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A lot of metal shavings on oil pan drain plug

 
Old 06-24-2019, 03:59 PM
  #21  
Dan_the_C5_Man
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Originally Posted by Jfryjfry View Post
Not sure why there wouldn’t be the same in the filter, but that doesn’t mean your motor is borked. It could be debris from the previous incident and, with luck, it is being filtered out and settling in the pan.

Although it might be chewing up the pump.

If it isn’t leftover from before, I’ve seen the sides of the connecting rods get chewed up and maybe that’s what’s happening here.
Connecting rods are Ti, and Ti is not ferrous (won't stick to the mag plugs).
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Old 06-25-2019, 01:18 AM
  #22  
Jfryjfry
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Ahhh of course!
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Old 07-09-2019, 12:33 PM
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any update ?
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Old 07-10-2019, 12:04 PM
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.0020-.0030 is too large to run on the mains. .0015-.0020 on the mains is good with 5w-30 and .0018-.0022 on the rods. Remember with the aluminum block, the clearances are going to open up once up to temp more than an iron block will.

There are a lot of places for metal shaving to hide in a LS. Especially in the passageway where the oil restrictor barbel lives.

Last edited by spartan8270; 07-10-2019 at 12:05 PM.
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Old 07-10-2019, 04:56 PM
  #25  
meanjoe
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I'd also like to know what happened. It would also be nice to know if that pile of shavings in the first picture is dime size or fist size?

Last edited by meanjoe; 07-10-2019 at 04:59 PM.
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Old 07-10-2019, 05:06 PM
  #26  
SilverBulletC6Z
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So I decided to just pull the motor and figure out where those shavings are coming from, would be a shame to destroy new cylinder heads trying to ignore an obvious problem. Motor is halfway out should be fully torn down by end of this week.

The shavings were a bit smaller than the size of a dime, probably closer to a 1/4” - 3/8” ball.

I think the shavings may be pushrods rubbing on the cylinder heads, not sure yet could be anything at this point.

Last edited by SilverBulletC6Z; 07-10-2019 at 05:06 PM.
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Old 07-11-2019, 02:08 AM
  #27  
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One thing I learned during my rebuild was probably the most important thing to do is measure pushrod length....several times with an actual tool. My engine builder was very very meticulous about this, we sent two sets back and almost ended up sending the third back and we were gonna have cam motion make us a custom length, but the third set end up measuring almost perfect only way to get any more ideal would have been a complete custom set measured individually.

Main bearing clearance is another big deal, LS7 is tight and can be even tighter when you open up the bottom end and use coated bearings another reason why I use 5W30 dudes make big mistakes chasing higher hot idle oil psi so they throw thick oil at it and that doesn’t end well.

Keep us posted man, definitely sub’d hate this happened again man, the stress level of **** like this is not fun.
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