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JDM FS engine replacement issues - TC, flexplate, starter

Mazda Protege This compact model offers an economical solution for the need for a sporty sedan or wagon.

JDM FS engine replacement issues - TC, flexplate, starter

Old 02-28-2019, 10:25 AM
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Join Date: Feb 2019
Location: Texas
Posts: 2
Question JDM FS engine replacement issues - TC, flexplate, starter


I am new to engine replacements, and am replacing my USDM FS engine with a JDM FS motor. It is a 2.0L with an automatic transmission.

I have had numerous issues along the way, but finally got it started only to hear an awful constant screech. I determined that my starter (from the old motor & tested as good at an auto parts store) was grinding against the flexplate after it finished cranking. There are also circular scraping signs on the back of the flexplate near the center, as if it was grinding on the block. This flexplate is from the old motor and was put on the new one according to the JDM store's suggestion.

Thinking the engine block could have some dimensional differences, I then changed flexplates back to what my JDM motor came with. Now, the torque converter studs appear too short to mate to the JDM flexplate, and I have not been able to mate them yet. The JDM flexplate has less depth on the teeth and less overall depth from the center to the teeth outer diameter.

I'm frustrated and running out of time. After a search of this great website, I didn't find someone with the same issue.
Does anyone have ideas/suggestions? Any help would be greatly appreciated. I can provide pictures later if necessary.
Old 03-19-2019, 02:47 PM
Junior Member
Join Date: Mar 2019
Location: FL
Posts: 1
Default Currently in the works of doing the same

I bought a JDM engine is well fs9 was told that the exhaust manifold, intake manifold and the flexplate had to be replaced with american ones...haven't put the flexplate on to find out if it will do the same on mine.. top is the usdm one bottom is the JDM one
Old 04-07-2019, 07:31 PM
Junior Member
Thread Starter
Join Date: Feb 2019
Location: Texas
Posts: 2

Thanks for the reply. I ended up using my usdm flex plate, but I had to add metal shims to the starter to get it to back away and not grind when the engine was started. So the engine runs now...which is great....BUT it won't shift into gear! (Even though the shift cable is actuating and the display lights show it moving into the correct gear). The AT light blinks after awhile of me trying to shift it into gear. Has anyone ever seen that?
Thanks again.
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