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PostPosted: Wed Feb 04, 2009 23:01 
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Abercrombie wrote:
PS: I'm a trained mechanic (4 yr apprenticeship) so I know about that kind of thing.
But a modern car would be destroyed by a timing belt failure, never mind
a road side fix.


I lurk on honestjohns web site, it appears that not all modern engines are interference engines. So just need re-timing and a new cam belt if it snaps. It is a poor way to drive a cam if you ask me, but what do I know?


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PostPosted: Thu Feb 05, 2009 00:20 
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But cheap though!

To be honest, I've never much liked belt-driven cams. I am gratified to see a number of modern manufacturers reverting to the old chain-driven systems again. I think the belt drives are quieter, cheaper to make, lighter, and have less inertia but on balance, I'd rather pay more for the car initially, knowing that I'd save in the long run by not having to fork out for periodic replacement.


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PostPosted: Thu Feb 05, 2009 00:23 
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Abercrombie wrote:
...My Cortina snapped it's cam timing belt on the South Circular.
I was dressed in suit, and the only tools I had were an industrial strength fitter's
adjustable spanner, from a steel works, and screwdriver.

I walked to a garage, ordered the part. It came in an hour. I fitted the new cam timing belt
with those two tools I had, set the timing, and got to work before lunch. My suit was still
clean, but I had to wash my hands before meeting clients.

That is how easy it was to fix cars of the late 70's.



Hmmm. Almost makes me want to go out and buy a 70s Cortina!

...almost...

...but not quite!


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PostPosted: Thu Feb 05, 2009 09:52 
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Mole wrote:

Hmmm. Almost makes me want to go out and buy a 70s Cortina!

...almost...

...but not quite!


there was a marina in mcd's carpark as i was having coffee waiting for the snow to clear a bit the other day.
very tidy.
and nice skinny tyres for the snow too.
tempted.


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PostPosted: Thu Feb 05, 2009 10:11 
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ed_m wrote:
very tidy.
and nice skinny tyres for the snow too.
tempted.


They're going to try and get 'em all of the road. Here's a letter to my MP about it:

Quote:
I was listening to the Today programme (as you do), and I overheard a
proposal that would mean an economic catastrophe for me. Perhaps that's
a bit strong, but I'll lay it out and let you decide.

Anyway, it was from a bloke from the British Association of Motor
Traders, or some group like that. They were wanting a “scrapage
subsidy”, so that people would be rewarded for getting rid of perfectly
good motors, if they would buy a new one. He wanted 2000 pounds a car,
and he was hoping that this would move the backlog of unwanted new
cars.

I'm of the opinion that the best way to move the backlog of unwanted
new cars is to have a sale. That is how merchants sell product that is
on their hands. The idea of a “scrapage subsidy” would affect us in bad
ways:

First, it would replace perfectly good vehicles with new ones. The
factories would continue to spew out CO2 at a time when we should be
doing all we can to reduce it. The traders argue that new cars are more
efficient, but this is very marginal – they are talking of cars that
are only 9 years old, which already have electronic engine management
systems, catalytic converters and which have good fuel efficiency.
Basically, it is better (within reason) to keep the 9 to 15 year old
cars going.

Second, many of us “fenners” need access to affordable vehicles. The
“scrapage subsidy” would remove the supply of ageing but decent cars,
making it dearer for poorer people to get about. The government has
already caused a fiasco with the abolition of the 10p rate, which hit
poor people hard. This “scrapage subsidy” would remove the supply of
affordable cars, making them even more hard up. I recently lost my job
in Cambridge, and I make weekly commutes to a new (but poorer paid) job
in L'pool. I need cheap cars to carry on like this, or it's not worth
it.

Third, a whole industry exists in keeping the older cars maintained.
They need exhausts, brakes, tyres, MOTs, batteries, etc. It would cause
wide scale unemployment among the multitude of small businesses that
depend on a continuous revenue stream from keeping the older cars
going. I call this “bangernomics” (although the cars are far from
“bangers” really). Many people need these older cars.

Fourth, we don't want the government to help out with “planned
obsolescence”. Cars can and should easily last longer than 9 years. I
don't want to contribute to the “throw away society”. The makers need
to be told to make more durable cars, and not told to make them last 9
years, 'coz they'll be scrapped then.

