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Old 01-26-2012, 11:53 AM   #1
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Default 3.4 gm impala ticking

got a 3.4 v6 impala, 2002, with a ticking noise at idle. coming from center of engine/valve area.

pulled the VCs and no visual damages to rockers or springs. my next guess is lifter is crushed? its noticable at idle and seems to go away once driving, so its something thats not getting oil pressure at idle.

is lifters going out in these things common? car came in before with a mysterious misfire code in the back cylinders, car just had plugs and wires done with fuel cleaning. then came back few weeks later with th CEL. Talked to one buddy at a local shop that says they see alot of them come in with broken valve spring or lifter that causes the misfire random codes.

am i leaning towards lifters? customer doesnt really wanna tear apart motor unless we gotta.

thanks
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Old 01-26-2012, 12:04 PM   #2
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Mine did that, it's just what they do. Probably one of the worst engines ever made. Replacing the lifter would probably solve the problem, unless the intake gaskets are leaking on to it, that will do it too.
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Old 01-26-2012, 01:15 PM   #3
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Don't these early 00 3.4's have camshaft wear issues/failures?

My buddies 00 Olds 3.4 van had a camshaft crack in half.
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Old 01-26-2012, 01:33 PM   #4
 
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I know a guy with a '97 lumina with 321,000 on the clock that I do all of the work on. It's got the 3.1 in it but still the same thing basically. His ticks, but its got a lot of miles so its not something that I'm worried about. Oh, and its still running the original trans!
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Old 01-26-2012, 01:39 PM   #5
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Quote:
Originally Posted by Dasfinc View Post
My buddies 00 Olds 3.4 van had a camshaft crack in half.
My $500 lumina did the same thing Stupid piece of shit motors.
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Old 01-26-2012, 04:14 PM   #6
 
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I'm pretty sure they lifter tick from the factory.
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Old 01-26-2012, 08:29 PM   #7
 
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its a lifter. mine does it, they all do it. its a known issue with these engines.
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Old 01-27-2012, 08:12 AM   #8
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thanks guys.

its not like a quiet little tick either. pretty dang noticable at idle but once driving it quiets out.
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Old 01-27-2012, 09:10 AM   #9
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Yea, it's a GM brah, what do you expect?
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