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95.5-2004 Tacomas & 96-2002 4Runners 4th gen pickups and 3rd gen 4Runners

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Old 02-06-2005, 12:40 PM   #1
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22re engine knock

I've got a '94 truck with 22re engine and 152K miles. Engine generally runs good and smooth, no smoking. But when I'm driving there is a knocking/tapping noise coming from the enigne with only very light throttle application. When your accelerating its fine and with your foot off the accelerator/coasting its fine, you only hear it when you give a light throttle input. Any thoughts would be great! Thanks in advance!
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Old 02-06-2005, 01:18 PM   #2
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sounds like valves might be out of whack.
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Old 02-06-2005, 03:58 PM   #3
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This same thing happen to me, I forgot to put the fuel filter back on after a put a new one in, it would hit the inner frame with a very loud knocking noise. It would only do it when I gave it gas (idle was fine). Check to see if any fittings are loose first before you start looking into big problems.

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Old 02-06-2005, 04:14 PM   #4
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is it a tick or a knock?
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Old 02-06-2005, 05:18 PM   #5
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It's more of a knock than a tap. I'm afraid it might be a rod bearing, but I hoped someone might have seen something similar. I'm also wondering if any type of timing chain problem could cause this noise.
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Old 02-07-2005, 05:25 AM   #6
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If it is around the 2K rpm range then I would say timming chain. But that sounds more like a rattle, like running a stick along a chain link fence type sound.
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Old 02-07-2005, 08:01 AM   #7
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I had a rod knock that gave the same symptoms. It could only be heard at very light throttle at first, and it sounded more like a wrist pin than a rod knock. If you can get it to make the noise without driving it, have someone run the throttle while you crawl underneath it. If it's a rod knock it'll be way way louder when your head is close to the oil pan.
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Old 02-07-2005, 08:01 AM
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2000, 22r, 22re, automatic, constant, engine, knock, knocking, rod, rpm, sound, symptoms, tapping, transmission, troubleshooting

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