2005 Chrysler 300 2.7 liter trouble with the setting of the timing chain
I have been trying to help this shop for some time to solve this 2.7 with a lack of power and no codes. Original complaint was lack of power and P0016, a correlation code. The tech replaced the timing chain and lined up the marks per the paint marks and service information. I've attached the data capture of the cam offset on the vehicle post repair, including the camshaft correlation captures of CMP and CKP along with a known good. Our latest attempt has been to synch it as well as possible using the scope pattern rather than the marks. I don't know if that will fix it, but I'm wondering what would cause the mis-synchronization in spite of the correct setting of the gears. Note that where I have the CMP CKP waveform now is absolute as close as I can get it.
When you install the chain you need to leave the passenger side valve cover off and hold chain guide with a pry bar until tensioner pumps up while cranking it. They Make a thing called a stop block you put next to tensioner to hold guide also. I think Oreillys sells it. I think the 3 pulses on cam are centered in gap.
Did you or technician matched the new cam sprockets to old ones? I had a similar problem once and it was the aftermarket timing set , the cam sprockets had different gaps for cam sensor
Disable the ignition or fuel and the let the engine crank to build up oil pressure.
OE chains and gears? If not, then start over. Other possibility is "history" you are unaware of, and engine is actually the wrong 2.7 for the exact Y/M/M. Chrysler changed random things, like tooth spacing, randomly, from my perspective. (I'm sure it made sense to some accountant at the time) Also, is this one where the tone wheel can slip?
Hey, Geoff. Riveted tone wheel, but certainly still possible that aftermarket gear set is wrong, though all seems to match OE. History unknown and you are certainly right about Chrysler motor configuration problems. I remember a case history on a used motor install that would never start due to a tone wheel mismatch.
In some cases Philip, Chrysler changed the cam gears depending on the computer used SBEC or NGC
Hi Phil, Do you have before the repair waveforms? Did they or you compare the new parts to the old parts? Have you verified the parts are correct? Eric
Hi, Eric. This is a job done by another shop and I was asked to help out. Yes, we did compare the old and new parts and other than some serious stretch in the old chain, everything matches up. The only thing that might be different is the paint marks for there is no paint left on the old chain. I'm not doing any of the R & R, just telling the tech "move the chain one tooth this way" and then…
I think you either; reply to yourself, up in the first post, or you can edit that post and change it to resolved. Or both.
Friends, The shop doing the work on this vehicle has surrendered. After my last attempt at setting the chain just using the lab scope, reassembly did not result in success. The vehicle was shipped in an unrepaired state. I was hoping at least he would let me get another capture of the CMP/CKP relationship and the data but no such luck. My guess is that there is an anomaly with the parts used…