Sign in to follow this  
Followers 0
linda

97 626 Making Tapping Noise Near Timing Belt

13 posts in this topic

I have a 97 mazda 626 2.5 engine.. i am new at this so please be kind lol.. i took it to the mechanic today because for some reason it is making a tapping noise . They said they thought it was coming from the tension on the timing belt . I had timing belt replaced 2 yrs ago .. said it might have trash in it and that to replace it all would be 425.00. it would take 3 hrs to fix ,so i opted for change oil to synthetic oil and add moa to see if that would clean it out .. i drove it home and it has not stopped the problem yet . please if any one has any suggestions i would be grateful

Share this post


Link to post
Share on other sites

what was the weight of oil used?

can you locate specifically where the tapping noise is comming from (ie valve covers, timing belt cover, etc.)?

Share this post


Link to post
Share on other sites

If it is a regular tap-tap-tap-tap-tap that continues and goes throughout all speeds, it is not likely the timing belt. I would think it's the valves sticking. Your synthetic oil may make it go away in time.

The timing belt tensioner sounds like a somewhat "slaping" sound, and possibly come and go from time to time.

A friction gear knocking sound is more of a knocking that ONLY happens below 2000 RPM.

Share this post


Link to post
Share on other sites

Id say very much that it is your hydraulic lifters. Particularly on the No. 1 cylinder. I have the same problem. I had it ever since i bought the car, and even with synthetics it still does it :s

Oh well, you learn to live with it i guess. lol

Share this post


Link to post
Share on other sites

Yea it's called HLA's. Our cars are notorious for it. Just do closer oil changes (for one or two changes) and put in synthetic. That should make most of it dissapear. From my research so far, the tapping doesn't do anything bad and it's a lot of work to fix it. Basically take half the engine apart and fix little metal springs and balls. And even then it might come back later. If it ain't broke, don't fix it.

Did you go to a guy specializing in Mazda/Ford engines, or a general mechanic? It seems that he's trying to make a quick buck off you, IMHO. The other thing would be is that he is not familiar with the above problem. Hope you get it straightened out keep us posted.

-M

Share this post


Link to post
Share on other sites

its obviously a sign that your engine is about to die soon , be best to offload the car onto someone else

Share this post


Link to post
Share on other sites

Hi!

Don't, under any circumstances, take Jmoore's advice!

I would tend to agree with Trebuchet or Homidid7, and no! Cooluser23s, our cars aren't notorious for it! It's a 97, not a pre 95.

Flora

Share this post


Link to post
Share on other sites

Actually cooluser23s is most likely correct. Its pre 98. After that they used solid lifters. So it is "most likely" the HLA's. Use the search and you will find out for yourself. Definatley have it checked out by someone to make sure but the pre 98 cars were "notorious " for makin that sounds. For the most part its completley harmless.

Share this post


Link to post
Share on other sites
Actually cooluser23s is most likely correct. Its pre 98. After that they used solid lifters. So it is "most likely" the HLA's. Use the search and you will find out for yourself. Definatley have it checked out by someone to make sure but the pre 98 cars were "notorious " for makin that sounds. For the most part its completley harmless.

Actually, I'm not sure if 98+ are excepted from the HLA problem. I have a '99 V6 and a Probe owner that heard my engine thinks I might have a slight HLA tick on my car. I'm not sure if he's right, but it's quiet enough that I never really think about it.

If they are excepted, that's good to know though.

-M

Share this post


Link to post
Share on other sites
Actually, I'm not sure if 98+ are excepted from the HLA problem. I have a '99 V6 and a Probe owner that heard my engine thinks I might have a slight HLA tick on my car. I'm not sure if he's right, but it's quiet enough that I never really think about it.

If they are excepted, that's good to know though.

-M

The 98+ engines don't use HLA's whatsoever... But you're supposed to check valve clearance every 30K miles -- if the clearance is out of spec, add shims (which will get rid of the tick) ;)

Share this post


Link to post
Share on other sites

Actually, I'm not sure if 98+ are excepted from the HLA problem. I have a '99 V6 and a Probe owner that heard my engine thinks I might have a slight HLA tick on my car. I'm not sure if he's right, but it's quiet enough that I never really think about it.

If they are excepted, that's good to know though.

-M

The 98+ engines don't use HLA's whatsoever... But you're supposed to check valve clearance every 30K miles -- if the clearance is out of spec, add shims (which will get rid of the tick) ;)

Interesting. What do you mean by valve clearance? Now I'm getting worried. I thought Mazda were non-interference engines. Or am I mixing up two things that are unrelated..

-M

Share this post


Link to post
Share on other sites
Interesting. What do you mean by valve clearance? Now I'm getting worried. I thought Mazda were non-interference engines. Or am I mixing up two things that are unrelated..

-M

Unrelated (me being lazy actually)... Its valve tappet clearance... Where the cam lobe meets the tappet. If a space develops in there, the cam lobe is going slap against the tappet making a ticking noise.... sorry about the confusion :/

Share this post


Link to post
Share on other sites

I forget the web page address, but its a mazda 626/mx-6/probe faq...

anyways it talks about this problem and it mentions that its around the valve cover near the intake manifold. I think they say its a spring that cause a tapping noise...my mx makes it and i'd have to say its more of a paddle noise it sounds like somebody taking a wooden paddle and slapping it against another one. Could this be the problem, or is that what your talking about already tre?

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now
Sign in to follow this  
Followers 0