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Timing Belt Replacement


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#1
Erich Nussbaum_2

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Hey all,

I bought my 1999 Mazda 626 V6-LX at 105,000 miles. It now has 127,000. I have not replaced the timing belt yet and am not sure when it was originally replaced. I want to try to replace it. I have a Haynes manual for this car, but I wanted to know if anyone of you can answer a few extra questions I have about this job:

1) The Haynes Manual instructs to remove the front right wheel in order to remove a splash panel. Can I do this job without removing the splash panel, and thus without removing the front wheel?

2) I know that I will need to break the seal on my valve cover, which I am afraid will force me to replace the valve cover gasket. Can I reuse the valve cover gasket if its still in good shape, and if so, what is the best method for removing the old sealent that was used to create a seal between the gasket and the valve cover mounting surface?

3) Have any of you gone more than 60,000 miles without having a timing belt replaced? Am I a walking (or I suppose in this case driving) timebomb?

Let me know if you can answer my questions. Thanks!

#2
audiqv8

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1) The Haynes Manual instructs to remove the front right wheel in order to remove a splash panel. Can I do this job without removing the splash panel, and thus without removing the front wheel?

2) I know that I will need to break the seal on my valve cover, which I am afraid will force me to replace the valve cover gasket. Can I reuse the valve cover gasket if its still in good shape, and if so, what is the best method for removing the old sealent that was used to create a seal between the gasket and the valve cover mounting surface?

3) Have any of you gone more than 60,000 miles without having a timing belt replaced? Am I a walking (or I suppose in this case driving) timebomb?


1. No, you have to remove the right side wheel and the splash panel
2. No, you do not have to remove the valve covers.
3. Yes, the question is not if the belt will break, but when the belt will break.

Google "Leska's timing" for complete documentation on doing this job.

#3
snailman153624

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1) The Haynes Manual instructs to remove the front right wheel in order to remove a splash panel. Can I do this job without removing the splash panel, and thus without removing the front wheel?

2) I know that I will need to break the seal on my valve cover, which I am afraid will force me to replace the valve cover gasket. Can I reuse the valve cover gasket if its still in good shape, and if so, what is the best method for removing the old sealent that was used to create a seal between the gasket and the valve cover mounting surface?

3) Have any of you gone more than 60,000 miles without having a timing belt replaced? Am I a walking (or I suppose in this case driving) timebomb?


1. No, you have to remove the right side wheel and the splash panel
2. No, you do not have to remove the valve covers.
3. Yes, the question is not if the belt will break, but when the belt will break.

Google "Leska's timing" for complete documentation on doing this job.


Many people have gone over 160,000+ miles without replacing the timing belt. Good idea? I doubt it, but I recommend inspecting the belt, not necessarily replacing it.

#4
gumby06

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Haha, only 127K. It would be a waste to replace it only after 60k. I have the original timing belt and water pump in my 97 with 185K. I would just keep an eye on the belts and see how they are wearing. If they look good no need worry. Our engines are made to be non interference so if you timing belt does brake it won't tear up your engine - rather just leaving you stranded.



Hey all,

I bought my 1999 Mazda 626 V6-LX at 105,000 miles. It now has 127,000. I have not replaced the timing belt yet and am not sure when it was originally replaced. I want to try to replace it. I have a Haynes manual for this car, but I wanted to know if anyone of you can answer a few extra questions I have about this job:

1) The Haynes Manual instructs to remove the front right wheel in order to remove a splash panel. Can I do this job without removing the splash panel, and thus without removing the front wheel?

2) I know that I will need to break the seal on my valve cover, which I am afraid will force me to replace the valve cover gasket. Can I reuse the valve cover gasket if its still in good shape, and if so, what is the best method for removing the old sealent that was used to create a seal between the gasket and the valve cover mounting surface?

3) Have any of you gone more than 60,000 miles without having a timing belt replaced? Am I a walking (or I suppose in this case driving) timebomb?

Let me know if you can answer my questions. Thanks!



#5
mrslcom

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My 1998 timing belt broke at 100k miles.
I suggest to change the valve cover gaskets also because they are prone to leaks.
I also replace the tensioner, the water pump, the alternator and power steering belts, and all coolant hoses at the same time to save from doing them later.

#6
Erich Nussbaum_2

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Many people have gone over 160,000+ miles without replacing the timing belt. Good idea? I doubt it, but I recommend inspecting the belt, not necessarily replacing it.


When I inspect it, should I remove it from the engine, or can the inspection take place while still installed? What's your opinion. It seems to me that you would need to remove it to inspect it, which means you're basically doing the job of installing a new belt. Any experience with inspection over replacement? I guess if nothing else it will save me from wasting money on a new belt. What are some warning signs that my belt is about to break?

Erich

#7
Erich Nussbaum_2

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Google "Leska's timing" for complete documentation on doing this job.


So this guide at the MX-3's site will be the same instructions for our 626's?

#8
97Mazda

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Google "Leska's timing" for complete documentation on doing this job.


So this guide at the MX-3's site will be the same instructions for our 626's?


Yes it is...here's a link to the guide (with pics) that you can download:

http://pages.sbcglob...b4tn/tensioner/

#9
vlad

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I would replace the crankshaft main seal as well because it's not very expensive and the timing belt must come off to access it.




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