2.0L LNF Performance Tech 260hp and 260 lb-ft of torque Turbocharged tuner version.

taking off valve cover tomorrow

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Old 04-13-2012, 11:23 PM
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taking off valve cover tomorrow

well im taking off the valve cover tomorrow to see what ticking under there, got everything ready today, took apart and disconnected everything that needed to be, dont know why when i look at it it looks so hard, its pretty easy. got that stupid stainless line off on the turbo side, made my own make shift tool from a worm clamp, yup popped right off, may try it on the valve cover side as well see what it do. anyway will update on what i find.
Old 04-14-2012, 01:45 AM
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If you don't see anything apparent, check the torque on our cam journal bolts.
Old 04-14-2012, 03:45 AM
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k thanks man
Old 04-14-2012, 01:34 PM
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Done yet, Tom?
Old 04-14-2012, 02:52 PM
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Originally Posted by SSlobalt
Done yet, Tom?
yes i have it apart, quick answer, all i see, the timeing chain is a little dangly, should it have some slack or should it be tight? im thinking that may be my problem
Old 04-14-2012, 03:04 PM
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Sorry to let you down, Tom, but I don't really know the answer to that one. If it's your tensioner, it's really important not to run it like that. PM FasterisBetter. He just had this issue and can better answer your question.
Old 04-14-2012, 03:20 PM
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Originally Posted by tomj77
yes i have it apart, quick answer, all i see, the timeing chain is a little dangly, should it have some slack or should it be tight? im thinking that may be my problem
Yeah man. Your timing chain tensioner has probably blown the o-ring out of the tensioner or one of your guides is damaged, but I'd say that your tensioner is bad. They cost around $56 at the dealer and they actually have these in stock usually as all ecotecs in cobalts use the same tensioner.
Old 04-14-2012, 03:22 PM
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The tensioner tensions off oil pressure I believe. So if the car isn't running it will most likely have slack in it if thats the case.
Old 04-14-2012, 03:23 PM
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the tensioner should be relatively tight but is driven from oil pressure..... however they do go bad from time to time and if you have bolt ons or more then stock power levels its always good to have a brand new spare floating around somewhere. if the cars not running it wont be super tight. but it shouldnt have a ton of play either.

cam journals i have seen. cam journals i notice when they are loose mostly happen on decel rather then accel.
Old 04-14-2012, 03:29 PM
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well idk other than the tensioner, everything else under the cover looks good. the tick comes pretty much from the timing chain area, the top guide looks fine, the bottom idk how to check that. chain has about almost an inch of play. which id think would be bad, but i dont know anything about timing chains, this is the first time iv opened a motor. do u just unscrew the tentioner? pull it out and check?
Old 04-14-2012, 03:32 PM
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yeah it just unscrews
Old 04-14-2012, 03:34 PM
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ill post vid of how loose it is hold on
Old 04-14-2012, 03:51 PM
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here is this to loose

IMG 0302 - YouTube
Old 04-14-2012, 04:01 PM
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Pull off the guide and show us how much it moves, its excessively loose from what I can see.
Old 04-14-2012, 04:01 PM
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yea mine didnt look like that.I just took off my cover 2 hours ago
Old 04-14-2012, 04:22 PM
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well i got the cover back on now, so i cant. if u say its to loose ill by a new tesioner. but the guide was blocking it from moving quite a bit more from what i could tell. i it would have gone above where the top of the guide sits.
Old 04-14-2012, 04:33 PM
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oh and for those who say the hose on the turbo to the valve cover is the correct crank vent to put the catch can on, not true, it just goes into the valve cover venting in there, the on that doesnt go to the turbo goes straight down to the block, i looked, that is the correct one. but both can get oil threw em so technically should probably run 2 catch cans
Old 04-14-2012, 04:50 PM
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Originally Posted by tomj77
oh and for those who say the hose on the turbo to the valve cover is the correct crank vent to put the catch can on, not true, it just goes into the valve cover venting in there, the on that doesnt go to the turbo goes straight down to the block, i looked, that is the correct one. but both can get oil threw em so technically should probably run 2 catch cans
Idk what you're talking about. There isn't any crankcase ventilation lines that run to the block. Theres one that runs to the turbo and one that runs to the intake. The one that runs to the turbo is where you splice the catchcan in.
Old 04-14-2012, 04:58 PM
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i wouldnt say the slack looks 100% abormal but it looks like enough to maybe be a problem. did you check the cam journals.
Old 04-14-2012, 05:26 PM
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Originally Posted by FasterIsBetter
Idk what you're talking about. There isn't any crankcase ventilation lines that run to the block. Theres one that runs to the turbo and one that runs to the intake. The one that runs to the turbo is where you splice the catchcan in.
no the one that usually runs to the intake, if u take the valve cover off, its has gasket all around it and there is a hole that goes down through the head.
Old 04-14-2012, 05:27 PM
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Originally Posted by Omiotek
i wouldnt say the slack looks 100% abormal but it looks like enough to maybe be a problem. did you check the cam journals.
they look ok, and bolts seemed tight, didnt check the torque on them though, first timer, forgot. lol i applied some presure and they didnt budge.
Old 04-14-2012, 05:31 PM
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so then what? i start with the tentioner? when i take it apart again to change that ill make sure i take a good look and check torque on journey bolts. but for now ill order a tentioner. either way if its not that ill have one for spare. and dealer did have a look, dont think they looked at the chain, but they said everything else under there looked fine. they wanted to take the head off and look at my valves, but the meth kit made them not, cause they didnt want to void warrenty if they found the meth damaged valves, which is kinda gay cause alot of people run it without issue
Old 04-14-2012, 05:52 PM
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I heard some welding in the background.
Old 04-14-2012, 06:26 PM
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ya my bro in law and my dad were just outside the shop making a trailer to pull deer out of the bush

Originally Posted by SSlobalt
I heard some welding in the background.
any input??

Last edited by tomj77; 04-14-2012 at 06:26 PM. Reason: Automerged Doublepost
Old 04-14-2012, 09:14 PM
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You're beyond my expertise right now. I have not dealt with the tensioner before. One member on here has been through 3 of them, but I can't remember who it was (Maybe Cuda Joe or cmiller). That's who you need to talk to if you can search and find it. Sometimes, the only way to tell if a part is bad is to pull it and check it, or just replace it.


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