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Paul1979T2
Joined: 01 Sep 2020
Posts: 17
Location: North Lanarkshire, United Kingdom
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 Posted: Sat Dec 26, 2020 1:47 pm Post subject: 2005 v 2007 MY Arnage |
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Anyone here with experience of both of these? I know the specification changes between them. What I would like to know is if there is a significant difference in reality between the two, in driving; economy; handling; reliability etc?
I recently drove a 2005 MY which had a new engine fitted by a dealer at 29k, which i found surprising. Was there an early reliability issue? The car although a T model felt a bit underpowered and the brakes felt quite soft. Typical? Or just lack of use or maintainance, as the car had not been serviced in 5 years.
All input would be appreciated. |
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Paul1979T2
Joined: 01 Sep 2020
Posts: 17
Location: North Lanarkshire, United Kingdom
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| Posted: Wed Dec 30, 2020 12:50 pm Post subject: Any other forum better for replies? |
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| I noticed on another post people suggesting another forum for tech answers. Is there another forum people could recommend for greater ( any) input? |
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Christopher Carnley
Joined: 16 Nov 2007
Posts: 2746
Location: Yorkshire, United Kingdom
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| Posted: Fri Jan 01, 2021 11:21 am Post subject: |
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| RROCA. |
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Paul1979T2
Joined: 01 Sep 2020
Posts: 17
Location: North Lanarkshire, United Kingdom
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| Posted: Sat Jan 02, 2021 9:35 am Post subject: |
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| Christopher Carnley wrote: | | RROCA. |
Thanks for that. Still not much on the Arnage nor on the topic I was looking for. I have checked through a few Car magazines at that time and again not much more than a recital of the tech changes.
Is there a list on any web site of all magazine reviews of B models? |
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Christopher Carnley
Joined: 16 Nov 2007
Posts: 2746
Location: Yorkshire, United Kingdom
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| Posted: Sat Jan 02, 2021 10:08 am Post subject: |
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The main problem with the engines was due to the antiquated flat tappets, (cam followers)lubrication, lubricants and servicing. The problems with this also "chewed up" the cam shafts.
In 2007, the tappets were changed to the roller type. |
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Paul1979T2
Joined: 01 Sep 2020
Posts: 17
Location: North Lanarkshire, United Kingdom
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| Posted: Sun Jan 03, 2021 3:50 pm Post subject: |
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| Christopher Carnley wrote: | The main problem with the engines was due to the antiquated flat tappets, (cam followers)lubrication, lubricants and servicing. The problems with this also "chewed up" the cam shafts.
In 2007, the tappets were changed to the roller type. |
Thanks for that which is most helpful. I was looking at a 2005my car which had its engine replacedaced under warranty by Jack Barclay in 2011. I wondered if Bentley simply replaced it with the same engine with similar design issues or if by then they supplied a new or improved version of the engine? I haven't got the engine number which I understand would be a type 45 engine if 2007MY engine.
I know If I bought the car the dealer may confirm but not sure how otherwise to check other than getting into the engine number on the block. |
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John Murch
Joined: 05 Jun 1976
Posts: 1567
Location: London, United Kingdom
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| Posted: Mon Jan 04, 2021 11:33 am Post subject: |
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I know If I bought the car the dealer may confirm but not sure how otherwise to check other than getting into the engine number on the block.[/quote]
I would hope that the dealer could give you its current engine number, or is it seriously difficult to locate? |
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bbshriver
Site Admin
Joined: 29 Jun 2021
Posts: 50
Location: North Carolina, USA
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| Posted: Fri Jul 09, 2021 7:24 pm Post subject: |
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The brakes on my 2005 Arnage R are a little "soft" compared to what I'm used to in "normal" cars. According to the dealer it's correct that under normal conditions, you should be able to use the full travel of the pedal. The cars do have a high pressure assist for more initial braking (hydroboost) in emergency manouvres.
