Why do cars have cambelts? - stunorthants
Is it me or is this a cynical exercise to allow dealers the opportunity to charge the earth?

My 1987 Mazda 323 doesn't have a cambelt, the result of which means that even a full service ( oil/filter, coolant, plugs, brake fluid, air filter ) only comes to about £120 if that.

My question is, does having a cambelt really improve the car or is it a money making scheme by manufacturers that they build in when they dont have to?
On that note, I read somewhere that they are now reverting back to timing chains again on the newest cars...
Why do cars have cambelts? - Galad
Consider yourself fortunate then - I recently had my 2002 Mazda 323TD in for a full main dealer service (no unusual parts replaced)including a cambelt change and I got just a penny change from £600! At least it's not due for a similar service for another 54k which gives me time to save up enough to pay for it .....
Why do cars have cambelts? - type's'
IMO it is just a cynical ploy by the makers to cut costs in production and make more money out of you when you need to have the car serviced with the use of OEM parts.
I appreciate I will probably be be criticised for VW bashing - but they do leave themselves wide open for it when the can't even make cam belt engines that will last past 40K miles because of the initial cost cutting by using plastic componenets to secure the belt in the first instance.
Thats why I ditched VW in favour of a chain cam VTEC with my last car purchase.
Why do cars have cambelts? - L'escargot
My question is, does having a cambelt really improve the car


It makes it quieter.
or is it a money making scheme by manufacturers that they
build in when they dont have to?


That's a cynical view. Car manufacturers continually strive to improve their products, and by and large they succeed.
--
L\'escargot.
Why do cars have cambelts? - Sprice
Its not cynical, probably some truth in it. Cambelts are no quieter if the chaincam engine has been adequately maintained.
Why do cars have cambelts? - type's'
>>That's a cynical view. Car manufacturers continually strive to improve their products, and by and large they succeed.<<

I actually disagree with this statement for some car makers. Cost cutting and increasing profit is the main driver with some car makers - thats why they platform share and use cheaper parts if they can. Just look at Mercedes as a recent example.
Why do cars have cambelts? - L'escargot
Cost
cutting and increasing profit is the main driver with some car
makers


Whether they've cut costs or not is something most motorists won't know and won't care about. All I know is that every car I've ever bought has been better in all respects than the previous; better performance, better reliability and more goodies. How the manufacturer achieves this is their affair. As long as I keep getting the latest technology and the latest goodies I'm happy.
--
L\'escargot.
Why do cars have cambelts? - ziggy

>>How the
manufacturer achieves this is their affair. As long as I keep
getting the latest technology and the latest goodies I'm >>happy.


Me too. But I am always curious how results are achieved. And I am suspicous that manufacturers know what counts is the OTR cost in a fiercely competitive market so it suits them to have other costs hidden. Like everything: airline tickets/hire cars etc. the headline rate can be cheap but you still might find yourself short-changed in the long run. Ryanair don't even want to have to pay the cost to help disabled people to get on to their air-craft...

I remember after the Zebrugge Ferry disaster it was calculated how much it would add to price of a ticket to make a more fail-safe system: answer was very, very small.
Why do cars have cambelts? - stunorthants
Well my dad had a 1989 Mazda 323 with the larger 1500cc engine which did have a cambelt and my 323 is infact more refined by some margin so thats a poor arguement if thats really the reason.

I dont think it is cynical at all - making cars is about making money and ANYONE who thinks that cars are designed out of the goodness of some peoples corporate hearts has no idea how business works.

Big business is purely about net profit attained within the confines of the law ( most of the time ). The reason car makers make moral improvements in their cars is because they dont want a negative reflection on their product which would affect sales, not because they care about you the individual.

If you couple that with the fact that its not often easy to make money from car making such is the competition in the market place, you should seriously consider why cars are designed how they are. They have a built in shelf life for goodness sake - how cynical is that?

Why do cars have cambelts? - L'escargot
They have a built in shelf life
for goodness sake - how cynical is that?


Could you explain to me what you mean by a "built in shelf life"?
--
L\'escargot.
Why do cars have cambelts? - PhilW
"make more money out of you when you need to have the car serviced with the use of OEM parts."
Maybe I'm missing the point but how do cambelts do that? For a start, the cambelt won't (I think) be made by the car manufacturer, they only cost a small amount (£30ish?) and (at least on the Citroens I have owned) replaced every 72k to 100k -or 6 to 10 years of "average" motoring. Even if you replace water pump etc each time they are also probably made by third parties so the profit does not go to the manufacturer.
I bet the average motorist spends more on oil, filters, wipers and even windscreen wash than on cambelts. Trouble with cambelts is that you get a £300 (??) bill all at once, but for the average 12k a year motorist the actual cost of the belt (not labour etc) is about 10p a week!

