Miata Rod Knock
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Uploader Comments (AAddaamm03)
All Comments (29)
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@charlesdhall hey charles, I have a 2008 Miata with the 2.0. Its starting to make this same noise also. Do the newer engines have this same problem with the thin oil? 25K miles. I took it to Mazda and they "did not hear anything." It does it at about 1800 to 200 rpm inder light load. Thanks for any information you may have.
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@JgHaverty : I took oil pan off yesterday and it was rod bearing ticking, but only one.the crank itself was good just needed to sand with 0 sand paper.
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@datka1980 Its starting out only at high rpms. It will deteriorate and get worse, im sorry. If you have some mechanical aptitude, you can purchase a used crank and get some new rods off ebay for fairly cheap and do it yourself on a saturday afternoon. Feel free to message me, and we can chit chat.
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@JgHaverty : Hay I have the sound on my 2002 toyota celica GT. It has no sound on idle but only when you accelerate. I hope it is only rod bearing as well. how much did it cost you to fix it?
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@Carsonplmtff no its not.
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Not a ford engine --> ford used mazda engines even back in the 1.3ltr festiva (a true powerhouse) - sorry yours had SIDS but these things often go for 300k + miles. I just took apart one with 166,000 and you can still see hone marks on the cylinder walls!
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check with stethoscope to pin down the noise. The timing chain tensioner and guides are worn out
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My 2002 Miata made the exact same noise. I also thought it was a rod knock and so did all of the mechanics where I took it. It turned out that the water pump was bad. I had the water pump replaced and the noise is gone! :)
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was it a rod bearing, or a crank bearing? or was it the camshaft bearing?
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hahaha ford escort motor
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Good news it is the HLA's. One or more have collapsed and you are hearing the sound of the overhead cam lobe slapping into the HLA's. Using a thinner oil (5w30 synthetic) can even correct the problem for some cars. If not remove the valve cover and check the gap between the cam lobe and the HLA's is not more than 0.015 inch. If it's more than 0.015 inch go to the KIA dealer and purchase a set for the 1994-1997 Sephia GS as they use the same engine and you save big bucks. Hope this helps. Charles
charlesdhall 4 years ago
Thanks for the good news. Too bad it was a spun rod bearing and a scored crankshaft journal instead.
AAddaamm03 4 years ago 3
It was a spun bearing.
AAddaamm03 4 years ago
That don't sound good, how did you manage to break it?
Bowerso 4 years ago
Poor assembly by the person's machinist that I bought the car from. Of course he wouldn't allow me to speak to the guy or honor any type of deal. Oh well, has a big motor now. :)
AAddaamm03 4 years ago
by, "big motor" do you mean a v8 swap, or the 2.0 motor?
JgHaverty 3 years ago
V8 swap.
AAddaamm03 3 years ago 6