Fifth, it's a bad idea to subsidise industry anyway. Basically, the
taxpayer is maxed out with helping busted banks. If any industry should
be helped, it is the education industry, so that we can teach people to
avoid these pitfalls in the future.

Many thanks considering my views. I hear you're stepping down at the
next election, and I'm moving to L'pool sometime soon. But you've done
a great job as MP, so thanks for that as well.


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PostPosted: Thu Feb 05, 2009 10:14 
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adam.L wrote:
Abercrombie wrote:
PS: I'm a trained mechanic (4 yr apprenticeship)

it appears that not all modern engines are interference engines.


I quit being a mechanic in 1981, so I'm a bit stale now!


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PostPosted: Thu Feb 05, 2009 10:42 
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Abercrombie wrote:
I was listening to the Today programme (as you do), and I overheard a
proposal that would mean an economic catastrophe for me. Perhaps that's
a bit strong, but I'll lay it out and let you decide.

Anyway, it was from a bloke from the British Association of Motor
Traders, or some group like that. They were wanting a “scrapage
subsidy”, so that people would be rewarded for getting rid of perfectly
good motors, if they would buy a new one. He wanted 2000 pounds a car,
and he was hoping that this would move the backlog of unwanted new
cars.

I'm of the opinion that the best way to move the backlog of unwanted
new cars is to have a sale. That is how merchants sell product that is
on their hands. The idea of a “scrapage subsidy” would affect us in bad
ways:

First, it would replace perfectly good vehicles with new ones. The
factories would continue to spew out CO2 at a time when we should be
doing all we can to reduce it. The traders argue that new cars are more
efficient, but this is very marginal – they are talking of cars that
are only 9 years old, which already have electronic engine management
systems, catalytic converters and which have good fuel efficiency.
Basically, it is better (within reason) to keep the 9 to 15 year old
cars going.

Second, many of us “fenners” need access to affordable vehicles. The
“scrapage subsidy” would remove the supply of ageing but decent cars,
making it dearer for poorer people to get about. The government has
already caused a fiasco with the abolition of the 10p rate, which hit
poor people hard. This “scrapage subsidy” would remove the supply of
affordable cars, making them even more hard up. I recently lost my job
in Cambridge, and I make weekly commutes to a new (but poorer paid) job
in L'pool. I need cheap cars to carry on like this, or it's not worth
it.

Third, a whole industry exists in keeping the older cars maintained.
They need exhausts, brakes, tyres, MOTs, batteries, etc. It would cause
wide scale unemployment among the multitude of small businesses that
depend on a continuous revenue stream from keeping the older cars
going. I call this “bangernomics” (although the cars are far from
“bangers” really). Many people need these older cars.

Fourth, we don't want the government to help out with “planned
obsolescence”. Cars can and should easily last longer than 9 years. I
don't want to contribute to the “throw away society”. The makers need
to be told to make more durable cars, and not told to make them last 9
years, 'coz they'll be scrapped then.

Fifth, it's a bad idea to subsidise industry anyway. Basically, the
taxpayer is maxed out with helping busted banks. If any industry should
be helped, it is the education industry, so that we can teach people to
avoid these pitfalls in the future.

Many thanks considering my views. I hear you're stepping down at the
next election, and I'm moving to L'pool sometime soon. But you've done
a great job as MP, so thanks for that as well.


I fear that I must agree wholeheartedly with you on this occasion!

Making a scrap car worth £2k will effectively make it impossible for anyone to spend less than £2k on getting mobile. Speaking as someone who splashed out £375 on his current car, that's not exactly good news! I bought an identical one with terminal rust for £75 to cannibalise for spares (and a nice leather interior) - I guess that's never going to happen again! This government just can't seem to stop itself spouting about the need for restraint, prudence and living within our means whilst continuing to shaft the thrifty! We, (the thrifty!) are already bailing out those who chose to live beyond their means over the last few years, and now we see that our reward for "financial prudence" is to watch our savings depreciate faster than a top-of-the-range Merc on its first trip out of the showroom! As if that wasn't bad enough, us motoring "Wombles" who pick the carcasses of unwanted cars (re-use being more efficient than ANY recycling programme!) are being rewarded by having our access to such vehicles cut off (or made to cost £2k - which amounts to the same thing)!

Have you sent the letter yet? If not, I might be able to get you some numbers to put in it. (Not sure that saying you DRIVE an old vehicle from Norfolk to Liverpool was a good idea though)!


