Mazda 6 Forums banner
1 - 14 of 14 Posts

· Registered
Joined
·
9 Posts
Discussion Starter · #1 ·
I have a 2015 Mazda 6 Touring with 110,000 miles. I had to replaced the drive belt tensioner at 70,000 miles because it was leaking. Yesterday while I was servicing my car the tech said that the belt drive tensioner and serpentine belt need to be replace because of leaking in the tensioner. I declined and will do it at another time. The first time I did the replacement I went with OEM. Should I go with another OEM or Aftermarket. I don't trust the OEM tensioner from Mazda. Also the dealer wanted $700 to replace tensioner and serpentine belt. Any suggestions.
 

· Registered
Joined
·
8,107 Posts
How about you verify it yourself first?
 

· Registered
Joined
·
8,107 Posts

· Registered
Joined
·
426 Posts
I was pleased to use an aftermarket tensioner when I replaced mine at 105k-ish miles. It was weeping, but not bad, and I expect to have no further problems with it for another ~~100k miles. I've no way to know whether it had previously been replaced. The replacement I bought was a Gates made in Canada. I didn't feel like I had too much choice at the time, however, as the Mazda ones were on extended backorder and my dealer hadn't had any for months. I was pleased with the Gates either way.

I know that if I had experienced what you have, I would think of it this way:
You've now had 2 Mazda tensioners fail within a total of ~105k miles; one at ~75k and another at ~50k. That's a poor record, IMO. I personally would not have the slightest hesitation purchasing another Canadian-made Gates, assuming it lasts as long as or longer than the Mazda one did. They're easy to get at O'Reilly or other auto parts stores, and they work well.

I'm glad you asked here, because it's easy for a person to have an anomalous experience and make a decision not otherwise supported by larger amounts of data (or in this case, just other experiences). Please let us know what you decide to do.
 

· Registered
Joined
·
2,081 Posts
I have very low miles on my '17 Mazda6, but while tensioners are being discussed can I ask folks to kindly answer my question(s) regarding what I believe is a "belt stretch" scale on the body of the tensioner? On the non-moving casting portion of the tensioner there appear to be three "strikes". Opposite, on the moving portion of the tensioner, there is what appears to be a hexagonal part... and one corner of the hex appears to indicate against the three strikes. I've taken the liberty, on my attached photo, of very subtly enhancing the three strikes and the hex corner with a graphics program, so folks can better understand what I'm referring to.

Could folks please explain the scale, and when the belt stretch becomes "rejectable" (meriting a changeout of the belt)?

I have to say I'm confused because @tickerguy , with an OEM tensioner on his '15, said the scale is visible using a light and a mirror. The scale is underneath... My "scale" is topside-viewable. I illuminate it using my Joby light. "Joby" is visible in my photo. Then again, I may be looking at the wrong item... on my '17 car.

Anyone who takes the time to answer - I thank in advance!
 

Attachments

· Registered
Joined
·
426 Posts
You know, I recall the mention of the indicator marks prior to my tensioner (and belt) change. I do not recall what it appeared to be indicating, nor even whether I decided that I saw and noted it for certain, because I planned to change it no matter what due to the hydraulic weep.

I’ve been away for work, but I’ll see if I can see anything specific on the tensioner in there now once I’m at home again.
 

· Registered
Joined
·
426 Posts
I can’t see marks on the new tensioner, although there’s an angle that could be used as a pointer or indicator of sorts.
 
1 - 14 of 14 Posts
Top