Death of my Ls1

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Mar 23, 2016 | 06:02 PM

wicked383lt1

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From: En Casa del Carajo

Death of my Ls1

This weekend I installed a circle d 3800 stall. Well I went to work today and flashed the stall but didn't go wot. About 10 blocks later it started knocking on and off. When I got home it was a constant knock. Not loud when at idle but only when I accelerate or put the car under a load. It sounds like it's coming from the oil pan area. Anything after 2500 rpm it gets loud

Last edited by wicked383lt1; Mar 24, 2016 at 07:27 PM.

Mar 23, 2016 | 07:40 PM

xdanny510x

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From: Hayward CA

Maybe ur tc is loose

Could be a lifter

Check ur oil for gold metal specs

Mar 24, 2016 | 07:29 PM

wicked383lt1

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From: En Casa del Carajo

Quote:

Originally Posted by xdanny510x

Maybe ur tc is loose

Could be a lifter

Check ur oil for gold metal specs

I checked the tc and it's good to go. I'm done

Mar 24, 2016 | 07:48 PM

shadowfirep

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From: Colorado Springs, CO

is your oil level ok? oil pressure? If you've heard rod knock before, is that what it sounds like? Does the engine vibrate in time with the knocking?

Mar 24, 2016 | 07:51 PM

Deeohgie69

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From: St Louis, MO.

Sorry to hear that!

I was going to mention the bolts too... wishful thinking.

Mar 25, 2016 | 07:50 AM

wicked383lt1

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From: En Casa del Carajo

Quote:

Originally Posted by shadowfirep

is your oil level ok? oil pressure? If you've heard rod knock before, is that what it sounds like? Does the engine vibrate in time with the knocking?

No vibration, the engine surges a bit. Maybe like 200rpm. I put a stethoscope to the oil pan and could hear a loud clacking sound. Oil looks good and so does the pressure. I've run royal purple since I bought the car with 70k. Car ran very strong up until this point.

Mar 25, 2016 | 07:56 AM

3.8TransAM

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From: Schererville, IN

Flex plate good? They crack and make noise

Bolts torqued/tight? They will rattle/make noise

Did u have proper converter depth in the transmission and properly installed along with some clearance to the flexplate with the trans bolted up and the converter installed?

Just odd everything was fine, you swapped the converter and now it makes noise?

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Mar 25, 2016 | 09:08 AM

wicked383lt1

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From: En Casa del Carajo

Quote:

Originally Posted by Circle-D_Brian

Try unbolting the converter and fire it up. You will have to do this step at some point if it is the engine, might as well be totally sure.

-Brian

I just had spoken to you on the phone that day from Miami asking about a break in period. I guess I'll drop the trans again and see if all looks good. If it is the motor, I'm going with a Lq9 block and install stronger connecting rods.