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Engine chirp... possible bad bearing?

Old 10-02-2018, 03:35 AM
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Engine chirp... possible bad bearing?


Not sure if any of you have experienced this or know the culprit... sound is heard through all gears while accelerating and when pulling the throttle cable in neutral. Iíve been told it could be a bad bearing. The engine was rebuilt but Iím not sure to what extent or how long ago and way too much silicon was used on reassembly however Iíve taken the valve cover off and everything seems to be ok, lots of oil everywhere, not burning any, slight glaze of oil around the pan and thatís about it. I have yet to redo timing since installing the Weber and recently purchased feeler gauges to check valve clearances.

87 pickup 4x4
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Old 10-02-2018, 02:50 PM
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Could be rod knock. Pull one plug wire off at a time and see if it stops making the sounds. Could be timing knock too if your timing is way out of wack. Check engine oil for fine metal shavings.
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Old 10-02-2018, 03:30 PM
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Originally Posted by superex87 View Post
Could be rod knock. Pull one plug wire off at a time and see if it stops making the sounds. Could be timing knock too if your timing is way out of wack. Check engine oil for fine metal shavings.

Will do thanks. I was unsure because itís very loud when Iím in 1-3 gears, get a lot of rubber necking, and itís got such a high note chirp rather than a knock I thought was associated with rods/bearings. Also the sound has been going on for a while, I bought it in May this year and has gotten a little worse over time since I initially thought it was pulley or clutch related. But now itís very constant, doesnít seem to get worse or better with sea foam, Lucas, or Metal Lube. Iíve pulled the belts and sound still goes and had an Aisin clutch kit installed only 2k miles ago.
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Old 10-02-2018, 05:53 PM
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Mechanics stethoscope, long screwdriver, wooden dowel... Just about anything solid you can press against various bits if the engine while keeping your head out of the danger zone..

Don't guess where the sound is, listen and it will tell you.
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