--
Phil
Why do cars have cambelts? - Stuartli
My 1800 Vauxhall Magnum of the 1970s had a neoprene cambelt.

It packed up at 13.5k miles (fortunately no damage done to the engine) and its replacement was still going strong many thousands of miles down the line later.

That could be due to the fact that a relative, a fully trained mechanic, replaced the cambelt with some assistance from me.

Another relative, also a car mechanic, use to work with him at weekends keeping friends and family's cars in tip top order. At least everyone knew the work was done properly...:-)
- - - - - - - - - - - - - - - - - - - - -
What\'s for you won\'t pass you by
Why do cars have cambelts? - type's'
>>If you couple that with the fact that its not often easy to make money from car making <<

I'm not so sure about that - money making in the car industry is difficult if your business model is wrong and you produce something people do not want - for example profits at:-
Toyota - £6Bn for 2005
Honda - £2.5Bn for 2005
BMW - £2.7Bn and two thirds of BM's are made in Germany - some of the most expensive labour rates in the world.
IMO these car makers give people what they want/expect and there profits are forecast to increase for 2006/7.

>>"make more money out of you when you need to have the car serviced with the use of OEM parts."
Maybe I'm missing the point but how do cambelts do that? For a start, the cambelt won't (I think) be made by the car manufacturer, they only cost a small amount (£30ish?) <<
I was making a generic point in that with a belt they will sell more than chains and the mark up will be huge. Coupled with the fact that when a dealer wants a franchise - they themselves will look at a the bigger business picture and (here I go again VW bashing) for instanec - if you can sell a desirable car that is more expensive than most that people will pay for and make loads of money servicing and replacing cambelts etc then you will choose to have a VW dealership for example.
Why do cars have cambelts? - Stuartli
>>make loads of money serving and replacing cambelts etc.....then you will choose to have a VW dealership for example.>>

That's a remarkably bizarre piece of business logic...:-)
- - - - - - - - - - - - - - - - - - - - -
What\'s for you won\'t pass you by
Why do cars have cambelts? - PhilW
"with a belt they will sell more than chains and the mark up will be huge"
Even if the dealer got them for nowt and sold them for £30 they are hardly making massive profits if they sell one for each car every 6 or so years. I wonder also how many of us actually get a cambelt changed on a 72 or 100k car at a main dealer? I certainly never have.
Are you really suggesting that someone looking for a dealership will go for VW because they will make a lot of money from selling/replacing cambelts? or
People went for Rover dealerships because they had regular work replacing headgaskets?
On the other hand I could see people going for (say) Toyota dealerships because the cars are so reliable that each year they need a quick check over, oil and filter change "and that will be £200 sir (including new wipers at £100 plus labour!!)"
Must remember - open a business selling rubbish products that continually need repairs, establish a good customer base with people coming back to buy more and more of these rubbish products - huge profits from repairs, spare parts and all the new customers as the business builds up on the back of word of mouth recommendations for the rubbish products (but excellent spares and repairs)
--
Phil
Why do cars have cambelts? - Roberson
I think it is mainly to bring the costs down during manufacturing (and increase profit). I don't think it's got anything to do with making money during scheduled maintenance. 9 times out of 10, the dealer will only perform one belt change on a car before the owner/new owner takes it to a non-franchised dealer and thus they make no money from it. Many private car buyers probably give up at the main dealer long before the cam belt is due a change anyway.

There wouldn't be as much of a problem with 'belts if they?re put on engines who's installation makes it easy to change. My Polo for example, you can change it in under an hour, so what the point in a chain? Even well maintained chains can go noisy with age and they're probably three times more complicated to change. Chains should be a must if the timing end of the engine is inaccessible.
Why do cars have cambelts? - type's'
>>Must remember - open a business selling rubbish products that continually need repairs, establish a good customer base with people coming back to buy more and more of these rubbish products - huge profits from repairs, spare parts and all the new customers as the business builds up on the back of word of mouth recommendations for the rubbish products (but excellent spares and repairs)<<

As I say it works for VW (and others) in this country.

Otherwise please explain why the top 10 selling vehicles in this country never feature in the top 10 customer satisafction survey scores ?

Why do cars have cambelts? - type's'
>>make loads of money serving and replacing cambelts etc.....then you will choose to have a VW dealership for example.>>

That's a remarkably bizarre piece of business logic...:-)



I was being a little sarcastic with my opinion of VW dealers - mainly from the continued list of complaints I hear from friends and family who continually are having warranty work completd (when they can the dealer to agree) or repairs at some of the most expensive labour rates in the local area.

