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Old 08-13-2021, 11:19 PM   #1
jjswamp
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Exclamation rebuild 2013 scion fr-s engine still knocking?

Please help >.<

I have had my engine rebuilt by changing the short block due to the infamous issue with these engines going bad. Just like many other frs/brz 2013/14 owners, after i got my car back from the engine valve spring recall it went bad. For mines, since i baby it too much i barely drove it, and the problem came after 1year. It had a rod knock. I had second/third/fourth/ opinions with the diagnose and they all said the same. And then, I had it fixed by replacing the short block. Now my question is with this video Im going to attach. Do i still have a knock?



please watch the whole 28 seconds as i move the phone around.
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Old 08-14-2021, 12:26 AM   #2
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Quote:
Originally Posted by jjswamp View Post
Please help >.<



please watch the whole 28 seconds as i move the phone around.
Well, jjswamp, welcome to ye ol forum. Sounds like you have had some nasty luck with your car -

A few questions:

How many miles on the new block?

Do you have any power mods?

Have you tracked the car with this engine?

To me, it doesn't sound like a rod knocking, it sounds more like a valve tappet out of spec.

Others will chime in soon.

Good luck.
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Old 08-14-2021, 02:33 AM   #3
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Yo, @Ultramaroon - this fellow @jjswamp , needs some help. What do you hear?

He says the block has about 10,000 miles on it; he hasn't tracked it; no power mods.

Others?

Where is everybody? -
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Old 08-14-2021, 04:00 AM   #4
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Ooo... That's bad. I agree with you, @humfrz. That's a valve. Bent?
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Old 08-14-2021, 05:05 AM   #5
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Would be inclined to agree, I donít think itís rod knock, sounds more like the valve train, I would not be surprised if your valves are out of tolerance, having built the valve train on an FA20 itís a time consuming meticulous job and ďclose enoughĒ is not good enough. Either way I think your going to have to strip the heads to find your problem, and hopefully itís not a bent valve.
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Old 08-14-2021, 04:19 PM   #6
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I agree. If it has sounded like that since the first startup, it just needs properly shimmed.
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