Anyone knows if 2023 has timing belt or timing chain?
2023 Odysse - timing belt or timing chain?
San Miguel
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There are some known chain-eaters, yep. Ford's 3.5l Ecoboost Gen 1 is well-known for this as well. But, generally speaking, chain drives are maintenance free for 150-200k, depending on maintenance/oil change/etc.
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Chains or belts with simple tensioners are usually troublefree (still need to change belt periodically). The problem is many chains today use hydraulic tensioners or have wear pads or tensioner adjustment that can wear out and lead to problems. I'd say today it's about a draw in terms of life and basically an engineering decision as noted earlier.
In the Driving 4 Answers video, he makes some interesting points, not all of course is gospel, but note the point he makes at time 20:18 minutes about changing oil.
In the Driving 4 Answers video, he makes some interesting points, not all of course is gospel, but note the point he makes at time 20:18 minutes about changing oil.
Same here. Our 2012 CRV has a chain. We're at 105,000 km and all is well.
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You can do it yourself for around $250. Not that hard. Easier than a valve job.
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@Cmack
On some GM engines due to the timing chain noise, they actually put plastic on the cam gear to help quiet down the noise. Problem with that was the plastic would become brittle and start braking off from the gear. At first many mechanics could not figure what was wrong as you could not hear the chain/gear being noisy, however, the engine was running rough and most mechanics thought it was timing or carburetor problems. It took several months before GM mechanics found that by watching the timing and or firing on a engine SUN oscilloscope, that the timing was erratic. So next was replace distributor and plugs/plug wires/distributor cap. No help there. So the tore out the front end Fan shroud/fan/harmonic balancer/water pump/timing cover. Lo and behold they saw the bad plastic over metal gear. A lot of people opted for new timing chain and steel cam gear, they also had to drop the oil pan to remove all the broken off plastic pieces. How do I know all this? My 1968 Chevelle had this problem, plus many other of my customers had the rpair work done around 1974. No GM at fault for free replacements either.
I would still prefer a timing chain - stanless steel!
On some GM engines due to the timing chain noise, they actually put plastic on the cam gear to help quiet down the noise. Problem with that was the plastic would become brittle and start braking off from the gear. At first many mechanics could not figure what was wrong as you could not hear the chain/gear being noisy, however, the engine was running rough and most mechanics thought it was timing or carburetor problems. It took several months before GM mechanics found that by watching the timing and or firing on a engine SUN oscilloscope, that the timing was erratic. So next was replace distributor and plugs/plug wires/distributor cap. No help there. So the tore out the front end Fan shroud/fan/harmonic balancer/water pump/timing cover. Lo and behold they saw the bad plastic over metal gear. A lot of people opted for new timing chain and steel cam gear, they also had to drop the oil pan to remove all the broken off plastic pieces. How do I know all this? My 1968 Chevelle had this problem, plus many other of my customers had the rpair work done around 1974. No GM at fault for free replacements either.
I would still prefer a timing chain - stanless steel!
Why?
Read post #11
Tell us “Why not?”
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my two cents here:
Personally, i prefer belt than Chain, handsdown.
Why? The major reason is as the chain is sitting inside the engine under timing cover with all others moving parts lubricated by oil; but timing belts are commonly setup outside, dry. this is a key factor in long term maintainance.
For sure, Chain definitly will last way longer than a rubberbased belt. However, Chain drive engine won't last forever, or maintain-free in term of timing, very often, we don't see chain failure like broken or jumping (even it streched a little), we see more cases due to other parts within the timing mechanism failed, such as Hydro tensioner, chain guides, sliders, which had way shorter lifespan than a chain, to fix these, you might need spend more $ and time to open the engine up to expose the timing side by removing the timing cover, most of the cases, the engine need to be taken out from engine bay, this mission is not friendly to any DIYers.
with a belt drive engine, we can regularlly check and even replace it without too much hassles.
Personally, i prefer belt than Chain, handsdown.
Why? The major reason is as the chain is sitting inside the engine under timing cover with all others moving parts lubricated by oil; but timing belts are commonly setup outside, dry. this is a key factor in long term maintainance.
For sure, Chain definitly will last way longer than a rubberbased belt. However, Chain drive engine won't last forever, or maintain-free in term of timing, very often, we don't see chain failure like broken or jumping (even it streched a little), we see more cases due to other parts within the timing mechanism failed, such as Hydro tensioner, chain guides, sliders, which had way shorter lifespan than a chain, to fix these, you might need spend more $ and time to open the engine up to expose the timing side by removing the timing cover, most of the cases, the engine need to be taken out from engine bay, this mission is not friendly to any DIYers.
with a belt drive engine, we can regularlly check and even replace it without too much hassles.
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Here we go again on belt vs chain... Belts through many applications from fan (furnace blown squirrel cage fans, belt fans (large fans, not your little circulation fans, tractor driven attachments, such as balers-mowers-snow blowers..., combines.
These are but a few applications that uses belts to drive almost anything. The bad things about belts is that they wear or fray or stretch out, if cog style the cogs break off, the belt can jump over notches (bad for timing items), dry rot, snap open. They are definitely higher maintenance, and I disagree about being easier to replace...
Belts, cost less than chain drives, simpler for engineering designs, can help for misalignment of pulleys or blocks.
Now a word from design engineers on belts (and this is not me), they have a loss of power application and every time they start they stretch but normally return to shape, I think they called this a lag in operation. A really bad design in being used for CVT as in almost Auto made, and yes even in the the ones that are bathed in oil...
Chain drives give a higher performance in horsepower and torque, wear way less than belts and keep a better timing relationship. The only other item for better for timing is direct gear to gear. Most problems with gear to gear is the cost and area needed for this application.
I am not wild about the noise a chain drive can make compared to a belt drive.
To each there own, comparisons could be boots to athletic shoes. One is lighter, the other heavier and on and on.
These are but a few applications that uses belts to drive almost anything. The bad things about belts is that they wear or fray or stretch out, if cog style the cogs break off, the belt can jump over notches (bad for timing items), dry rot, snap open. They are definitely higher maintenance, and I disagree about being easier to replace...
Belts, cost less than chain drives, simpler for engineering designs, can help for misalignment of pulleys or blocks.
Now a word from design engineers on belts (and this is not me), they have a loss of power application and every time they start they stretch but normally return to shape, I think they called this a lag in operation. A really bad design in being used for CVT as in almost Auto made, and yes even in the the ones that are bathed in oil...
Chain drives give a higher performance in horsepower and torque, wear way less than belts and keep a better timing relationship. The only other item for better for timing is direct gear to gear. Most problems with gear to gear is the cost and area needed for this application.
I am not wild about the noise a chain drive can make compared to a belt drive.
To each there own, comparisons could be boots to athletic shoes. One is lighter, the other heavier and on and on.
Regardless of whether you are on the "belt" team of the "chain" team, I suspect Honda will start using chains more in the future on their new designs. The J35 basic layout has been around a long time, and they may have not wanted to invest in an all-new 3.5L engine given that some people think IC engines will be obsolete soon. The K and R engine series are newer than the J, and they all have chains as far as I know.
With a chain, you only need one oil seal through the front cover, and the engine design can be shorter (theoretically). Less part, less material = lower engine cost. Less oil seals=less leak paths=less warranty dollars.
Just my opinion as a seasoned diesel engine design/development engineer.
With a chain, you only need one oil seal through the front cover, and the engine design can be shorter (theoretically). Less part, less material = lower engine cost. Less oil seals=less leak paths=less warranty dollars.
Just my opinion as a seasoned diesel engine design/development engineer.
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