Also you have to remember that VW UK have gone all out for the Company car market in the last few years with huge service intervals (that are as expensive as normal intervals elsewhere) followed by big bills when the poor paying punter picks up a so called 3 year old fully serviced vehicle. My logic was mainly dictated by comments on this forum.
Why do cars have cambelts? - L'escargot
You can't stop progress, and I for one wouldn't want to. If ever anyone says to me "They don't make cars like they used to." my reply is "Thank goodness for that."
--
L\'escargot.
Why do cars have cambelts? - type's'
Off course that is correct - cars have to improve to remain competitive (apologies stunorthants because we are moving away from your initial question - so tell me to stop if you want).

My argument is the manner in which makers try and improve. VW have tried to move themselves upmarket - mainly as a result of the threat from MB and BMW moving down market with the A class etc. IMO they did this by leveraging technologies that were initially designed for Audi - the gamble paid of at first because it did not dent Audi's character much, although now people are asking why buy an Audi when a Skoda is practically the same car. As a result if they can afford it they buy BMW instead of Audi - market figures reveal this.
The thing is VW could not afford to use all the technology at it's true cost or they would price themslevs out of the market - so this was done at A cost. In doing so they set peoples expectations, charged a premium but then let them down. If you review any of the auto studies on the internet it will demonstrate that in terms of cost of ownership versus PRODUCT QUALITY, VW sits high (cost) in a mass market segment with makers such as Nissan and Subaru and Cheverolet for product quality. Where as companies such as Honda, Toyota and to an extent Volvo produce higher Product Quality vehicles with lower overall cost of ownership.
(No doubt people will disagree with thsi as I was recently reading another article that discussed how 'pre-programmed' people are when it comes to car brands.)


NB: - these are facts derived from auto and marketing studies on the internet explained in my terms to simplfy
Why do cars have cambelts? - Stuartli
>>for example.>>

It wouldn't have mattered which manufacturer you named - the logic would never, ever have impressed your bank manager...:-)
- - - - - - - - - - - - - - - - - - - - -
What\'s for you won\'t pass you by
Why do cars have cambelts? - stunorthants
I think if the figures of privately bought new cars as opposed to all new car orders ( including fleet purchases ) were compared, I think the sales figures would reflect the better cars.

Ford and Vauxhall only sell so many cars because they sell to hire car firms etc at huge discounts.

Oh and on my shelf life comments earlier - If you bought 4 cars in 1990, say a Ford Sierra, Renault 21, Mercedes 190 and a Toyota Carina, did 250,000 miles in each car, which cars would you expect to still be running original engines, gearboxes and most other main components?

Id bet first on the Mercedes, second on the Toyota. And yet when new they were all about the same size with similar specs ( if not price ).
The reason is that neither the Ford nor the Renault were expected to last that long, whereas the Merc and Toyota were engineered to last far longer.
Mercedes may have lost their way recently ( thankyou America! ) but back then, if it needed 3 bolts, Mercedes used 5 and it shows by how many 190's you can still find for sale in good working order, whereas, try find a high mileage Renault 21 that you would want to rely on!

Toyota is proof if any that you can make durable and reliable cars and still make a profit, so there is no reason that Ford or Vauxhall cant, they just wont because thats not how they do business.
Why do cars have cambelts? - L'escargot
Oh and on my shelf life comments earlier - If you
bought 4 cars in 1990, say a Ford Sierra, Renault 21,
Mercedes 190 and a Toyota Carina, did 250,000 miles in each
car, which cars would you expect to still be running original
engines, gearboxes and most other main components?


How many people want a car to last 250,000 miles? And how many people want a 16 year old car? I want to keep up with modern styling, performance, technology and goodies. The rate of progress of car design is such that I wouldn't want to be driving around now in a 1990s car. Compared with a 2006 car a 1990 car is old hat in every respect. As an example, in a 2006 car you can corner at speeds that would have you off the road in a 1990 car.
--
L\'escargot.
Why do cars have cambelts? - type's'
Safety is a good example of this as well.
I remeber watching 5th gear (I know - I was bored) and they crashed a new design espace into a 15 or 20 year old one. The results were disturbing if you were in the older a car.
Hot knife through butter was the term used I think.
Why do cars have cambelts? - Xileno {P}
Rover were developing a camless version of the K Series, using computer controlled valves IIRC.

The rest is history but the Chinese may pick up and run with it.
Why do cars have cambelts? - colino
Cambelts were introduced to be quieter than chains, but more importantly, as run of the mill engines became more powerful, to more precisely, and for longer, maintain timing over the stretchy chains. Clearly work has been done with chains of late and manufacturers are returning to the longer lived chain system.
Why do cars have cambelts? - Hamsafar
Some cars don't mind if the cambelt snaps, as the valves don't reach the pistons.
why can't they all be like that (or at least the petrols)? No engineer worth his salt would allow such a common a single point of failure to destroy an engine unless it's part of his brief.
Why do cars have cambelts? - Lud
The independent round the corner was rebuilding an Alfa 156 V6 engine the other day.

