TIming Belt or Chain

H

hayk

New member
Hi Guys, is V6 has timing belt or it is timing chain? I searched the forun, but could not find.
Thanks
 
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Thans!

Thank you guys. The car is so great. This is my first SUV and I am going to take it to the mountains of Armenia this spring/summer.
 
I recently bought a 2004 4Runner SR5 V6 and the dealer told me that the V6 timing chain requires no maintenance. Is this true? How does a timing chain differ from a timing belt?
 
Zinarac said:
I recently bought a 2004 4Runner SR5 V6 and the dealer told me that the V6 timing chain requires no maintenance. Is this true? How does a timing chain differ from a timing belt?
Click to expand...

True, no maint.

A timing belt is like a toothed accesory drive belt. (It's sometimes called a fan belt.) It's very similar to the drive belt on a Harley motorcycle. The rubber ages and succumbs to the rigors of wear and heat cycles. It resides under plastic cover(s) on the front of the engine. The covers protect it pretty well from the environment but the cover and it's seals are not perfect.

A timing chain is like a bicycle chain (usually double row though). It's inside the engine and benefits from being protected from the elements and a constant flow of engine oil from the engines' internal lubrication system. In theory it could wear or fail but in all likelihood that would occur long after the rest of the vehicle has quit.


:cheers:
 
Last edited:
CJ3Flyr said:
True, no maint.

A timing belt is like a toothed accesory drive belt. (It's sometimes called a fan belt.) It's very similar to the drive belt on a Harley motorcycle. The rubber ages and succumbs to the rigors of wear and heat cycles. It resides under plastic cover(s) on the front of the engine. The covers protect it pretty well from the environment but the cover and it's seals are not perfect.

A timing chain is like a bicycle chain (usually double row though). It's inside the engine and benefits from being protected from the elements and a constant flow of engine oil from the engines' internal lubrication system. In theory it could wear or fail but in all likelihood that would occur long after the rest of the vehicle has quit.


:cheers:
Click to expand...

Okay, thanks for confirming this. I don't always believe what the dealer tells me considering they are trying to make a sale.
 
chayos00 said:
Speaking of this matter, is this engine (V6) a non interference or an interference engine.
Click to expand...

I don't know. It's kinda irrelevant as the V6 has a good chain, not a belt. In the 'old days' some American V8's would break a timing chain or strip the teeth off of the nylon gear. The likelihood of it breaking on this engine is pretty slim. The V8 is an interference engine that's why it's so important to do the belt at 90k.

:cheers:
 
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chayos00 said:
Speaking of this matter, is this engine (V6) a non interference or an interference engine.
Click to expand...

Non interference. If you have the V8 the belt is important maintanance since it's then an interference design.
 
CJ3Flyr said:
I don't know. It's kinda irrelevant as the V6 has a good chain, not a belt. In the 'old days' some American V8's would break a timing chain or strip the teeth off of the nylon gear. The likelihood of it breaking on this engine is pretty slim. The V8 is an interference engine that's why it's so important to do the belt at 90k.

:cheers:
Click to expand...
'

so it is dead set right at 90K regradless of normal or severe maintenance/usage?
 
Benjamin Choi said:
'

so it is dead set right at 90K regradless of normal or severe maintenance/usage?
Click to expand...

It is recommended at 90k. You could most likely go longer without any problems, but you might as well get it replaced at 90k since it will eventually need to be replaced. Recommended maintenance is always set with a saftey factor and Toyotas seem to be able to handle some abuse.:)
 
Last edited:
CJ3Flyr said:
True, no maint.

A timing belt is like a toothed accesory drive belt. (It's sometimes called a fan belt.) It's very similar to the drive belt on a Harley motorcycle. The rubber ages and succumbs to the rigors of wear and heat cycles. It resides under plastic cover(s) on the front of the engine. The covers protect it pretty well from the environment but the cover and it's seals are not perfect.

A timing chain is like a bicycle chain (usually double row though). It's inside the engine and benefits from being protected from the elements and a constant flow of engine oil from the engines' internal lubrication system. In theory it could wear or fail but in all likelihood that would occur long after the rest of the vehicle has quit.



:cheers:
Click to expand...

The timing belt or chain (aka drive belt or chain) rotates the cam shaft and usually also runs the water pump.

The fan belt is separate and would need to be replaced, as would the alternator belt.
 
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chayos00 said:
Speaking of this matter, is this engine (V6) a non interference or an interference engine.
Click to expand...
I am going to dissagree with the other post saying it is a non-interference engine. I have not seen anything about the V6 being an interference or non-interference engine, but my feeling is that it is a variable timing and if that chain breaks especially at high revs, I wouldn't bet the valves would be OK.

Also, chains have been known to break, I have a really old Previa and I have heard that the chains have been known to break on the 2.4 engine. Of course it is something like 300,000 miles on these cars before something like this happens.
 
peter78 said:
I am going to dissagree with the other post saying it is a non-interference engine. I have not seen anything about the V6 being an interference or non-interference engine, but my feeling is that it is a variable timing and if that chain breaks especially at high revs, I wouldn't bet the valves would be OK.

Also, chains have been known to break, I have a really old Previa and I have heard that the chains have been known to break on the 2.4 engine. Of course it is something like 300,000 miles on these cars before something like this happens.
Click to expand...

:iagree: I haven't seen anything to indicate the V6 would be non-interference. I can't see how it would be. I'm wrong about lots of stuff though. On the second point :iagree:. I guess my statement "long after the rest of the vehicle quit" doesn't carry quite as much validity in the world of Toyota:D :bigok:
 
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CJ3Flyr said:
True, no maint.

A timing belt is like a toothed accesory drive belt. (It's sometimes called a fan belt.) It's very similar to the drive belt on a Harley motorcycle. The rubber ages and succumbs to the rigors of wear and heat cycles. It resides under plastic cover(s) on the front of the engine. The covers protect it pretty well from the environment but the cover and it's seals are not perfect.

A timing chain is like a bicycle chain (usually double row though). It's inside the engine and benefits from being protected from the elements and a constant flow of engine oil from the engines' internal lubrication system. In theory it could wear or fail but in all likelihood that would occur long after the rest of the vehicle has quit.


:cheers:
Click to expand...
Hello new to board ....making sure I have correct ..looking to buy 04 Toyota 4runner v-6 so acccording to board v-6 = timing chain v-8 = timing belt..correct? PLEASE email me [email protected] ..and let me know thanks
 
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