What am I Missing?
12-21-2015, 09:46 PM
#11
Senior Member
Is it a tick or a knock? If all of the components have been changed with OEM parts, prior to tearing it apart, I would check the torque on the spark plugs first, if they are not torqued properly, a loose on will cause a tick that has been mis diagnosed as a phaser problem. Takes only a couple minutes to check the torque on the plugs, give it a shot first.
Tom
Tom
12-22-2015, 02:26 PM
#12
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I would say it is a loud tick. And, I will double check the torque on the plugs. We scoped the misfiring cylinder, and what little we could see looked fine. The compression of that cylinder is 160 pounds. Would a bent arm or seized lifter explain the chain jumping?
12-23-2015, 03:52 AM
#13
I posted this in another thread, but am getting kind of desperate (and discouraged) at this point, and am hoping you guys can help.
My '05 had the timing components replaced shortly before I bought it. 2600 miles later it started to tick/knock. The knock is clearly coming from just behind the right side phaser. Everything under the valve cover looks clean. It has since had the phasers, tensioners, guides, chains, and crank timing sprocket replaced with OEM parts. That didn't help anything and then it started having power issues and an occasional misfire in cylinder one. The radio had a whining static noise and then lost volume entirely (probably not related, but might be of use to diagnose). Compression in the misfiring cylinder is 160 lbs. Tried swapping the injectors -- no change. The left side was working properly -- with the phaser adjusting timing. The right side however was not advancing or retarding at all (0%). The computer was commanding the phaser, but it was not moving.
So I bought new plugs and a Melling oil pump. Pulled the covers off to notice the right chain had jumped 6 teeth and was starting to chew up the crank timing sprocket again. Got the new pump in, reset timing, and the plugs. Still knocking, the misfire is worse and it barely idles.
Any ideas? Something I am overlooking? Thanks for reading and I appreciate any advice.
My '05 had the timing components replaced shortly before I bought it. 2600 miles later it started to tick/knock. The knock is clearly coming from just behind the right side phaser. Everything under the valve cover looks clean. It has since had the phasers, tensioners, guides, chains, and crank timing sprocket replaced with OEM parts. That didn't help anything and then it started having power issues and an occasional misfire in cylinder one. The radio had a whining static noise and then lost volume entirely (probably not related, but might be of use to diagnose). Compression in the misfiring cylinder is 160 lbs. Tried swapping the injectors -- no change. The left side was working properly -- with the phaser adjusting timing. The right side however was not advancing or retarding at all (0%). The computer was commanding the phaser, but it was not moving.
So I bought new plugs and a Melling oil pump. Pulled the covers off to notice the right chain had jumped 6 teeth and was starting to chew up the crank timing sprocket again. Got the new pump in, reset timing, and the plugs. Still knocking, the misfire is worse and it barely idles.
Any ideas? Something I am overlooking? Thanks for reading and I appreciate any advice.
Good luck
12-23-2015, 03:53 AM
#14
What is the acceptable compression range on a cylinder?
12-23-2015, 10:22 AM
#15
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I took it originally to a dealership for the solenoids (said it would be about $200 to replace both). They insisted those were fine and replaced a broken guide on the right side. We inspected the solenoids when we took it apart the first time. The screens were perfectly clean. So no, those have not been replaced.
I'm not sure what the actual range is, but I believe 160 pounds is pretty darn good for 115k miles.
I'm not sure what the actual range is, but I believe 160 pounds is pretty darn good for 115k miles.
12-23-2015, 07:48 PM
#18
Senior Member
Assuming your timing was set correctly to begin with, the only way for a chain to jump 6 teeth is to have sufficient slack in the chain to do that. The only way to have that much slack is to have a bad tensioner or very low oil pressure. If your oil pressure was that low you'd been hearing other bad noises too. So to me, that leaves the tensioner as the cause of your chain slipping.
As for your other issue, I still like the phaser solenoid or seized lifter as a likely culprit. Good luck.
As for your other issue, I still like the phaser solenoid or seized lifter as a likely culprit. Good luck.
12-23-2015, 07:53 PM
#19
Senior Member
Originally Posted by LaMartian
I'm thinking a seized lifter
12-24-2015, 07:40 AM
#20
