Thoughts on this noise? 13b
So I picked up a 91 FC that had been sitting for a few years, after getting all the crap cleaned out and finally running I come to hear this noise. My thought after some poking around is the chain for the cas on the oil pump, thoughts? The noise is really only at idle, when free revving the noise goes away which makes me think its the slop in the chain at low rpms is the noise. P.S. the water pump/Alt was not hooked up for this short video.
https://photos.app.goo.gl/9Pkatw4LHz4FosR19 |
Originally Posted by Falconpuunch
(Post 12314382)
So I picked up a 91 FC that had been sitting for a few years, after getting all the crap cleaned out and finally running I come to hear this noise. My thought after some poking around is the chain for the cas on the oil pump, thoughts? The noise is really only at idle, when free revving the noise goes away which makes me think its the slop in the chain at low rpms is the noise. P.S. the water pump/Alt was not hooked up for this short video.
https://photos.app.goo.gl/9Pkatw4LHz4FosR19 |
How does the engine sound with an air filter on it? That is a strange sound to he honest. Have you checked the exhaust heat shields to ensure none are loose? Its hard to hear in the video to be certain if its a whistling or ringing noise..
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Originally Posted by Falconpuunch
(Post 12314382)
So I picked up a 91 FC that had been sitting for a few years, after getting all the crap cleaned out and finally running I come to hear this noise. My thought after some poking around is the chain for the cas on the oil pump, thoughts? The noise is really only at idle, when free revving the noise goes away which makes me think its the slop in the chain at low rpms is the noise. P.S. the water pump/Alt was not hooked up for this short video.
https://photos.app.goo.gl/9Pkatw4LHz4FosR19
Originally Posted by mazdaverx713b
(Post 12315129)
How does the engine sound with an air filter on it? That is a strange sound to he honest. Have you checked the exhaust heat shields to ensure none are loose? Its hard to hear in the video to be certain if its a whistling or ringing noise..
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well, since i have no experience with them going bad, does anyone know what bad thrust bearings sound like?
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.
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Originally Posted by rxtasy3
(Post 12315194)
well, since i have no experience with them going bad, does anyone know what bad thrust bearings sound like?
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If he replaced the timing chain, I wonder if he replaced the thrust washers and plates.
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Originally Posted by mazdaverx713b
(Post 12315261)
If he replaced the timing chain, I wonder if he replaced the thrust washers and plates.
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With the WP and alternator eliminated that’s the only thing I can think of too. But be really careful changing the bearing/race stack with engine in the car. Be sure to do your homework. |
Good luck, and congrats on your 7
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How much run time would you need on fresh oil to find bearing material?
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It's literally anyone's guess. But why guess? Go back in and inspect it to confirm or eliminate it.
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Update, noise is gone after deleting OMP and adding premix. Thinking the front rotor housing wasn't getting any oil causing that noise(no Oil in/on the injector when I pulled it). Car thanked me with low oil pressure(installing aftermarket gauge to confirm) and the alternator bearing decided it was next.
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