4.0 V6 Chain or Timing Belt ? - Toyota Nation Forum : Toyota Car and Truck Forums
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#1 Old 07-04-2009, 10:01 PM
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4.0 V6 Chain or Timing Belt ?

Does the 4.0 V6 have a timing chain or does it have a belt? Thanks, Dave
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#2 Old 07-04-2009, 10:17 PM
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05 and up taco has a chain
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#3 Old 07-05-2009, 12:03 AM
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One of the MANY reasons why I bought the V6 was because of the chain.... Belts make me nervous....
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#4 Old 07-05-2009, 01:37 AM
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Originally Posted by Ice|Burn View Post
One of the MANY reasons why I bought the V6 was because of the chain.... Belts make me nervous....
So true, chains are supposed to last longer than the belts.
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#5 Old 07-05-2009, 01:45 AM
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Originally Posted by RuneRules View Post
So true, chains are supposed to last longer than the belts.
Chains DO last longer than belts...there is no "supposed to." If it doesn't last longer then a belt then there was a manufacturing defect in the chain itself. It's metal versus rubber, of course metal will last longer. Chains also can't jump timing and should in most cases last the entire life of the engine without the need to be replaced, they also don't stretch much if at all.

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#6 Old 07-05-2009, 02:11 AM
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Correct me if i'm wrong but aren't most OEM's now switching to belts for this very reason?

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#7 Old 07-05-2009, 04:46 AM
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Originally Posted by HighTQCummins View Post
Correct me if i'm wrong but aren't most OEM's now switching to belts for this very reason?
Nope, belts are just cheaper to produce.
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#8 Old 07-05-2009, 10:27 AM
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belts also bring the customer back at 90-100k for a $700+ replacement service...

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#9 Old 07-05-2009, 10:57 AM
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Originally Posted by Ice|Burn View Post
One of the MANY reasons why I bought the V6 was because of the chain.... Belts make me nervous....
The I4 has a chain too.

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#10 Old 07-05-2009, 10:58 AM
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Originally Posted by Sony View Post
Chains DO last longer than belts...there is no "supposed to." If it doesn't last longer then a belt then there was a manufacturing defect in the chain itself. It's metal versus rubber, of course metal will last longer. Chains also can't jump timing and should in most cases last the entire life of the engine without the need to be replaced, they also don't stretch much if at all.
Huh? Sorry but you're wrong on most points. Chains do wear, and as they wear they stretch. All of them. This is why they have oil pressure actuated chain tensioners to compensate for that stretch. They also vary in quality. There are single, double and triple roller chains. This will determine when the chain needs to be replaced, usually between 60,000 and 120,000 miles (belts are pretty much spent after 60,000 miles, so yeah, chains do outlast belts.) Timing chains can jump timing. It happens when the oil feed to the chain tensioner becomes clogged and the tensioner ceases to work allowing the timing chain to become slack, although the chain is likely to snap when it happens, they do jump time. Happens all the time to abused motors.

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#11 Old 07-05-2009, 03:41 PM
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Originally Posted by worthywads View Post
The I4 has a chain too.
I've got a 2003 Camry I4 with a chain and have had a 1996 Corolla with a belt that I had changed every 60,000 miles. Just hoping also that the new 2.7 liter engine for the Highland gets in the 2010 Tacoma, because I want a I4 with auto and 4wd.
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#12 Old 07-05-2009, 05:36 PM
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Originally Posted by bob857 View Post
Huh? Sorry but you're wrong on most points. Chains do wear, and as they wear they stretch. All of them. This is why they have oil pressure actuated chain tensioners to compensate for that stretch. They also vary in quality. There are single, double and triple roller chains. This will determine when the chain needs to be replaced, usually between 60,000 and 120,000 miles (belts are pretty much spent after 60,000 miles, so yeah, chains do outlast belts.) Timing chains can jump timing. It happens when the oil feed to the chain tensioner becomes clogged and the tensioner ceases to work allowing the timing chain to become slack, although the chain is likely to snap when it happens, they do jump time. Happens all the time to abused motors.
Gotta disagree with you there on your mileage numbers. Depending on manufacturer, belts are rated for between 60k and 100k miles. Chains are alot more durable and usually are 120k miles or longer. Typical chain replacement on 22re motors was near 200k miles after the chain guide broke and started sawing through the timing cover. Chains generally last the life of the motor except in certain circumstances (Nissan and their VQ40 motors, 80s Ford V8s with plastic teeth on the timing gears) Not saying the chain is invincible but they are alot stronger than you give them credit for.
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#13 Old 07-05-2009, 06:27 PM
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Originally Posted by WCTacoTech View Post
Gotta disagree with you there on your mileage numbers. Depending on manufacturer, belts are rated for between 60k and 100k miles. Chains are alot more durable and usually are 120k miles or longer. Typical chain replacement on 22re motors was near 200k miles after the chain guide broke and started sawing through the timing cover. Chains generally last the life of the motor except in certain circumstances (Nissan and their VQ40 motors, 80s Ford V8s with plastic teeth on the timing gears) Not saying the chain is invincible but they are alot stronger than you give them credit for.
Gotta disagree. Seen it with my own eyes. Fixed them with my own hands. Now if you willing to trash the motor, fine go for the absurd mileage ("Typical chain replacement on 22re motors was near 200k miles after the chain guide broke and started sawing through the timing cover.") or you can be responsible and change the chain out at 120,000 miles - before it wears through anything. The only reason not to is the $$$.
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#14 Old 07-05-2009, 07:36 PM
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Originally Posted by bob857 View Post
Gotta disagree. Seen it with my own eyes. Fixed them with my own hands. Now if you willing to trash the motor, fine go for the absurd mileage ("Typical chain replacement on 22re motors was near 200k miles after the chain guide broke and started sawing through the timing cover.") or you can be responsible and change the chain out at 120,000 miles - before it wears through anything. The only reason not to is the $$$.
That's if you wish to do a chain R&R as preventative maintenance. You could tell when the guide broke and it was time to change out the chain and that usually was around 200k miles. It rarely trashed the motor, just required replacing the chain, tensioners, timing cover and an oil change and coolant fill. Granted it is a good idea to try and avoid that damage but 120k is really premature.
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#15 Old 07-06-2009, 07:53 AM
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I have an '06 with an '05 build date. I've looked all over my motor and never saw a chain. Do I just have a belt then?

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