Timing Chain Questions!
Thread Starter
Launching!
Joined: Jan 2010
Posts: 248
Likes: 0
From: Maryland
Timing Chain Questions! Okay so I have the cam in and did the pin (had to grind a little after knocking the pin in) so it fit in the gear of the timing chain, Now I see in this book and threads i need to use this degree angle finder thingy? is this necessary?! I can't find one of this ******* anywhere?! I have my springs on lubed up the cam installed that now I want to do my pushrods and rockers, im on a roll and really don't want to have to stop! HELP! 
Okay so I have the cam in and did the pin (had to grind a little after knocking the pin in) so it fit in the gear of the timing chain, Now I see in this book and threads i need to use this degree angle finder thingy? is this necessary?! I can't find one of this ******* anywhere?! I have my springs on lubed up the cam installed that now I want to do my pushrods and rockers, im on a roll and really don't want to have to stop! HELP!
Thread Starter
Launching!
Joined: Jan 2010
Posts: 248
Likes: 0
From: Maryland
Problem! I Cant get them to line up perfectly, I have been trying for 45min now! it looks like its a tad bit loose, but I've tried moving a link one way and moving a link the other but it only makes them further apart! pics ---> 
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
TECH Regular
Joined: Apr 2007
Posts: 420
Likes: 0
From: Kempner, TX
In doing the dot to dot method, the #1 piston MUST be at ABSOLUTE TOP DEAD CENTER no matter what the dot shows. Sometimes there are errors in the placement of the dot on the cranck gear, other times it's the Woodruff key in the crank or the key slot itself that are off.
Everything flows from ABSOLUTE TOP DEAD CENTER. Dots are merely reference points which many times are off.
Of course if the crank dot is off by a little, everything else will be off too. That's why a degree wheel is used to find ABSOLUTE TOP DEAD CENTER for the number #1 piston, which eliminates the possibility of the crank gear dot being stamped a little or the Woodruff key/slot being off.
If you don't degree your cam you won't know.
I always use the Positive Stop method when searching for ABSOLUTE TOP DEAD CENTER since that method eliminates the piston dwell at TDC. Using a dial indicator to find ABTDC causes you the guess as to how much dwell there actually is.
After finding ATDC, the timing chain gear dot is aligned to that reference point. Of course, that T/C dot could be off too. The dot to dot method should be re-named to the "I'm willing to take my chances" method.
Finding ATDC is the key; the accuracy of all else depends on that.
Jake
Everything flows from ABSOLUTE TOP DEAD CENTER. Dots are merely reference points which many times are off.
Of course if the crank dot is off by a little, everything else will be off too. That's why a degree wheel is used to find ABSOLUTE TOP DEAD CENTER for the number #1 piston, which eliminates the possibility of the crank gear dot being stamped a little or the Woodruff key/slot being off.
If you don't degree your cam you won't know.
I always use the Positive Stop method when searching for ABSOLUTE TOP DEAD CENTER since that method eliminates the piston dwell at TDC. Using a dial indicator to find ABTDC causes you the guess as to how much dwell there actually is.
After finding ATDC, the timing chain gear dot is aligned to that reference point. Of course, that T/C dot could be off too. The dot to dot method should be re-named to the "I'm willing to take my chances" method.
Finding ATDC is the key; the accuracy of all else depends on that.
Jake
Thread Starter
Launching!
Joined: Jan 2010
Posts: 248
Likes: 0
From: Maryland
I felt air seeping out of the exhaust runners! the valves were still held in place, but i could hear and feel air leaking out on the exhaust side! what does this mean?! all the springs are in!
I don't get how it isn't lined up? You move it more clockwise and it'll line up just fine. The crank gear does not look to be straight up. You also have to take timing chain play into consideration. You are making this far more of a big deal than it needs to be.
Run like what just fine? I'm not going to give you any guarantees on how it will run since I know nothing about your engine. It looks as though you have lined up the dots correctly. If you really want to be sure, go ahead and turn the crank gear to a true straight up position, take pic and post up.
dot to dot is #6TDC!! Jake is wrong!!! You better make sure you have your engine is in the right position before you go any farthur. Otherwsie your gonna have valves meeting pistons when you go to fire it up.
Dot to Dot =#6TDC (like in your pictures)
Crank dot 12o'clock Cam Dot 12o'clock = #1 TDC
Dot to Dot =#6TDC (like in your pictures)
Crank dot 12o'clock Cam Dot 12o'clock = #1 TDC
Last edited by Badazz 97 TA; Feb 28, 2010 at 04:16 PM.
dot to dot is #6TDC!! Jake is wrong!!! You better make sure you have your engine is in the right position before you go any farthur. Otherwsie your gonna have valves meeting pistons when you go to fire it up.
Dot to Dot =#6TDC (like in your pictures)
Crank dot 12o'clock Cam Dot 12o'clock = #1 TDC
Dot to Dot =#6TDC (like in your pictures)
Crank dot 12o'clock Cam Dot 12o'clock = #1 TDC
WHOOOOOOOOOOOOOOAAAAA NELLLLLLLLLLLLYYYYYYYYY
dot to dot is #6TDC!! Jake is wrong!!! You better make sure you have your engine is in the right position before you go any farthur. Otherwsie your gonna have valves meeting pistons when you go to fire it up.
Dot to Dot =#6TDC (like in your pictures)
Crank dot 12o'clock Cam Dot 12o'clock = #1 TDC
Dot to Dot =#6TDC (like in your pictures)
Crank dot 12o'clock Cam Dot 12o'clock = #1 TDC
what do you guys mean???? whats to laugh at?
He has the timing set at #6 right now. Look at the pictures. He even said he doesnt know what piston he has at TDC. Thats what i was explaining on why he better make sure what piston he has at TDC with the timing set the way he does
http://shbox.com/1/4th_gen_tech2.html#cam_timing
He has the timing set at #6 right now. Look at the pictures. He even said he doesnt know what piston he has at TDC. Thats what i was explaining on why he better make sure what piston he has at TDC with the timing set the way he does
http://shbox.com/1/4th_gen_tech2.html#cam_timing