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Old 02-08-2009, 06:02 AM   #1
phenoyz
 
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yaris timing belt

what is the timing belt of a yaris is it CHAIN or RUBBER?
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Old 02-08-2009, 06:22 AM   #2
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Its a chain,you'll never have to worry about it.
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Old 02-08-2009, 06:23 AM   #3
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I'm pretty sure its a chain
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Old 02-08-2009, 08:45 AM   #4
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Quote:
Originally Posted by phenoyz View Post
what is the timing belt of a yaris is it CHAIN or RUBBER?
Chain.

http://www.etimago.com/yaris/repairmanual/

Engine Mechanical - Caution: big PDF file. Valve clearance adjustment techniques start on page ten, which clearly shows the timing chain.

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Old 02-08-2009, 09:14 AM   #5
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Its a chain,you'll never have to worry about it.
wrong it still needs to be maintained , tightened every 100k.
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Old 02-08-2009, 10:07 AM   #6
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There is an automatic timing chain tensioner which maintains the proper tension (i.e. no tightening required). You should not have to touch it. It should be pratically "maintenance free" for the lifetime of the engine. Sure, there is a maximum chain stretch measurement that can be verified at defined intervals, but there should be other problems with the car by the time the chain needs replacing (at least in areas where salt is used as a de-icer on road surfaces in the winter).

From the Toyota website:
Quote:
Originally Posted by Toyota.com FAQ
If your vehicle is equipped with a timing chain rather than a timing belt, there is no prescribed replacement interval.....For Timing Chain and Gears, there are no prescribed replacement intervals; these components should be replaced as needed.
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Old 02-08-2009, 02:05 PM   #7
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Seeing as how trini_per4mance (member) has not touched his in 305,000 miles, I'd say it should go the life of the car with no change or maintenance.

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Old 02-08-2009, 02:09 PM   #8
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Seeing as how trini_per4mance (member) has not touched his in 305,000 miles, I'd say it should go the life of the car with no change or maintenance.

however his 300k+ miles are 95% or more from highway freeway driving. for regular drivers like ourselves, wouldn't there be a difference? just my guess
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Old 02-08-2009, 02:32 PM   #9
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the automatic tensioner is there to maintain optimum tension of the chain however this still has to be checked. My dealership told me that it is good to verify and reset the tensioner every 100k. Maintenance free applies to people who keep their car until 100k.

As for triniperformance , like darkmoon said it is 95% highway driven therefore the stress of constant stop and go is not present thus the chain doesn't need to be adjusted at the specified interval.
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Old 02-08-2009, 06:46 PM   #10
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Ha, Toyota got us on the other end: the valves are non-adjustable, non-hydraulic, and the whole top end of the engine (cam box) will have to be torn down periodically to adjust any valve that is out of the clearance spec. I'll put up with some clacking rather than go through this $700- service befor 100K miles. BTW, timing chain tensioner are historically very troublesome. I like belts! Gee, why does a Lexus LS430 V8 have timing BELTS? Give me a couple strong belts!
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Old 02-09-2009, 12:31 AM   #11
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Quote:
Originally Posted by darkmoon87 View Post
however his 300k+ miles are 95% or more from highway freeway driving. for regular drivers like ourselves, wouldn't there be a difference? just my guess
Quote:
Originally Posted by PK198105 View Post
the automatic tensioner is there to maintain optimum tension of the chain however this still has to be checked. My dealership told me that it is good to verify and reset the tensioner every 100k. Maintenance free applies to people who keep their car until 100k.

As for triniperformance , like darkmoon said it is 95% highway driven therefore the stress of constant stop and go is not present thus the chain doesn't need to be adjusted at the specified interval.
actually guys, 65% of my driving is highway. the other 35% is city, stop and go.
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Old 02-09-2009, 01:39 AM   #12
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Quote:
Originally Posted by TheSilkySmooth View Post
... BTW, timing chain tensioner are historically very troublesome. I like belts! Gee, why does a Lexus LS430 V8 have timing BELTS? Give me a couple strong belts!
Not in Toyota's... And why would you prefer an expensive belt service over nothing required?

A lot of toyota engines, as well as most imports, used to use belts. Not anymore... Even the new 4.0 V6 (4-runner and FJ) and the new 5.7 V8 (Tundra) now use chains. In fact almost every new engine Toyota has uses a chain. Hell, even our 2006 Civic 1.8 has a chain...

