its also guaranteed work for mechanics. it took the consumers time to catch on. now they know and the belts are going bye byes as the consumers avoid them.

Timingbelt or chainlist

CS 4X29,5X50 is a Standard Compression Springs - Wire Dia. (WD) options are 4, Internal Dia. (ID) options are 29.5, Free Length (FL) options are 50, Material options are EN 10270-1-SM

I’ve heard of manufactures changing a design because it saved something like $1.00 per car. Which would add up a lot right? Why not pass that $1.00 over to the buyer and sell a car thats built right? It bothers me.

What’s lost here is the fact that cars and their engines last a whole lot longer today than ever before. Complaining about a pretty big dollar maintenance obligation at nearly 100,000 miles is kind of silly. In my driving lifetime cars needed valve jobs, ring jobs, and major overhauls well before 100,000 miles. I guess it’s reasonable to hope for an eternal life for your car, but it’s completely unrealistic. Sure, getting the belt replaced is a big bite, and so is replacing a steering rack or ball joints, but transportation just does cost a lot and everyone wants the most for the least. You can avoid all this by getting a new car every 4 or 5 years, but if you want to spend less and conserve resources you fix what you have.

So its settled. Belts are stupid. As I suspected. Funny thing is if you were in the market for a new car and wanted some engine specs that were less problematic - like lets say a timing chain, and a normal oil filter (not the element type with a PLASTIC screw on cap over it…ask me why I hate this design…) the sales person would have zero idea as to those specs. The paints shiny isnt that enough?

Thank you Wes. @db4690 I was semi joking saying theyre stupid, however, lets agree theyre clearly less than ideal. You seem to justify them because an owners manual gives a time/mileage period in which the belt must be changed.

Cam chain or beltreddit

There are fewer and fewer belts now since the buying public is fed up with their failures and having to replace them periodically. The best maintenance is maintenance that does not need to be done.

it took 35 yrs for my timing sprocket to wear out on my 75 ford, the chain was still good as the sprocket would have been had it not been aluminium and had been steel , as the replacement sprocket was. of course a steelsprocket would have worn the chain more, so perhaps the aluminium sprocket was a good design.

It can’t be some global conspiracy, involving all of the manufacturers. Because some of them never even used timing belts

Some claim chains are noisier. They aren’t. I’ve owned, driven, and worked on countless cars over the last 45 years, with both configurations, and it’s impossible to tell by the sound in the driver’s seat whether an engine has a belt or a chain. Anybody that tells you they can tell whether a car has a belt or a chain just from the sound is, IMHO, full of it.

By the way, I picked the V6, because that is a typical engine on a mid sized family car, or your average famly minivan or suv

Cars are designed for the assembly line, not for ease of repair. Things that are awkward when repairing and very easy to work with on the assembly line. Saving assembly time results in being able to offer the vehicle at a lower cost, and with the reliability of todays vehicles, it is a good trade off for the customer as well. The customer being the new car buyer, not those who buy the car second hand.

Timingbeltvs timingchainpros and cons

Having owned 10 cars with timing chains since 1958!, I’ve only replaced one timing chain and gear set, on a 1984 Chevy small block V8. Not because it broke, buit because it got noisy and would have worn out shortly. Cost was about $250 for a heavy duty set.

Why do car companies use timing belts combined with the design being an interference engine? That’s just asking for problems.

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well I constantly see threads involving timing belts and their problems and expense and the fact that people don t like to have a very expensive replacement being part of regular maintenance.

Forgive me for saying this, and I mean no offense . . . but is it possible you had an opinion, and you just wanted the other regulars to also have your opinion?

Timingchain or beltchecker

Manufacturing cost. Period. All other reasons given are just hyperbole. Yes, timing chains are good as long as they don’t break. So are belts.

All of this begs the question, why was the camshaft moved over the head causing the need for all of this re-engineering?

Timingbeltvs timingchaincost

Newer belts use a urethane rubber that lasts much longer, but still eventually cracks and allows the fibers to delaminate. If they used a silicone rubber, the belts would last the life of the engine easily.

if you don t change your brake pads, you have to get a new rotor, if you don t change the timing belt the engine is shot and most people get rid of the car rather than rebuild the engine.

While it may be the case that most of the other regulars despise timing belts and think they’re stupid . . . I really don’t want to presume anything, though . . . I for one have absolutely no problems with timing belts. I’ve changed a few of them myself. I’ve bought cars, knowing they had timing belts, and I’ve gladly changed them on time, because I recognize it is scheduled maintenance."

Timingbeltreplacement cost

The chains used on an OHC engine are not the heavy duty, multi row toothed chains used on the old iron block V8’s of yore. They are more like bicycle or motor cycle chains. Some are double row and will last forever it seems like, but more and more, they are going to lighter duty single row chains. We shall see how these hold up.

