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PostPosted: Mon Jun 01, 2020 7:02 pm 
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I have an 1989 colt 4g15. Was driving fine, when it started to make load rattling noises. Maybe the belt is loose? I tried to tighten it but am struggling to figure out how. Link of the noise is below.
https://youtu.be/GdKNzh0OiTM


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PostPosted: Tue Jun 02, 2020 1:22 pm 
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The tensioner is a suspect here. Is it tightened down i. e. is it screwed completely into the block? Is its bearing not shot?


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PostPosted: Tue Jun 02, 2020 1:47 pm 
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Quote:
The tensioner is a suspect here. Is it tightened down i. e. is it screwed completely into the block? Is its bearing not shot?
Thanks for the response. I removed the timing belt and tensioner completely and they both seem fine. They also seemed tight when they were installed. I replaced them both around 20,000 miles ago. Now I'm thinking it could be the harmonic balancer.


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PostPosted: Wed Jun 03, 2020 11:20 am 
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It sounds much like a bearing. Alternator or water pump maybe?


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PostPosted: Sat Jun 06, 2020 4:38 pm 
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Could be a rocker arm out of adjustment. They are solid and require periodic adjustment with a feeler gauge and a 10 mm socket/torque wrench. If a stethoscope directly down to the bolt head on the tensioner doesn't show the sound louder to your ears, suspect and test at the valve cover in different spots. A long and large handled screw driver can provide the same effect I am told. Valve cover is very easy to remove and is probably leaking anyways, because old petrified gaskets.


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PostPosted: Sat Jun 20, 2020 11:55 am 
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I Couldn't figure it out so I brought it into a shop. Turned out to be a worn out sprocket. It was worn in the center causing it to rattle.


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PostPosted: Sat Jun 20, 2020 7:09 pm 
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Glad you got it sorted. Not a good sound.

Hopefully was only a few hundred dollars to get it repaired.


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