He said the owner had left the belts in too long and one had snapped, lunching a bank of cylinders. He spoke highly of Alfa 4-cylinder engines (chain cam) which he said were bulletproof. He was doing the job for £2.5k, more or less the value of the car. I imagine an Alfa main dealer would charge more.
Why do cars have cambelts? - tr7v8
He's not the brightest independant then!
V6 engines are much rarer than the 4 for cambelt failure. £2.5K is a rip off it should be much cheaper than that.
4 pot Alfa's haven't had cam chains since early 1996 when they went 16V.
If people think cam chains don't fail thn they are living in cloud cuckoo land. I've done quite a few over the years & they are major amounts of work, fair more than a cam belt. Ask someone with a V6 Sharalaxy, they break cam chains between 70 & 100K miles & cost massive amounts of money to fix.
Given a belt costs £20-£30 & costs around £150 to change then over the 2-3 years it takes to cover 40K or so then the aggregated costs are minimal.
Why do cars have cambelts? - Lud
He's not the brightest independant then!

£2.5K is a rip off it should be much cheaper than
that.
4 pot Alfa's haven't had cam chains since early 1996 when
they went 16V.


I don't know if he's the brightest, but he makes sense to me, does a very good job and never ever rips anyone off.

An engine rebuild costs what it costs - depends on what new parts are needed and how much they cost, surely? But perhaps I misunderstood him on the subject of 4 cylinder Alfa engines. I didn't know they had gone over to belts with the advent of 4-valve head. So perhaps he just meant they are easier to change, therefore more likely to be changed.

Chains fail of course, but they tend to get quite noisy first, giving warning that they need changing. Belts just go without warning.
Why do cars have cambelts? - Lud
Some cars don't mind if the cambelt snaps, as the valves
don't reach the pistons.
why can't they all be like that (or at least the
petrols)? No engineer worth his salt would allow such a common
a single point of failure to destroy an engine unless it's
part of his brief.


Something to do with very high compression, deep-breathing efficient modern engines with shaped pistons and four inclined valves, surely?

Bring back side-valves that can never touch pistons!

And with them, bring back 1.5 litre cars that put out 32 BHP and do 18 mpg.
Why do cars have cambelts? - richy
When are we going to get pnumatically operated valves as seen in F1 for the last 20 years? I mean it only took about 7-8 years before semi-automatic gearboxes started catching on in road cars.
Why do cars have cambelts? - Sofa Spud
Some early OHC cars, like Bentleys, had a camshaft driven by a vertical shaft and 45 degree bevel gears.
Why do cars have cambelts? - Lud
And a fine clamour they made.
Why do cars have cambelts? - Pete M
If you think bevel gear drive to the cams is noisy, have a listen to an engine with a spur gear train to the cams. I think some Honda V4 motorcycle engines have this, and some racing engines. Is the V8 Cosworth one of these?
They really are noisy, with a high pitched thrashing sound that is hard to damp out.
Why do cars have cambelts? - Lud
Early Porsche flat-four competition engines had spur gears I believe, and were noisy in this way as well as very expensive to repair.
Why do cars have cambelts? - L'escargot
No engineer worth his salt would allow such a common
a single point of failure to destroy an engine unless it's
part of his brief.


You're surely not suggesting that some engines are deliberately designed so that belt failure results in damage to other parts? Failure of many things in a car (and in most types of mechanical designs) will result in secondary associated failures.

Pistons touching valves following belt failure is purely the result of having large valve openings in the pursuit of improved engine running characteristics. The benefit to the many that don't fail far outweighs the detriment to the few that do fail.
--
L\'escargot.
Why do cars have cambelts? - Altea Ego
When are we going to get pnumatically operated valves as seen in F1 for the last 20 years?

Never I hope. Whats the single most common failures of F1 cars?

Hydraulics and pnumatics.
------------------------------
TourVanMan TM < Ex RF >
Why do cars have cambelts? - Falkirk Bairn
My complaint over cam belt changes is that it involves considerable expense on the 2 cars I have.

Both are "engine out" change belt, put engine back - the belts were in the order of £50 (from memory) the in-out part cost £300 on 1 and £200 on the other.

In moving to cam belts could some thought not have been put into reducing the cost of cambelt changes. In some cars a cambelt change is a few nuts and bolts and 30 minutes labour.

Mind you £300 engine in/out seems a bargain compared to some VWs where the bumper comes off to change a headlamp bulb @a cost of £100+.
Why do cars have cambelts? - Sofa Spud
I know it's vital that cambelts need to be fitted properly but it strikes me that manufacturers could do more to make the changing thereof much easier, with an easy locking tool so anyone capable of renewing a set of brake pads could do a cambelt with confidence.