Spun bearing? No mechanic knows where I'm at. - Chevy Trailblazer SS Forum
 

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Old May-16-17, 10:39 PM   #1

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Default Spun bearing? No mechanic knows where I'm at.

Hey guys so I have a 2008 ss with 188,xxx kms cai, muffler and a tune from super chips. I've noticed a tiny rattle during certain rpms since I bought the truck last year I've put about 8 to 10k of kms on it since then the noise has gotten worse and worse. I've decided to stop driving it before something happens. I've brought it to 3 mechanics I'm in northern Alberta and nobody can give me a straight answer other then pull the motor. I keep hearing lifters or bearing or timing ? Hope you guys Here is a link to the video


https://youtu.be/QK0OfUzxpkw
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Old May-16-17, 11:16 PM   #2
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Spun bearing. Sorry man
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Old May-16-17, 11:39 PM   #3

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Ya I figur3d that was the case I've clocked alot of kms on it must have just been lucky.
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Old May-17-17, 01:58 AM   #4
 
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How's the oil look? Glittery?
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Old May-17-17, 09:57 AM   #5

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Oil was fine, oil pressure is fine too.
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Old May-17-17, 12:38 PM   #6
 
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Remove oil filter and cut open. If it's a spun bearing you will see metal flakes.
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Old May-17-17, 02:25 PM   #7

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It's a wrist pin

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Old May-17-17, 03:06 PM   #8
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It's a wrist pin

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What would make u think that?
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Old May-17-17, 06:52 PM   #9

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What would make u think that?
It's what it sounds like to me on the video, however it could be a bearing, if he doesn't have metal in his oil it's definitely a wrist pin.

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Old May-17-17, 07:12 PM   #10
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It's what it sounds like to me on the video, however it could be a bearing, if he doesn't have metal in his oil it's definitely a wrist pin.

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U think the wrist pin has came loose? I'm curious because the wrist pin failures I've seen create metal too!
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Old May-17-17, 07:15 PM   #11
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That and to guess a wrist pin failure over a bearing in these motors is a long shot. It sounds just like a bearing failure but never can be 100% until u tear it down I guess.
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Old May-17-17, 07:17 PM   #12

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They can cause metal, but a lot of the time you want have metal when it's a wrist pin, if it's the wrist pin he can just pull the one head and get one rod and piston

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Old May-17-17, 07:24 PM   #13
 
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Sorry about this bro.
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Old May-17-17, 07:53 PM   #14

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try changing the ignition switch.












j/k obv
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Old May-17-17, 08:58 PM   #15
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They can cause metal, but a lot of the time you want have metal when it's a wrist pin, if it's the wrist pin he can just pull the one head and get one rod and piston

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Problem is it's not a wrist pin, it's a bearing
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Old May-18-17, 12:34 AM   #16
 
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Time to drop the pan and check the bearings...
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Old May-19-17, 06:16 PM   #17

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Drop the ban and look at the bearings. If you are 2wd this isnt a bad job.

Remove crossmember, remove RT steering rack bolts, loosen left steering rack bolts and you can drop the pan.

Remove the pan and windage tray and you can see the end caps. If the knock is bad enough for a spun bearing, you might be able to wiggle the rod ends with your hand.

If you want to try to bandaid it, remove said rod caps (number/direction accordingly) use a micrometer and measure the crank journals. Summit sells bearings up to 40 over/under (i forget how they measure it).

Ask me how I know.....
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