Old 04-28-2013, 01:15 PM
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Unless something goes wrong with it...
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