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Engine Management, Fuel, Spark, EGTs, and Air/Fuel Ratios This forum includes general electrical, modification, tuning, repair, replacement, identification and restoration of all components mentioned above including SMEC, SBEC, Logic Modules, aftermarket engine management, etc. Nitrous oxide posts go in here. This is the place

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Old 01-24-2012, 10:50 AM   #16
Re: 2.7 timing chain install  
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I've completed the timing chain install and all the marks line up. So I figured I'd turn the crankshaft a couple of rotations with a wrench on the crankshaft to make sure any slack worked its way out. Problem is it will only turn about 1/4 turn and seems to stop short. I'm afraid to force it. What did I do wrong?
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Old 01-24-2012, 01:32 PM   #17
Re: 2.7 timing chain install  
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I've completed the timing chain install and all the marks line up. So I figured I'd turn the crankshaft a couple of rotations with a wrench on the crankshaft to make sure any slack worked its way out. Problem is it will only turn about 1/4 turn and seems to stop short. I'm afraid to force it. What did I do wrong?
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Old 01-24-2012, 06:53 PM   #18
Re: 2.7 timing chain install  
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John
I took your advice and tried turning the crankshaft after I installed the timing chain. Unfortunately it won’t turn. It rotates about 1/4 turn in each direction then stops abruptly. What could I have done wrong. I'm totally stumped and dejected. Thanks
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Old 01-25-2012, 06:03 AM   #19
Re: 2.7 timing chain install  
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Just saw this thread, are you still having issues with the chain/mark alignment?
Are you replacing all chains?
My Son just replaced the water pump on his wifes 02 Concorde 2.7L and only had to replace a faulty primary chain tensioner.
If you are only dealing with the primary chain i can get you info.
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Old 01-25-2012, 10:38 PM   #20
Re: 2.7 timing chain install  
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Yes just the primary. I have the marks on the chain matched to the marks on the 3 gears but engine will not turn more than 1/4 revolution. By the way what direction does the engine turn. The manual says clockwise but doesn't state the orientation. Is it clockwise when siting in the car looking forward or when looking at the engine from the front.

Any advice would be greatly appreciated. Every night my wife hounds me to by a new car. Thanks Chris
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Old 01-25-2012, 11:36 PM   #21
Re: 2.7 timing chain install  
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sounds like you may be looking at the wrong marks because your hitting valves. Maybe NAJ can find the timing info on it.
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Old 01-26-2012, 07:27 AM   #22
Re: 2.7 timing chain install  
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He had help getting the timing correct.
He works with a guy that was a Chrysler tech for 31 years.
My Son had his apart twice so he should now be familiar with it,once for the pump and immediately again after starting the car to replace the primary chain tensioner that was faulty(plunger jammed in bore) appearently you should just replace the tensioner to avoid this problem.

I do know that they said getting the timing right is a 2 man job.
I will talk to my Son but he has school tonight so will not be until tomorrow.

What manual are you using?
Mitchell shows all the diagrams so I can send those to you if you need them.
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Old 01-26-2012, 02:00 PM   #23
Re: 2.7 timing chain install  
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I have the dodge SM. I know I messed up the valve timing somehow. Now I have the right side correct with the 12 pins between marks on the cam gear and the timing chain gear mark at 90 degrees to the head when the #1 is at TDC. The SM is little vague at this point. It seems to say the left side shold be in the same position at that time (gear mark at 90 degrees and 12 pinns between the marks on the cam gears but I dont see how that is possable. Do they mean to rotate the engine until the left timing gear mark is at 90 degrees to the head and then there should be 12 pinns between the cam gear marks? I can get it to that point. So in other words the left side cam timing is set when the #1 is no longer at TDC.

Thanks Chris
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Old 01-26-2012, 06:13 PM   #24
Re: 2.7 timing chain install  
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I will have to take a look at Mitchell to see what they are saying and talk to my Son and possibly his co-worker.
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Old 01-26-2012, 06:34 PM   #25
Re: 2.7 timing chain install  
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Old 01-28-2012, 08:02 PM   #26
Re: 2.7 timing chain install  
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My dad contacted me about your problem. First thing is it took two of us to put the primary chain on (could of used three). When you remove the tension on the chain and remove guides, the cam close the valves on cyl #1, making it at TDC, not at 60 BTDC as stated in earlier posts. Therefore you will need to make sure that all your marks are correctly aligned. So when you install the chain you need to turn the cam back (counter clockwise as you are looking at it), not alot just to get back to correct marks.

Now, are you able to turn the motor over by hand yet? It rotates clockwise as if you are looking from the front to the back (righty tighty, lefty loosey) if that helps. If you can turn it over, you are able to get the links that are coded/colored differently lined back up. It took me about 100 full complete turns of eng to do this prior to me taking everything off again, (wanted to make sure that it was actually the tensioner that was bad and not off a tooth).
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Old 01-31-2012, 08:27 PM   #27
Re: 2.7 timing chain install  
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I got it together. I thought I was able to time the cams by positioning the cam gear dimples at 90 degrees and counting the 13 links when the #1 was at TDC. I then determined the reason I couldn’t match the colored links to the marks because was I was using the wrong mark on the crank shaft sprocket. I was using a small mark on the inside of the gear but I then decided it must be the long groove that goes across the entire outside with of the sprocket and that worked. I dont see a 1/2 moon mark like in the SM picture you attached. And I was then able to crank the engine by hand. Unfortunately it didn’t start. It tried a little but didn’t catch. I'm not sure now if I'm off a link or maybe I damaged a valve when I was trying to rotate the engine when the cam timing was off. I had a ratchet on the crankshaft bolt and put some pressure on it but never really forced it. Could that have done enough to prevent it from starting? What shpould I try now? Compression test? Thanks so much for your help.
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Old 01-31-2012, 09:27 PM   #28
Re: 2.7 timing chain install  
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First check to make sure that you connected all wiring, the cam sensor that goes into the driverside head (front). And if you disconnected the wiring harness or connectors that are behind the valve covers (hard to see and easily forgetful, I think the crank sensor is back there as well (about a 1-1/2 ft long wire I almost missed this on mine, driverside head in back). Not sure what you mean by half moon, (if its the triangle part your looking for, its on the block, hard to tell from up top, lift up A/C condensor and look with flash light.

Now all this is if you took everthing apart again as far as the timing chain cover, valve covers and upper plentinum, and radiator.

You mention that it turns over, but won't start. If you have a scan tool, check for fault codes. Also check spark on a cylinder before you start a compression test.

Keep us informed of your progress.
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