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PostPosted: Thu Feb 05, 2009 11:26 
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Mole wrote:
Have you sent the letter yet? If not, I might be able to get you some numbers to put in it. (Not sure that saying you DRIVE an old vehicle from Norfolk to Liverpool was a good idea though)!


I've sent it. But send me the info if you want - I'll send him an update. Or post it here, and I'll give him a URL.

Now we can see why the makers are raising their prices. They expect this to go through.
It's a stitch up job.


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PostPosted: Thu Feb 05, 2009 11:42 
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Quote:
Now we can see why the makers are raising their prices. They expect this to go through.
It's a stitch up job
.


Subsidised scrappage has been an EUSSR policy proposal for some time. They are just using the "Credit crunch" as an excuse to try to push it through.

Got to keep the Pan Nationals happy!

Where else will all these retired politicians get their nicy cushy (and highly remunerated) directorships from!

:x

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PostPosted: Thu Feb 05, 2009 11:52 
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Quote:
I lurk on honestjohns web site, it appears that not all modern engines are interference engines. So just need re-timing and a new cam belt if it snaps. It is a poor way to drive a cam if you ask me, but what do I know?


Most are however! (and all diesels)

Cam belts actually have many advantages over chains BUT ONLY IF THHEY ARE DONE PROPERLY!

Though a lot of manufacturers have gone back to chains, they are having problems as a consequence. Firstly they seem to have forgotten how to do it! (severe wear at quite low milages is not uncomon)

Also, modern OBD monitoring systems become easily confused (relationship betwen phasing of cam and crank sensors signals) by even small amounts of wear that in the past would only have had a slight or unoticable effect on performance. but on modern cars will put them into limp mode and make them almost undrivable.

Timing chain repairs/replacement can be very expensive!

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PostPosted: Thu Feb 05, 2009 12:09 
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Timing chains last about the same time as timing belts are SUPPOSED to last.
The belt on my ford has a supposed life of 72,000 miles, it gets replaced every 40,000 because the consequences of failure are expensive.
The belt kit is £68.00 (2 belts, 2 idlers and 2 tensioners) fitting is £100.00 (cash).
Now, while the lifespan of a timing chain is longer...that depends on service interval and oil quality....
It also depends on the other parts in the drive system...like tensioners and idlers....
The timing chain replacement interval for my m/cycle is 50,000 miles.

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The world runs on oil, period. No other substance can compete when it comes to energy density, flexibility, ease of handling, ease of transportation. If oil didn’t exist we would have to invent it.”

56 years after it was decided it was needed, the Bedford Bypass is nearing completion. The last single carriageway length of it.We have the most photogenic mayor though, always being photographed doing nothing


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PostPosted: Thu Feb 05, 2009 12:38 
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Mole wrote:
I fear that I must agree wholeheartedly with you on this occasion!


You'll get over it :D

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When I see a youth in a motor car I do d.c.brown


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PostPosted: Thu Feb 05, 2009 12:39 
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Should never have given up on push-rods; or side-valve engines come to that.

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When I see an adult on a bicycle, I do not despair for the future of the human race. H.G. Wells
When I see a youth in a motor car I do d.c.brown


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PostPosted: Thu Feb 05, 2009 13:10 
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Mole wrote:
But cheap though!

To be honest, I've never much liked belt-driven cams. I am gratified to see a number of modern manufacturers reverting to the old chain-driven systems again. I think the belt drives are quieter, cheaper to make, lighter, and have less inertia but on balance, I'd rather pay more for the car initially, knowing that I'd save in the long run by not having to fork out for periodic replacement.


The cam belt on my Citroen only needs changing every 100,000 miles. I'm not convinced that chains would last any longer. Chains usually start rattling before they break so you get some warning, unlike belts, which is one good point but overall I think belts are better. Most of the belt problems I have heard of have been caused by someone changing a belt and trying to save money by not replacing tensioners that were supposed to have been changed at the same time so the bearings fail or by not tensioning the belt correctly.


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PostPosted: Thu Feb 05, 2009 13:15 
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Or not changing the water pump as well.....

_________________
The world runs on oil, period. No other substance can compete when it comes to energy density, flexibility, ease of handling, ease of transportation. If oil didn’t exist we would have to invent it.”