And that's belt, not belts...

CHAINS FTW
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Old 02-09-2009, 01:44 AM   #13
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http://www.toyota.com/help/faqs/serv...ing_chain.html

Model Year Engine Belt/Chain/Gear

4Runner 1990-2000 4 Cylinder Chain
1990-2002 V6 Belt
2003-2008 V6 Chain
2003-2008 V8 Belt

Avalon 1995-2003 V6 Belt
2004-2008 V6 Chain

Camry 1990-2001 All Belt
2002-2008 4 Cylinder Chain
1990-2006 V6 Belt
2007-2009 V6 Chain
Camry Hybrid 2007-2009 4 Cylinder Chain

Celica 1990-1999 4 Cylinder Belt
2000-2005 4 Cylinder Chain

Corolla 1990-1997 4 Cylinder Belt
1998-2009 4 Cylinder Chain

Cressida 1990-1992 L6 Belt

ECHO 2000-2005 4 Cylinder Chain

FJ Cruiser 2007-2008 V6 Chain

Highlander 2001-2007 4 Cylinder Chain
2001-2007 V6 Belt
2008 V6 Chain
Highlander Hybrid 2006-2008 V6 Belt

Land Cruiser 1990-1992 L6 Gear
1993-1997 L6 Chain
1998-2007 V8 Belt
2008 V8 Chain

MR2 1990-1995 4 Cylinder Belt
MR2 Spyder 2000-2005 4 Cylinder Chain

Matrix 2003-2009 4 Cylinder Chain

Paseo 1992-1997 4 Cylinder Belt

Previa 1991-1997 4 Cylinder Chain

Prius 2001-2008 4 Cylinder Chain

RAV4 1996-2000 4 Cylinder Belt
2001-2008 4 Cylinder Chain
2006-2008 V6 Chain

Sequoia 2001-2007 V8 Belt
2008 4.7 V8 Belt
2008 5.7 V8 Chain

Sienna 1998-2006 V6 Belt
2007-2008 V6 Chain

Solara 1999-2001 4 Cylinder Belt
2002-2008 4 Cylinder Chain
1999-2008 V6 Belt

Supra 1990-1998 L6 Belt

T100 1993-1998 4 Cylinder Chain
1993-1998 V6 Belt

Tacoma 1995-2008 4 Cylinder Chain
1995-2004 V6 Belt
2005-2008 V6 Chain

Tercel 1990-1998 4 Cylinder Belt

Truck 1990-1995 4 Cylinder Chain
1990-1995 V6 Belt

Tundra 2000-2004 V6 Belt
2005-2008 V6 Chain
2000-2008 4.7 V8 Belt
2007-2008 5.7 V8 Chain

Yaris 2007-2008 4 Cylinder Chain


For Timing Belts, please reference our "Timing Belt Recommendations" FAQ (Frequently Asked Question) to determine the maintenance interval recommendations.

For Timing Chain and Gears, there are no prescribed replacement intervals; these components should be replaced as needed.
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Old 02-09-2009, 11:42 AM   #14
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Quote:
Originally Posted by Kal-El View Post
Seeing as how trini_per4mance (member) has not touched his in 305,000 miles, I'd say it should go the life of the car with no change or maintenance.

A Sample of one is not statistically relevant. I have 2 toyotas with chains - one only went 67K and the tesioner crapped out and the other is at 17K and still going (on REAL synthetic oil) Lesson learned with oil quality So with my sample size of 2 we are at a 50% failure rate
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Old 02-09-2009, 11:50 AM   #15
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Originally Posted by PetersRedYaris View Post
Not in Toyota's... And why would you prefer an expensive belt service over nothing required?

And that's belt, not belts...
Oh sorry I'm an old subaru guy - we have 2 belts; one for each 2 cyl bank. I made the assumption that the toyota 4.7L v8 had 2 belts also.

My question to toyota designers, especially with the thinner oils utilised today wiith low EP adds, why no roller followers on the cam tappets (ala Mitsubishi) and why "non- adjustable without a extensive tear down? Gee I could easily adjust my 2.3L chevy vega inveted bucket tappet with a hex key and only remove the valve cover

Last edited by TheSilkySmooth; 02-09-2009 at 11:51 AM. Reason: schpellink air or
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