Stuck lifter? - Page 10 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

Reply
 
 
 
Thread Tools Search this Thread
Old 04-24-2010, 11:12 PM   #91
Senior Member
True Car Nut
Thread Starter
 
xtremerevolution's Avatar
 
Join Date: Jun 2007
Location: New Lenox, IL
Posts: 2,478
Thanks: 0
Thanked 0 Times in 0 Posts
xtremerevolution is on a distinguished road
Default

This was posted on w-body.com earlier in my thread:

Quote:
fun fact that may be related:

earlier i was reading a lot of threads on TGO, there was someone getting a lot of false knock and no reasonable explaination... the motor eventually got pulled(i think) and he noticed what was roughly a silver dollar sitting on his crossmember: it was his timing cover. or part of it, actually. his cam cut a hole out of it...

makes me wonder if you're getting valvetrain noises messing with the knock sensor...

alldata says the only time that code will set is if the engine is running and the cam signal is lost for 5 seconds or more... almost sounds like could have cam walk. it could explain the "knock" as well if it'* hitting the timing cover...
Somebody PLEASE tell me this isn't a possibility with a 3800.
xtremerevolution is offline   Reply With Quote
Old 04-24-2010, 11:16 PM   #92
Retired Senior Admin

Expert Gearhead
 
Danthurs's Avatar
 
Join Date: May 2006
Location: Sheboygan Wisconsin
Posts: 29,661
Thanks: 0
Thanked 16 Times in 13 Posts
Danthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to all
Default

I have never heard of it happening. The cam bolt would have to come loose. that would allow the cam sprocket to move. But the crank sprocket wont be able to move because it'* held in place by the oil pump. So the cam sprocket should stay in place.
Danthurs is offline   Reply With Quote
Old 04-24-2010, 11:39 PM   #93
Senior Member
True Car Nut
Thread Starter
 
xtremerevolution's Avatar
 
Join Date: Jun 2007
Location: New Lenox, IL
Posts: 2,478
Thanks: 0
Thanked 0 Times in 0 Posts
xtremerevolution is on a distinguished road
Default

Thank you. That'* what I wanted to hear.

To be completely honest, this whole problem has me worked up like crazy. I lose sleep over it. It annoys the living hell out of me that my engine vibrates under idle and that I have that stupid ticking noise. I feel like tearing the engine apart bolt by bolt to figure out what it is, but I don't have the time for it. I'm hanging by a thread hoping that the tune is what'* throwing everything off and that my knock is legitimate preignition, not some other loose mechanical part in my engine throwing off the sensor, like a loose camshaft, God forbid. I pulled the cam sensor to look at it and its in perfectly untouched condition.

Deep down somehow get the feeling that some invisible entity is trying to tell me to swap in an L67...

The whole reason this idea came up was because the car threw a code 342 today, camshaft sensor, which went away after I shut the car off and started it back up again. Evidently the code 342 only comes on when the car doesn't receive a signal from the cam sensor for at least 5 seconds.
xtremerevolution is offline   Reply With Quote
Old 04-24-2010, 11:44 PM   #94
Retired Senior Admin

Expert Gearhead
 
Danthurs's Avatar
 
Join Date: May 2006
Location: Sheboygan Wisconsin
Posts: 29,661
Thanks: 0
Thanked 16 Times in 13 Posts
Danthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to all
Default

Have you checked your flex plate and harmonic balancer? Other then those the only possible vibrations could come from the balance shaft being off. But that can only happen if you removed it for a rebuild and put it back together wrong. Easy to do if your not watching. But that can not happen on it'* own.
Danthurs is offline   Reply With Quote
Old 04-24-2010, 11:56 PM   #95
Senior Member
True Car Nut
Thread Starter
 
xtremerevolution's Avatar
 
Join Date: Jun 2007
Location: New Lenox, IL
Posts: 2,478
Thanks: 0
Thanked 0 Times in 0 Posts
xtremerevolution is on a distinguished road
Default

The harmonic balancer isn't wobbling. I did check that. What'* the flex plate and where is it?

I only removed the heads, not the timing cover or the balance shaft. I didn't touch either of those.

I can't begin to tell you how much I appreciate your help here.

I'll get a new video tomorrow so you can see what the engine sounds like at idle after a drive. Its a strange sound.

For now, have a listen at this again. Listen to the idling, and let me know if you hear anything unusual. Almost sounds like a diesel.

http://www.youtube.com/watch?v=m-C4lXnz5ho
xtremerevolution is offline   Reply With Quote
Old 04-25-2010, 12:00 AM   #96
Retired Senior Admin

Expert Gearhead
 
Danthurs's Avatar
 
Join Date: May 2006
Location: Sheboygan Wisconsin
Posts: 29,661
Thanks: 0
Thanked 16 Times in 13 Posts
Danthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to all
Default

Flex plate is the fly wheel.
Danthurs is offline   Reply With Quote
Old 04-25-2010, 12:06 AM   #97
Senior Member
True Car Nut
Thread Starter
 
xtremerevolution's Avatar
 
Join Date: Jun 2007
Location: New Lenox, IL
Posts: 2,478
Thanks: 0
Thanked 0 Times in 0 Posts
xtremerevolution is on a distinguished road
Default

Quote:
Originally Posted by Danthurs View Post
Flex plate is the fly wheel.
Haven't touched that at all, so I don't imagine it could be making any noise. Do those randomly start vibrating out of nowhere? What do you make of my idle?
xtremerevolution is offline   Reply With Quote
Old 04-25-2010, 12:11 AM   #98
Retired Senior Admin

Expert Gearhead
 
Danthurs's Avatar
 
Join Date: May 2006
Location: Sheboygan Wisconsin
Posts: 29,661
Thanks: 0
Thanked 16 Times in 13 Posts
Danthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to all
Default

I had another thought. Have you done a compression test? If one cylinder is off it can cause vibration.
Danthurs is offline   Reply With Quote
Old 04-25-2010, 12:40 AM   #99
Senior Member
True Car Nut
Thread Starter
 
xtremerevolution's Avatar
 
Join Date: Jun 2007
Location: New Lenox, IL
Posts: 2,478
Thanks: 0
Thanked 0 Times in 0 Posts
xtremerevolution is on a distinguished road
Default

Quote:
Originally Posted by Danthurs View Post
I had another thought. Have you done a compression test? If one cylinder is off it can cause vibration.
Can't say that I have. I figure I might as well at this point, although it doesn't make sense since the head gaskets are new. Unless I had a stuck lifter that was keeping a valve slightly open the whole time. I'll check compression tomorrow.
xtremerevolution is offline   Reply With Quote
Old 04-25-2010, 12:43 AM   #100
Retired Senior Admin

Expert Gearhead
 
Danthurs's Avatar
 
Join Date: May 2006
Location: Sheboygan Wisconsin
Posts: 29,661
Thanks: 0
Thanked 16 Times in 13 Posts
Danthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to all
Default

Other then that all I can think of is a bad motor mount.
Danthurs is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Possible stuck lifter ajgullery 1992-1999 4 09-26-2007 01:25 PM
lifter knock L27Buick 1992-1999 5 02-18-2004 09:06 PM
lifter clatter on cold start up DAVID94SSEI 1992-1999 22 01-06-2004 10:19 PM
Amazing Way to Clear Up Lifter Noise compyelc4 1992-1999 10 06-07-2003 03:41 AM
Lifter Knock bonnieman92 1992-1999 5 06-02-2003 10:55 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 01:40 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.