Might even start up a collection to help poor old Jeff pay for the replacement 
lifter collapsed, engine is gone
Melting Slicks
Joined: Apr 2008
Posts: 2,814
Likes: 0
From: Some where in Amerika, sadly watching how is turned into a Socialist Republic.
Lifter started ticking about a month ago, took it in for a check and we were going to do an oil pressure check to see about the oil pump. 2 days later on the way to work, going 15mph around a 90 degree corner, car lost power, engine stopped, car backfired. The rest is history.
Do you have a lot of miles on this engine?
Team Owner
Joined: Aug 2003
Posts: 38,314
Likes: 35
Sorry to hear that your engine is gone.
Looks like he got a little over 40,000 miles on it.
http://forums.corvetteforum.com/show...post1563077705
Not bad, I guess considering that it was modified as heavily as it was.
Looks like he got a little over 40,000 miles on it.
http://forums.corvetteforum.com/show...post1563077705
Not bad, I guess considering that it was modified as heavily as it was.
Thread Starter
Safety Car
Joined: Dec 2004
Posts: 4,477
Likes: 2
From: Boca Raton, FL
St. Jude Donor '05-'06-'07-'08-'09-'10-'11-'12-'13-'14
Team Owner
Joined: Apr 2008
Posts: 22,566
Likes: 1,696
From: South Carolina
Something is wrong with this picture, I just can't see how a collapsed lifter doing all that damage, I gould get a second opinion. A colapse lifter? valves bent? timing chain gone. I can understand the damage from over reving, but not from a collapsed lifter, or maybe it was explained wrong.
Safety Car
Joined: Dec 2007
Posts: 4,974
Likes: 148
From: Magnolia Texas
Just got the call. Lifter collapsed and got stuck in the bore hole (my ignorance is showing, I have no idea what that is). Several valves are bent, pistons are nicked, timing chain is shot, cam is suspect AND the block is gone
So, looks like a new short block for my C6.
So, looks like a new short block for my C6.
good luck building the 403!
Melting Slicks
Joined: Apr 2008
Posts: 2,814
Likes: 0
From: Some where in Amerika, sadly watching how is turned into a Socialist Republic.
Just got the call. Lifter collapsed and got stuck in the bore hole (my ignorance is showing, I have no idea what that is). Several valves are bent, pistons are nicked, timing chain is shot, cam is suspect AND the block is gone
So, looks like a new short block for my C6.
So, looks like a new short block for my C6.
Safety Car
Joined: Aug 2007
Posts: 4,836
Likes: 9
From: Rushsylvania Ohio
Here we go... lifter collapses and then valve(s) in that cylinder hit piston. Valve snaps off or is bent to one side and piston comes up and smacks it and comes to a violent stop (bent rod). Other cylinders keep trying to spin crankshaft and timing chain, but cam can not spin because rocker arms for the bad cylinder can not move. Timing chain now shears off teeth and the rest of the valvetrain begins to come apart, go out of time and other valves hit other pistons and the block quickly turns to junk. Lucky the crank did not snap in half. And all the above just happened in the blink of an eye. Yes, a collapsed lifter can destroy and engine.
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Team Owner
Joined: Apr 2008
Posts: 22,566
Likes: 1,696
From: South Carolina
Here we go... lifter collapses and then valve(s) in that cylinder hit piston. Valve snaps off or is bent to one side and piston comes up and smacks it and comes to a violent stop (bent rod). Other cylinders keep trying to spin crankshaft and timing chain, but cam can not spin because rocker arms for the bad cylinder can not move. Timing chain now shears off teeth and the rest of the valvetrain begins to come apart, go out of time and other valves hit other pistons and the block quickly turns to junk. Lucky the crank did not snap in half. And all the above just happened in the blink of an eye. Yes, a collapsed lifter can destroy and engine.
Melting Slicks
Joined: Jan 2006
Posts: 2,713
Likes: 0
Only if it fragments, and then pieces maybe stop up oil pump.
No lifter = valve held by spring against seat, cylinder just not doing anything. Not very exciting.
So.... either retainer or spring loss, maybe.