Let’s say the timing belt on your honda fails, the damage is severe and expensive, and you decide to scrap it and buy another car

The belts could also be easier to replace. I had a 79 Dodge Colt with the 1.4 Mitsubishi engine, changing the timing belt was a 20 minute repair. The later Mitsubishi 1.5 engine in my 90 Dodge Colt was much more difficult to change, but no where near as hard as the belt on a Honda.

From the manufacturers viewpoint, in the late 70’s when timing belts started to be used, most new car buyers only kept their car 4 years, and the timing belt lasted 4 years so the manufacturers customer, the one they made money off of was not affected by the cheaper belt.

My 1950 Cadillac has a basic short chain up front and normal cam in the block. Apparently this tank got in the low 20’s highway mpg. In 1950. This could lead off into a whole other tangent, but really what it comes down to in my mind - is cost. Mileages reached the 40’s in the early 90’s. Somehow we haven’t made progress? I dont buy it.

So far in my short car owning life compared to some of you, I want an engine with a timing chain, metal intake manifold, and regular oil filter. Metal intake manifolds seem to be non existent on modern engines.

The manufacturers did this to themselves. They started making belts using natural rubber as the matrix and natural rubber does not age well. Once the rubber starts to deteriorate, the reinforcing fibers become delaminated and the belt breaks.

It’s FAR more expensive to replace 3 chains, guides, rails, etc. on a typical transverse V6 engine, versus replacing a timing belt, idler, tensioner, etc., on a transverse V6

many people can t afford to pay to have it done, so they just hope the replacement is recommended and not necessary as they have learned that car dealers and makers are less than honest about their products anyway. they are not unwilling to do the belt change, just unable physically or financially or both.

Timingbelt chainreplacement cost

they just think its stupid to have such a major repair/ replacement as part of regular maintenance. it seems like like the manufacturer wants the thing to fail and know that people will neglect them. they want to sell new cars, not make the old ones last.

timing belts cause problems for the average customer. they don t understand the logic behind them and assume that the mechanic is trying to oversell them and that such an expensive maint. item could not be purposely designed.

Even a relative, a seasoned industry maintenance expert, did not know that the belt on his Hyundai Santa Fe had to be changed regularly, as he had always driven vehicles with timing chains.

Are timing chains good just as long as they don’t break? I just don’t know why a company would engineer a highly important internal component to have limited life.

Timingchainlifespan

I’m still with Wes on this. “They” is the car manufacturers. It’s not in their best interest to make a car that just keeps going and going and going. I find a lot of times not only does something not last as long as it should, but the replacement is difficult. They engineer under the confines of saving cost down to the penny, and among a team of engineers assigned to different components. Sometimes it seems like fitting each teams design under the hood to be cohesive, and accessible for standard maintenance to be an afterthought.

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How about I sell you an engine that has magic composite rings that reduce engine noise, and theyre only good for 105K miles and after that its on you. I’ll write it in the manual that they have to be changed by 105K or else you can damage the engine. The manual says it! My hands are clean.

What’s the difference between an $800 timing belt job at 100,000 miles or a $2500 timing chain job at 150,000 or whenever? The timing belt job is predictable and more affordable.

It almost seems like the most effective method to car ownership is to find a model you like, with a good engine design, and keep it. Rebuild it and keep going.

“it seems like like the manufacturer wants the thing to fail and know that people will neglect them. they want to sell new cars, not make the old ones last.”

It’s technology that now allows us to use chains on OHC engines where we used to need to use belts. Belts are simple. Chains need guides, tensioners, and lubrication to work. And your car may have 1,2,3, or 4 chains.

As people started keeping their cars longer, the manufacturers had to make the belts last longer so they upgraded the materials. Some also got their dealerships to offer a special price on the timing belt package as Honda did so it didn’t seem so bad to those customers that kept their cars past the belt life,

Let’s say this is 1971. Engines are now being designed with the camshaft way up on top of the engine instead of inside the engine block right above the crank where it should be. How are we going to get the cam to turn? Should be use an inexpensive and easy to service timing belt? Or should we use a chain that will have to be 4 times longer than any other timing chain and hope that the metallurgy, plastics, and lubrication of the day are strong enough to make the thing last until the warranty period is up.

Now, new car buyers are keeping their cars an average of 11 years. This may drop in the next survey but the recession was the reason that people were holding on to their cars longer. They could have gone to silicone rubber belts but those are really expensive. If the chain will last through the 11 years and costs less than a belt, then that is what they are going to do.

I will say cars last longer today in general and thats great. Theres just aspects like timing belts where I plain do not see an advantage.