Engine wise, the 2005/6 Arnage T is 450hp and 616lb-ft, while the 2007+ were much higher (500hp, 738lb-ft I think). I have also heard that the cam (on Arnage T) and headgasket issues were fully resolved by 2007.
As far as what the mechanical differences is in the various generations, I unfortunately have not found much. I read they went to roller tappets in 2005, but the 450hp cars continued to suffer from some sort of cam failure. |
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Paul1979T2
Joined: 01 Sep 2020
Posts: 17
Location: North Lanarkshire, United Kingdom
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| Posted: Sun Jul 11, 2021 4:25 pm Post subject: |
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| Thanks for that. I am still unclear about the engine problems in pre 2007 cars. Noticed a few advertised with previously rebuilt engines. |
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bbshriver
Site Admin
Joined: 29 Jun 2021
Posts: 50
Location: North Carolina, USA
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| Posted: Thu Aug 19, 2021 3:17 am Post subject: |
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| Paul1979T2 wrote: | | Thanks for that. I am still unclear about the engine problems in pre 2007 cars. Noticed a few advertised with previously rebuilt engines. |
I wish I could provide more information. I have read pages and pages on it and there seems to be a lot of hypotheses but no concrete conclusion. Below are a few suggestions, but again, I've not found concrete evidence which of these is most likely, or perhaps all of them are likely. We are dealing with pretty small sample sizes.
1) around this time oil formulations were changed removing a zinc additive that was essential for flat tappet engines, resulting in substantial cam wear
2) Bad metallurgy of the camshafts themselves
3) There was (around 2005?) a switch to roller tappets in response to issue 1, but now a quality issue with the tappets resulting in tappet failure and then cam wear
4) not correctly machined ancillary cam parts (bearings etc)
From the reading I've done it seems the above only apply to 450hp cars, and 400hp, or 500+hp cars don't suffer same problems. As far as WHY the 450hp cars are uniquely affected, I find no answer... I assume it has a higher lift cam.
Unrelated is the headgasket issue. Again very little concrete information available here, but apparently cause for concern in any turbocharged car pre-2007, especially post 1995. It seems this was "fixed" a few times prior to 2007 but still has some failure rate even in 2005-6 cars.
Common suggestion here is that gaskets get permanently compressed over time which relaxes the clamping force of the head-to-block joint. Once everything is fully warmed up, the block and heads have expanded a bit, improving the clamping force and reducing the change of failure, so best to warm the cars up, and drive gently for some time. I usually take it easy for the first 10 min or so, after a ~5min warm-up in the driveway. To be fair, this is a condition that can happen in ALL engines, especially in turbocharged applications, and having a bit of mechanical sympathy will reward you regardless of car. The difference is it's not a $20,000 repair in "normal" cars so nobody thinks much of it. |
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Paul1979T2
Joined: 01 Sep 2020
Posts: 17
Location: North Lanarkshire, United Kingdom
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| Posted: Sat Aug 21, 2021 12:22 am Post subject: |
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Thanks for that.
As you say there appears to be clear answer |
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JRnage
Joined: 23 Aug 2021
Posts: 11
Location: Texas, USA
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| Posted: Wed Sep 15, 2021 1:35 am Post subject: |
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Paul, if you haven't decided on which Arnage to go with, I can tell you my 2005 T is fantastic. I have had it only a month, and driven only a few hundred miles, so I can't attest to reliability. J can say the power and how it drives is wonderful. My car had 59,000 miles. My alarm went off and I couldn't stop it. Cure was replace a battery. (Check said one was bad.)
2nd issue fault code said Cooling Fan - and it was right. Replaced melted 40 amp fuse and it's working but it's pulling 37 amps. Pros recommend replacing the fan.
Finally, Auto Ride Height warning beeps and us displayed on dash. I topped off fluid and that didn't help. I think I need dealer's scan and advice on this.
I've heard good things about the '07, so if you can get one. That's excellent!
Please let me know how it goes. Best of luck, sir.
John in Texas. |
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