2006 TL with 36k miles - need new timing belt
11-18-2014, 06:34 AM
#41
>2004-The only deviation to the "4" symbol (approx. 105,000miles):
If you drive regularly in very high temperatures (over 110°F, 43°C), or in very low temperatures (under-20°F, 29°C), replace every 60,000 mile (U.S.)/100,000 km (Canada)
Just an FYI-Same requirement through the 2014 model year.
2003 Owner's Manual has a severe driving condition that differs from 2004:
U.S. Owners Follow the Severe Conditions Maintenance Schedule if you
drive your car under one or more of the following conditions:
Driving less than 5 miles (8 km) per trip or, in freezing temperatures, driving less than 10 miles (16 km) per trip. Driving in
extremely hot [over 90°F (32°C)] conditions. Extensive idling or long periods of stop-and-go driving, such as a taxi or a commecial delivery vehicle.
Trailer towing, driving with a roof rack, or driving in mountainous conditions. Driving on muddy, dusty, or de-iced roads.
Follow the Maintenance Schedule for Severe Conditions.
If driven as above, other replacement item intervals change, but the Timing Belt and Water Pump is to be replaced at the normal interval 105,000 miles.
In 2003 they also have a Special Service which is the Severe Service in 2004:
Replace this belt at 60,000 miles (U.S.) or 100,000 km (Canada) if you
regularly drive your car in one or more of these conditions:
In very high temperatures (over 110°F, 43°C).
In very low temperatures (under 20°F, 29°C
A lot of words, but "4" 105,000 miles is still the mileage to do the change.
11-18-2014, 08:39 AM
#42
wOw this thread is getting pretty "special".
The most stress on a timing belt is definitely NOT at startup. The timing belt has one job that requires any significant amount of force. That is to open the intake & exhaust valves. When this event begins, these valves are ALWAYS STATIONARY NO MATTER THE ENGINE SPEED. The belt's job is to force the valve to open. Now do you think that is a more difficult job at zero rpm with a slow rolling camshaft or at an engine speed of 7000 rpm where the cam is turning 3500rpm and an entire piston stroke takes about half a second?
At those speeds, the entire valve opening event must take less than a .25 seconds. This is where your timing competent stress is located.
The most stress on a timing belt is definitely NOT at startup. The timing belt has one job that requires any significant amount of force. That is to open the intake & exhaust valves. When this event begins, these valves are ALWAYS STATIONARY NO MATTER THE ENGINE SPEED. The belt's job is to force the valve to open. Now do you think that is a more difficult job at zero rpm with a slow rolling camshaft or at an engine speed of 7000 rpm where the cam is turning 3500rpm and an entire piston stroke takes about half a second?
At those speeds, the entire valve opening event must take less than a .25 seconds. This is where your timing competent stress is located.
Last edited by 94eg!; 11-18-2014 at 08:41 AM.
11-18-2014, 03:32 PM
#43
wow this thread is getting pretty "special".
The most stress on a timing belt is definitely not at startup. The timing belt has one job that requires any significant amount of force. That is to open the intake & exhaust valves. When this event begins, these valves are always stationary no matter the engine speed. The belt's job is to force the valve to open. Now do you think that is a more difficult job at zero rpm with a slow rolling camshaft or at an engine speed of 7000 rpm where the cam is turning 3500rpm and an entire piston stroke takes about half a second?
At those speeds, the entire valve opening event must take less than a .25 seconds. This is where your timing competent stress is located.
The most stress on a timing belt is definitely not at startup. The timing belt has one job that requires any significant amount of force. That is to open the intake & exhaust valves. When this event begins, these valves are always stationary no matter the engine speed. The belt's job is to force the valve to open. Now do you think that is a more difficult job at zero rpm with a slow rolling camshaft or at an engine speed of 7000 rpm where the cam is turning 3500rpm and an entire piston stroke takes about half a second?
At those speeds, the entire valve opening event must take less than a .25 seconds. This is where your timing competent stress is located.
11-20-2014, 04:33 AM
#45
wOw this thread is getting pretty "special".
The most stress on a timing belt is definitely NOT at startup. The timing belt has one job that requires any significant amount of force. That is to open the intake & exhaust valves. When this event begins, these valves are ALWAYS STATIONARY NO MATTER THE ENGINE SPEED. The belt's job is to force the valve to open. Now do you think that is a more difficult job at zero rpm with a slow rolling camshaft or at an engine speed of 7000 rpm where the cam is turning 3500rpm and an entire piston stroke takes about half a second?
At those speeds, the entire valve opening event must take less than a .25 seconds. This is where your timing competent stress is located.
