Loud Engine Noise
Loud Engine Noise Here's the video of a car we just bought,'98 Formula M6. Runs and drives but makes this horrible *** noise. I'm thinking it's a spun rod bearing, but I'm sure some of the more veteran guys could chime in. Oil pressure is still at 40 upon start up and the motor has 133k on it. Let me know what you think.
yikes that doesnt sound good at all. I would not be driving it around to prevent any further damage. Its really hard to tell from the video whether its in the top end or the bottom end. I would pull the valve covers off first and see if all the rockers are still intact and make sure none of the pushrods are loose or broken. If all that checks out ok i would suspect its in the bottom end somewhere. You could also try draining the oil into a paint strainer and see if there is any particles in it
yikes that doesnt sound good at all. I would not be driving it around to prevent any further damage. Its really hard to tell from the video whether its in the top end or the bottom end. I would pull the valve covers off first and see if all the rockers are still intact and make sure none of the pushrods are loose or broken. If all that checks out ok i would suspect its in the bottom end somewhere. You could also try draining the oil into a paint strainer and see if there is any particles in it
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its my son's car and he did get a hell of a deal! Kook's headers and catted y-pipe, Maganflow catback,new monster clutch and flywheel, Tick clutch cylinder. body and interior are perfect. I did notice that the noise decreases as the rpm's rise as stated by LMIMCSS. what should we look for when the motor is taken apart, rod or main bearings, pistons?
Is it louder towards the bottom of the motor or top? This sounds almost exactly like my LS1 did when I found out it spun a rod bearing, and trashed everything except the block and heads. Sorry man, but that's what it sounds like to me 
If it is coming from the bottom of the motor then that is almost certain that's what it is
If it is coming from the bottom of the motor then that is almost certain that's what it is Is it louder towards the bottom of the motor or top? This sounds almost exactly like my LS1 did when I found out it spun a rod bearing, and trashed everything except the block and heads. Sorry man, but that's what it sounds like to me If it is coming from the bottom of the motor then that is almost certain that's what it is
If it is coming from the bottom of the motor then that is almost certain that's what it isBy the way, got the motor on the stand and I'll be tearing into it in the next day or two, I'll keep you guys posted
Ya figured it was a rod bearing. I would just find another stock rod wont cost you hardly anything. Have the rod checked out see how it looks you may be able to reuse it but i wouldnt.