Safety Car
Joined: Aug 2007
Posts: 4,836
Likes: 9
From: Rushsylvania Ohio
Team Owner
Joined: Apr 2008
Posts: 22,566
Likes: 1,696
From: South Carolina
Team Owner
Joined: Apr 2008
Posts: 22,566
Likes: 1,696
From: South Carolina
Melting Slicks
Joined: Jan 2006
Posts: 2,713
Likes: 0
This was a blown, cammed motor. It could have been over revved, a keeper could have come loose.... most likely, a valve spring busted because it was used for 40K miles w/o replacement.
Lots of things could have happened.
But, IMHO, simple loss of a lifter ain't what started this chain of events.
Team Owner
Joined: Oct 2002
Posts: 20,166
Likes: 2
From: Spacecoast Florida
Melting Slicks
Joined: Jan 2006
Posts: 2,713
Likes: 0
Quote:
Originally Posted by ucfmike79
Yea I dyno'd...here are mods 05 C6 mn6 :
AFR 205
Kooks 1 7/8 LT w cats
Bassani exhaust
Halltech intake
G1 228/232 113 cam
springs rated up to .650 lift
Jeremy Formato tune (good guy...was pleased with his work)
Originally Posted by ucfmike79
Yea I dyno'd...here are mods 05 C6 mn6 :
AFR 205
Kooks 1 7/8 LT w cats
Bassani exhaust
Halltech intake
G1 228/232 113 cam
springs rated up to .650 lift
Jeremy Formato tune (good guy...was pleased with his work)
schilitj: Our numbers are almost identical: mine 443/399. Have AFR 225, 224/231 581/592 cam, dynatech 1 7/8 headers and corsa exhaust.
Here is the $1.98 question: what about the springs?
918's?
26918:
• Extended .625” max lift, 125 lbs seat pressure at 1.800” installed height for aggressive cam designs
• Incorporates 10+ years of Beehive™ Valve Spring development and refined manufacturing processes
• Designed with GM Gen III/LS engines in mind – for use with hydraulic and solid roller camshafts
• Features manufacturing processes found in exotic race springs, providing a unique silver satin finish
Seat Load: 125 lbs @ 1.800" Open Load: 367 lbs @ 1.100" Coil Bind:1.100"
• Extended .625” max lift, 125 lbs seat pressure at 1.800” installed height for aggressive cam designs
• Incorporates 10+ years of Beehive™ Valve Spring development and refined manufacturing processes
• Designed with GM Gen III/LS engines in mind – for use with hydraulic and solid roller camshafts
• Features manufacturing processes found in exotic race springs, providing a unique silver satin finish
Seat Load: 125 lbs @ 1.800" Open Load: 367 lbs @ 1.100" Coil Bind:1.100"
Valve spring failure photos:
http://www.cheersandgears.com/forums...howtopic=17259
Last edited by TrackNoob; Apr 14, 2008 at 11:05 PM.
Thread Starter
Safety Car
Joined: Dec 2004
Posts: 4,477
Likes: 2
From: Boca Raton, FL
St. Jude Donor '05-'06-'07-'08-'09-'10-'11-'12-'13-'14
The push rod would bend because....?
This was a blown, cammed motor. It could have been over revved, a keeper could have come loose.... most likely, a valve spring busted because it was used for 40K miles w/o replacement.
Lots of things could have happened.
But, IMHO, simple loss of a lifter ain't what started this chain of events.
This was a blown, cammed motor. It could have been over revved, a keeper could have come loose.... most likely, a valve spring busted because it was used for 40K miles w/o replacement.
Lots of things could have happened.
But, IMHO, simple loss of a lifter ain't what started this chain of events.
When the engine let go I was doing 15mph around a 90 degree corner. I heard a lifter start ticking about a month ago, was just getting ready to take it in for service and replacement as needed. My car is only worked on by vette specialist, Horsepower Sales, the group that did all the mods.
Like you, I'd love to know what started the chain of events, unfortunately I don't think I'll ever find out.
Safety Car
Joined: Aug 2007
Posts: 4,836
Likes: 9
From: Rushsylvania Ohio