Timing problem
Melting Slicks
Joined: Oct 2002
Posts: 2,317
Likes: 111
From: St Louis MO
Hey guys! Here is the issue... I adjusted my timing according to the Lars timing docs and was having a detination problem. I emailed Lars and he told me to do a TDC test and here is the results. What do I do from here? It would apper that the balancer has slipped.
Any suggestions or input is greatly appreciated.
Any suggestions or input is greatly appreciated.
Here's an easy check: If the TDC mark aligns with one of the three bolts holding on the crank pulley (which also aligns with the keyway), AND if the inertial ring shows no wobble, you may simply have the wrong damper. If you are confident that there has been no slippage, mark a new TDC line on the damper and re-time.
Le Mans Master
Joined: Mar 2008
Posts: 5,948
Likes: 72
From: Oxford MA-----You just lost the game!!!!
http://www.summitracing.com/parts/rn...model/corvette
You'll need a puller:
http://www.summitracing.com/parts/wmr-w151p/overview/
Keep the shiny side up!
Scott
You'll need a puller:
http://www.summitracing.com/parts/wmr-w151p/overview/
Keep the shiny side up!
Scott
Instructor
Joined: May 2011
Posts: 191
Likes: 1
From: Orange Ca
Here is how I arrived at it.... I am working alone for the most part. I hook a compression test guage up to #1 and hand cranked until the needle moved up. I then put a long piece of wire in the plug hole and hand cranked until I had the piston at it's highest point, moving back and forth to verify.
Drifting
Joined: Apr 2007
Posts: 1,970
Likes: 45
From: Cameron Park CA
http://www.summitracing.com/parts/rn...model/corvette
You'll need a puller:
http://www.summitracing.com/parts/wmr-w151p/overview/
Keep the shiny side up!
Scott
You'll need a puller:
http://www.summitracing.com/parts/wmr-w151p/overview/
Keep the shiny side up!
Scott
But you will also need an installation tool. DO NOT use a hammer on the harmonic balancer, or use the retaining bolt to pull it on. You can strip the bolt hole in the nose of the crank.http://www.summitracing.com/parts/pro-66515/overview/
Take Lars' advise, replace it before it caused more $$damage$$.
Good luck,
Pete
Drifting
Joined: Mar 2011
Posts: 1,886
Likes: 9
I'm not disagreeing with the opinions given here but be aware that there is a dwell at TDC where the piston does not move but the crankshaft can still rotate a few degrees. To make sure you are at TDC use a piston stop. Forget the cheap ones you get from Jegs or Summit. Take a used spark plug and remove the porcelain center and electrode then screw a long 3/8" by 6 inches or so bolt in it. I ground the end down so it would not nick the top of the piston and I put a lock nut on it so i get the same result all the time. Turn the engine "by hand" clockwise till the piston hits the stop...mark the balancer then rotate the engine counterclockwise till it hits the piston...mark the balancer...TDC is in the middle of the two marks....
Le Mans Master
Joined: Mar 2008
Posts: 5,948
Likes: 72
From: Oxford MA-----You just lost the game!!!!
But you will also need an installation tool. DO NOT use a hammer on the harmonic balancer, or use the retaining bolt to pull it on. You can strip the bolt hole in the nose of the crank.http://www.summitracing.com/parts/pro-66515/overview/
Take Lars' advise, replace it before it caused more $$damage$$.
Good luck,
Pete
Keep the shiny side up!
Scott
Thread Starter
Drifting
Joined: Aug 2012
Posts: 1,650
Likes: 2
From: Tulsa Oklahoma
Ithink winter is here and time to just pull the engine and get dirty!!! I guess I need to look for threads that can lead me in the removal process now!!! I have never taken on anything like this 
Wish me luck!
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Le Mans Master
Joined: Mar 2008
Posts: 5,948
Likes: 72
From: Oxford MA-----You just lost the game!!!!
Don't worry, Stephanie will show you what to do.........
http://www.youtube.com/watch?v=QORm5fnCvYA
Keep the shiny side up!
Scott
http://www.youtube.com/watch?v=QORm5fnCvYA
Keep the shiny side up!
Scott
Thread Starter
Drifting
Joined: Aug 2012
Posts: 1,650
Likes: 2
From: Tulsa Oklahoma
Don't worry, Stephanie will show you what to do.........
http://www.youtube.com/watch?v=QORm5fnCvYA
Keep the shiny side up!
Scott
http://www.youtube.com/watch?v=QORm5fnCvYA
Keep the shiny side up!
Scott