Timing Marks ??????
07-09-2010, 01:11 PM
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Timing Marks ??????
aight guys so i'm building my lnf, i'm puttin the timing chain for the cams back and and i notice on my outer crank gear there is no dot for the lower link??? i see a small black plastic cover on that ring with a couple dots but nothing as i've seen in all the all data or researches, other than the two larger dots on the inner crank gear, anybody have any clue or can point me in the right direction of figuring this out??? if i can i'll post pictures soon i'm here at work right now, Thanks!!!!
07-09-2010, 06:04 PM
#3
There was marks when we did mine. Here ya go
Note:
• There are 3 colored links on the timing chain. Two links are of matching color, and 1 link is of a unique color. Use the following procedure to line up the links with the actuators. Orient the chain so that the colored links are visible.
• Always use new actuator bolts.
•Assemble the intake camshaft actuator into the timing chain with the timing mark lined up with the uniquely colored link (1).
•Lower the timing chain through the opening in the cylinder head. Use care to ensure that the chain goes around both sides of the cylinder block bosses (1, 2).
•Install the intake camshaft actuator onto the intake camshaft while aligning the dowel pin into the camshaft slot.
•Hand tighten the new intake camshaft actuator bolt.
•Route the timing chain around the crankshaft sprocket and line up the first matching colored link with the timing mark on the crankshaft sprocket, in approximately the 5 o'clock position.
edit. Well there was pictures in here. But there is a dot on the crankshaft gear that should line up against one of the colored links on the chain.
Note:
• There are 3 colored links on the timing chain. Two links are of matching color, and 1 link is of a unique color. Use the following procedure to line up the links with the actuators. Orient the chain so that the colored links are visible.
• Always use new actuator bolts.
•Assemble the intake camshaft actuator into the timing chain with the timing mark lined up with the uniquely colored link (1).
•Lower the timing chain through the opening in the cylinder head. Use care to ensure that the chain goes around both sides of the cylinder block bosses (1, 2).
•Install the intake camshaft actuator onto the intake camshaft while aligning the dowel pin into the camshaft slot.
•Hand tighten the new intake camshaft actuator bolt.
•Route the timing chain around the crankshaft sprocket and line up the first matching colored link with the timing mark on the crankshaft sprocket, in approximately the 5 o'clock position.
edit. Well there was pictures in here. But there is a dot on the crankshaft gear that should line up against one of the colored links on the chain.
Last edited by cmiller8006; 07-09-2010 at 06:05 PM. Reason: Automerged Doublepost
07-09-2010, 07:04 PM
#4
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thank you sir, ya i'm not too sure why mine doesn't have any its kinda trippin me out its a mid 08 model so i'm not too sure if thats got something to do with it, during this step your crank was at TDC correct??
10-18-2012, 01:39 PM
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sorry about bringing this up again but doing this method will have the engine IN TIME correct? Thanks guys doing this again myself. and is there anyway possible to guarantee the chain to not jump the first time you start the motor?
10-18-2012, 07:38 PM
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I just recently did this myself. The crank gear has a little metal shim on it that you can remove with a pic to expose the timing mark (Thanks Matt from ZZP for that one!!).
So long as you follow the instructions and sinch up the chain before you put it all back together, it won't skip. You difinitely need to rotate the intake cam a bit to tighten it up once its all on there. Once its all bolted down and you have the chain tensioner properly engaged (by tapping on the chain right where the tensioner meets the plastic chain guide. I used a 20" extension and a rubber mallet.) it wil be fine.
So long as you follow the instructions and sinch up the chain before you put it all back together, it won't skip. You difinitely need to rotate the intake cam a bit to tighten it up once its all on there. Once its all bolted down and you have the chain tensioner properly engaged (by tapping on the chain right where the tensioner meets the plastic chain guide. I used a 20" extension and a rubber mallet.) it wil be fine.
10-21-2012, 03:43 PM
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Im planing on doing this soon too I have a 09 SS LNF and need some help on a rebuild manual for this eng. and some what not to do bc im a newbe to this eng and cant find anything for a rebuild how to.
10-21-2012, 04:36 PM
#13
no offense..... anyone who doesnt know this stuff or doesnt have a service manual involving the motor really should get them selves a helping hand from someone whos done a couple of these.
they arent hard motors to mess with by all means but every precautions needs to be taken before you ruin something. your best bet it to pick up the cobalt service manual or kappa service manual for your year and go through it.
they arent hard motors to mess with by all means but every precautions needs to be taken before you ruin something. your best bet it to pick up the cobalt service manual or kappa service manual for your year and go through it.
12-09-2017, 01:13 PM
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Has anyone had a problem with too much slack on the timing chain between cam gears. I am building a 09 vvt 2.0 and have the new revised tensioner and everything is were it should be amd tensioner being released but i still get a good amount of slack in between my cam gears . it would mean alot to get some info on this thanx
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