LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

blowing blue smoke on new engine

Old Jul 29, 2005 | 10:20 PM
  #1  
93redlt1's Avatar
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blowing blue smoke on new engine

is this normal. do the rings have to get seated or is this a problem of too much fuel being dumped. i have le2 heads and 32 # injectors and 255lph pump with a pcmforless tune. the rings are molys along with forged pistons and rods all in a 355.
Old Jul 29, 2005 | 10:48 PM
  #2  
ChevyTuffD.A.'s Avatar
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Re: blowing blue smoke on new engine

The most likely cause is the rings not being seated yet. Blue smoke means oil is getting into the combustion chambers. Let the motor get a few more miles on it and it should go away. If it doesnt eventually go away then the rings may not be gapped right. But most likely they just arent seated yet. Hope everything works out for u. Peace, Dustin.
Old Jul 29, 2005 | 10:58 PM
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Re: blowing blue smoke on new engine

If you have blue smoke then you have metal on metal contact. How is your oil pressure? Did you prime the motor prior to cranking it? Were the rings file fitted? I would look at all of these before I cranked it again so that you don't mess those good parts up!

94 LT1 Z28, Forged speed pro pistons, scat forged rods, moly rings, racing bearings, ARP main bolts, Comp Cam's 218/224 (.537/.545)lift, 1.6:1 roller rockers, racing port job w/2.02 intake and 1.57 exhaust valves, Hooker shorty headers and Hooker catback, B&M shiftkit.
Old Jul 30, 2005 | 12:36 AM
  #4  
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Re: blowing blue smoke on new engine

Originally Posted by 93redlt1
is this normal. do the rings have to get seated or is this a problem of too much fuel being dumped. i have le2 heads and 32 # injectors and 255lph pump with a pcmforless tune. the rings are molys along with forged pistons and rods all in a 355.
If ya have less than 500 miles don't worry about it.When and if the rings seat it will go away.

Drive it like ya stole it.
Old Jul 30, 2005 | 01:56 AM
  #5  
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Re: blowing blue smoke on new engine

The rings probably havn't seated yet, give it a little time and it should go away.
Old Jul 30, 2005 | 05:35 AM
  #6  
93redlt1's Avatar
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Re: blowing blue smoke on new engine

yes it doesnt have any miles on it yet. it has only been run for bout an hr total run time. thanks for all the quick responses.
Old Jul 30, 2005 | 05:43 AM
  #7  
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Re: blowing blue smoke on new engine

Beat the snot out of it to seat those rings.
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