The most stress on a timing belt is definitely NOT at startup. The timing belt has one job that requires any significant amount of force. That is to open the intake & exhaust valves. When this event begins, these valves are ALWAYS STATIONARY NO MATTER THE ENGINE SPEED. The belt's job is to force the valve to open. Now do you think that is a more difficult job at zero rpm with a slow rolling camshaft or at an engine speed of 7000 rpm where the cam is turning 3500rpm and an entire piston stroke takes about half a second?
At those speeds, the entire valve opening event must take less than a .25 seconds. This is where your timing competent stress is located.
11-20-2014, 08:59 AM
#46
Instructor
I have to agree with 94eg! with the fact that the timing belt is under the most stress at higher rpms where it is forcing the valves to open at a faster rate. YouEmMaiMai's theory only works if you take the valves and springs out of the equation. If the springs and valves didn't exist, then sure, startup would result in the most stress since you are forcing the camshaft to accelerate from a standstill. But once the springs and valves are introduced into the equation, the force it takes to compress the springs faster and faster greatly overshadows the amount of force it takes to accelerate a camshaft from a standstill to 1k rpm.
Edit: You have to realize that the valves/springs/rocker arms are not a mass that is in constant movement. The faster the camshaft spins, the faster it must force the spring to it's closed position (Force = Mass * Acceleration).
Edit: You have to realize that the valves/springs/rocker arms are not a mass that is in constant movement. The faster the camshaft spins, the faster it must force the spring to it's closed position (Force = Mass * Acceleration).
Last edited by SgtSir440; 11-20-2014 at 09:06 AM.
11-20-2014, 10:07 AM
#47
^Bingo.
Proof.......timing belts don't break at startup.
BTW: Nothing is ever really stationary. If it was, it would cease to exist (learned that one in science class). Objects are always in motion. It's all about their mass and how quickly you accelerate it. If anyone really believes a starter motor can generate more torque/power than a Honda 3.2L performance V6, they are sadly mistaken.
Proof.......timing belts don't break at startup.
BTW: Nothing is ever really stationary. If it was, it would cease to exist (learned that one in science class). Objects are always in motion. It's all about their mass and how quickly you accelerate it. If anyone really believes a starter motor can generate more torque/power than a Honda 3.2L performance V6, they are sadly mistaken.
Last edited by 94eg!; 11-20-2014 at 10:13 AM.
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11-20-2014, 03:35 PM
#52
Timing Belts and Chains - When it all Goes Wrong
When it comes down to it, you really don't want the valves and pistons to meet each other. They can happily share the same space, even multiple times in the same second, but never, ever at the same time.
Timing belts break most often at start up and shut down of the engine, because that is often when the most tension is on the belt.
You can read the entire article:
Timing Belt Vs. Timing Chain | Engine Timing Belts & Chains Replacement | Car Timing Chains & Belts Guide At 1A Auto
When it comes down to it, you really don't want the valves and pistons to meet each other. They can happily share the same space, even multiple times in the same second, but never, ever at the same time.
Timing belts break most often at start up and shut down of the engine, because that is often when the most tension is on the belt.
You can read the entire article:
Timing Belt Vs. Timing Chain | Engine Timing Belts & Chains Replacement | Car Timing Chains & Belts Guide At 1A Auto
The following users liked this post:
YeuEmMaiMai (11-20-2014)
11-20-2014, 05:12 PM
#53
Instructor
Timing Belts and Chains - When it all Goes Wrong
When it comes down to it, you really don't want the valves and pistons to meet each other. They can happily share the same space, even multiple times in the same second, but never, ever at the same time.
Timing belts break most often at start up and shut down of the engine, because that is often when the most tension is on the belt.
You can read the entire article:
Timing Belt Vs. Timing Chain | Engine Timing Belts & Chains Replacement | Car Timing Chains & Belts Guide At 1A Auto
When it comes down to it, you really don't want the valves and pistons to meet each other. They can happily share the same space, even multiple times in the same second, but never, ever at the same time.
Timing belts break most often at start up and shut down of the engine, because that is often when the most tension is on the belt.
You can read the entire article:
Timing Belt Vs. Timing Chain | Engine Timing Belts & Chains Replacement | Car Timing Chains & Belts Guide At 1A Auto
11-20-2014, 05:51 PM
#54
and you're just plain stupid if you cannot understand what I explained, maybe you should join your friend in said science class.
we'll just start right here
http://www.physicsclassroom.com/Clas...laws/U2L1b.cfm
science > you
we'll just start right here
http://www.physicsclassroom.com/Clas...laws/U2L1b.cfm
science > you
Last edited by YeuEmMaiMai; 11-20-2014 at 05:59 PM.
11-21-2014, 11:28 AM
#55
Team Owner
Easy now. We can all be friends here!! :gheyhug:
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