56 years after it was decided it was needed, the Bedford Bypass is nearing completion. The last single carriageway length of it.We have the most photogenic mayor though, always being photographed doing nothing


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PostPosted: Thu Feb 05, 2009 15:24 
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I have particularly painful personal experience of this! Alfa aspecified a 72,000 mile replacement interval on the 156 Twinsparks (like the one we bought Mrs. Mole). I was rather disgruntled, therefore, when it shed its teeth at 57,000! I was espacially miffed as I had already decided that 72,000 seemed far too long and was going to do it when I did the 60,000 mile service! Still, at least I already had the bits - it was just a set of valves I then needed)! When I approached Alfa GB I got two fingers (for not having had it serviced at a dealership). Asked how that would make any difference given that the dealership wouldn't have touched it until 72,000, they seemed at a bit of a loss but still weren't up for giving me any money towards it! With some wry satisfaction, I notice that they then sent a bulletin to all dealers telling them to "check and replace if necessary" at 36,000 miles. That was really weasly of them as there can't have been many dealers who would have gone through the checking procedure (involving taking the belt off!) and then not put a new one on! I now hear that they have reverted to 36,000 miles as a replacement interval anyway!

Still, we've bought another one 'cause they're dirt cheap - presumably at least in part due to their reputation for trashing cam belts!

Dusty, I'm curious to know if there are any oher advantages to belts (besides the ones I mentioned). I'd love to know more about this!

I'm not sure that manufacturers have "forgotten" how to design chain driven systems that last though. Ironically, Alfa had another 2 litre 4 pot engine that had chain driven cams and would happily do 250,000 miles without anyone even looking at the chain. I wonder whether some of the "problems" are more to do with modern engines generally having more valve lift and more agressive cam profiles, plus needing much more precise control of the cam phasing on multi-cam engines (especially those with variable valve timing)?


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PostPosted: Thu Feb 05, 2009 21:58 
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ed_m wrote:
Mole wrote:

Hmmm. Almost makes me want to go out and buy a 70s Cortina!

...almost...

...but not quite!


there was a marina in mcd's carpark as i was having coffee waiting for the snow to clear a bit the other day.
very tidy.
and nice skinny tyres for the snow too.
tempted.


I saw a Marina pickup today :lol: , right tidy it was too.


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PostPosted: Fri Feb 06, 2009 01:03 
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Abercrombie wrote:
Mole wrote:
Have you sent the letter yet? If not, I might be able to get you some numbers to put in it. (Not sure that saying you DRIVE an old vehicle from Norfolk to Liverpool was a good idea though)!


I've sent it. But send me the info if you want - I'll send him an update. Or post it here, and I'll give him a URL.

Now we can see why the makers are raising their prices. They expect this to go through.
It's a stitch up job.


I have some 2007 figures from the motor industry itself here (and therefore likely to be presented in such a way as to portray the industry in the best possible light).

In 2007, the UK averages 0.6 tonnes of CO2 per new vehicle produced and distributed.

Average CO2 emissions of a new car registered in 2007 were 165g/km.

10% of a new car's CO2 comes from building it. 85% comes from using it. 5% comes from scrapping it.

In the UK, Power generation accounted for 35% of the nation's CO2 output. Tranport accounted for 22%. Of that 22%, cars accounted for 40%.

Unfortunately, the report contains statements like:

"Unfortunately, the parc’s trend towards newer vehicles
has begun to reverse in recent years as new car demand
moderated. This threatens the progress made in many
areas because, on average, new vehicles emit less CO2,
produce fewer air pollutants, are quieter and safer than
older models. However, there is an argument that longer
vehicle life postpones the production and end of life
environmental costs."


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PostPosted: Fri Feb 06, 2009 08:25 
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Quote:
n 2007, the UK averages 0.6 tonnes of CO2 per new vehicle produced and distributed.


That HAS to be complete crap!

That is only about 1000KWhr/vehicle (electricity equivilant)

or about £30 worth of electricity at commercial rates!

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PostPosted: Fri Feb 06, 2009 10:12 
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Dusty wrote:
That HAS to be complete crap!


Please find some evidence for that, Dusty. It's important.

Re: the other figures. Most reports say around 70% of the total C02 emitted by a car during it's life cycle occur during use. So around 30% occur in manufacturing and scrapping. This figure (30%) can be made MUCH lower by prolonging the life of the car. C02 emissions as a percentage would be much bigger (say 40 or even 50%) if the cars were scrapped prematurely. Essentially, premature scrapping would damage the makers own figures, and we can't allow that, can we?


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