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Old 01-21-2013, 10:52 PM   #1 (permalink)
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Default rod bearing or something else?

ok so i got a deal on another srt and i am trying to fix it. it has a knocking sound coming from it and it sounds like its in the head at time and others it sounds like its coming from the block. before i tear into it i was just wondering if i could get some opinions on what it could be. At idle its fine and up to about 1800 rpms, past 1800 and up is when it starts knocking. any help would be appreciated.


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Old 01-22-2013, 07:48 AM   #2 (permalink)
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Sounds like a bad rod bearing.
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Old 01-22-2013, 08:12 AM   #3 (permalink)
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Default Re: rod bearing or something else?

Heard that before.... Lol id pull the pan or drain the oil and see what you catch with a magnet.
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Old 01-22-2013, 11:39 AM   #4 (permalink)
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Default Re: rod bearing or something else?

Quote: Originally Posted by Creamer03 View Post
Heard that before.... Lol id pull the pan or drain the oil and see what you catch with a magnet.

What it end up being? Was it a rod bearing
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Old 01-22-2013, 11:43 AM   #5 (permalink)
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That's a rod bearing. Time to tear it down.
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Old 01-22-2013, 06:21 PM   #6 (permalink)
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Default Re: rod bearing or something else?

It ended up being #3 rod bearing...
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Old 01-22-2013, 06:48 PM   #7 (permalink)
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yup rod, final answer
Quote: Originally Posted by fivetoez View Post
Sounds like a bad rod bearing.

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Old 01-23-2013, 05:59 AM   #8 (permalink)
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Default Re: rod bearing or something else?

Quote: Originally Posted by fixit View Post
yup rod, final answer

So I need need to pull the motor or can I change them from underneath

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Old 01-23-2013, 06:14 AM   #9 (permalink)
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Default rod bearing or something else?

You can change them with the motor in the car. But it's only a temp fix. The crank should be taken out and the journals cleaned up/polished. If not it will only happen again. I have gone through this exact same problem.


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Old 01-23-2013, 06:19 AM   #10 (permalink)
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You can do it from underneath.
Take the plugs out, hot side pipe off, pan off, and balancer out.
Do them 2 at a time:
Turn the crank clockwise to where 2 of the pistons are at the bottom.
Remove the rod cap and push the piston up a little to get to the upper bearing. They pop right out.
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Old 01-23-2013, 09:42 AM   #11 (permalink)
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Default Re: rod bearing or something else?

Quote: Originally Posted by big4mike9 View Post
You can change them with the motor in the car. But it's only a temp fix. The crank should be taken out and the journals cleaned up/polished. If not it will only happen again. I have gone through this exact same problem.


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Thats all I need it for is temporary. Im needing it long enough build my other motor

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Old 01-23-2013, 10:04 AM   #12 (permalink)
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Depending on the damage already done changing won't matter. It might last one mile, it might last 100 miles. The only real way to fix this is by pulling the motor and doing a complete rebuild pretty much. You've got metal shavings all over the place in your oiling system now, other bearings were probably harmed as well, that rod is screwed and out of round, the cranks rod journal is scratched up/out of round now and will require replacement (or turning if we can turn out cranks?), after trying to do what you are going to do on my DSM TWICE many moons ago it always resulted in failure very quickly, much disappointment and tons of money wasted.
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Old 01-23-2013, 03:49 PM   #13 (permalink)
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Default rod bearing or something else?

I completely understand OP, I'm just saying prepare for a decent sized bill down the road. Good luck!


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Old 01-23-2013, 03:51 PM   #14 (permalink)
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Default Re: rod bearing or something else?

I would and will never only change bearings only on a rod or main. That's just asking for another problem in the future.
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Old 01-23-2013, 03:54 PM   #15 (permalink)
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Default Re: rod bearing or something else?

Quote:
I would and will never only change bearings only on a rod or main. That's just asking for another problem in the future.

Im not just changing just 1 im changing all 4 plus the mains.

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