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Old 02-16-2013, 12:51 AM   #1 (permalink)
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Arrow 2005 Mazda 6 Timing Belt

Hi,

Can anyone recommend a good mechanic in the S. Florida area to replace the timing belt on my car? What is the approximate cost you are paying for this work?

Any information would be greatly appreciated.
Thank you
Daniel
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Old 02-16-2013, 08:52 AM   #2 (permalink)
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Default Re: 2005 Mazda 6 Timing Belt

These have timing chains. Unless you are having real issues there is no need to replace it.

tapatalking.. err wait.
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Old 02-17-2013, 02:34 PM   #3 (permalink)
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what happens if the chain does break, will that ruin the engine or is it designed not to affect the engine?
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Old 02-17-2013, 02:56 PM   #4 (permalink)
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Default Re: 2005 Mazda 6 Timing Belt

It will hit the valves. I've never heard of chain breaking on these engines though.

tapatalking.. err wait.
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Old 02-17-2013, 04:23 PM   #5 (permalink)
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These are non-interference engines, so theoretical nothing. You start walking!

Seriously - unless you have something going wrong - no need to replace the chain. It should easily go 150,000 miles.

EDIT: TALK ABOUT UNCERTAIN!!!! I can find no absolute truth which is it is; As best I read the people that bent valves did so under OVER-REV conditions which does not make them interference. SOMEONE POST SOME ACTUAL FACTS!!!
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Last edited by Final Impact; 02-17-2013 at 04:59 PM.
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Old 02-17-2013, 06:39 PM   #6 (permalink)
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Default Re: 2005 Mazda 6 Timing Belt

Yeah I've read a lot of weird stuff too. The last few that I've rebuilt have all touched the valves.

tapatalking.. err wait.
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Old 02-20-2013, 12:46 PM   #7 (permalink)
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The valves do kiss the pistons if the timing is wrong or there is no timing due to a busted chain! I have seen it on my replacement engine!

Tomi
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Old 12-21-2013, 02:31 PM   #8 (permalink)
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Default Damage to the valves and pistons may occur.

Found this in a Mazdawg training manual....
Mind you this same manual SPECIFICALLY CALLS OUT THE 3.0L S AJ engine as being an interference engine and valves will be damaged if timing is off. IT DOES NOT say "interference" in the 2.0 - 2.3L section of the same manual. That could be as simple as people who wrote the different sections thus the wording is not alike. Read on if you will...

2.3L I4: Excerpts from said manual...
Never turn the engine over using a socket on the crankshaft bolt. Turning the crankshaft bolt counter-clockwise will loosen the bolt and engine damage will result. Follow the Workshop Manual service procedure (01-10-24) for camshaft/crankshaft timing whenever the crankshaft bolt is loosened.
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CAUTION: The crankshaft, camshaft and crankshaft sprockets, and crankshaft pulley are friction-fit components. Loosening any of these components requires retiming of the camshafts and crankshaft. Failure to properly retime the engine will result in severe engine damage.
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CAUTION: Failure to position the #1 piston at top dead center (TDC) may result in engine damage. Only turn the engine in the normal direction of rotation.
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Timing chain procedures must be followed exactly or damage to the valves and pistons can occur.

There is this: "CAUTION: Do not rotate the camshafts. Damage to the valves and pistons may occur." From: 2.0L-2.3L Timing Chain R&I released in 2005


TAKE AWAY; Ford designed the 3.0 AJ and Mazda designed the 2.0 - 2.3. As business partners Ford plastered their name all over the 2.3. This could be the simple reason why the 2.3L section does not include the words "interference". Yes, you can go look up "CAM BELT" replacement on these engines and it says NON-INTERFERENCE, but these don't have have belts so why believe a belt company.
Sadly, I'm still confused. However, this is the closest to fact I've seen but I'm open to proof from any direction. Obviously loosening or turning any major bolt like the cam or crank bolts CCW could screw your motor; i.e. damage cam tensioner, cam guides, cause friction fit to components to loosen, cause valve components to be out time with crank, engine not to run. This material says damage will result.

3.0L AJ V6:
On the following pages we will examine the 3.0L timing chain removal and installation procedure. Paying close attention to the steps in this procedure will ensure that you are able properly remove and install the timing drive components and set camshaft timing. Since this is an interference engine, failure to follow the proper procedure will result in severe engine damage.

TAG: 2.3L I4 Duratec Ford 2.3 Mazda 2.3, Timing, interference, valve piston, damage
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2005 Mazda 6 Timing Belt-2.3interference-copy.jpg  
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Old 01-15-2014, 12:18 AM   #9 (permalink)
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$bump$
JJD952 - Timing
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Old 01-15-2014, 08:04 AM   #10 (permalink)
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Sounds like a few folks in here might be good candidates for purchasing my 2005 Mazda6 factory service manual…
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