Knock/tick when sitting still.

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   not sure if this needs to go in engine or trans....so I'll start here in the engine forum!
65 classic. 232 auto. 

When the car warms up I get a tick or maybe even a knock. Doesn't matter if it's in park or in gear. Seems to be coming more from the passenger side of the motor, low, near where the trans bolts up.

Goes away under any kind of throttle. 

The only thing that makes sense would be possibly the torque converter bolts being loose...but it really sounds more like a faint lower end knock. 

Any thoughts or ideas?

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DocLong Members Profile Send Private Message Find Members Posts Add to Buddy List AMC Apprentice Joined: Mar/02/2019 Location: Dayton, Ohio Status: Offline Points: 89	Post Options Post Reply Quote DocLong Report Post Thanks(0) Quote Reply Topic: Knock/tick when sitting still. Posted: Jul/15/2019 at 6:35pm
	not sure if this needs to go in engine or trans....so I'll start here in the engine forum! 65 classic. 232 auto. When the car warms up I get a tick or maybe even a knock. Doesn't matter if it's in park or in gear. Seems to be coming more from the passenger side of the motor, low, near where the trans bolts up. Goes away under any kind of throttle. The only thing that makes sense would be possibly the torque converter bolts being loose...but it really sounds more like a faint lower end knock. Any thoughts or ideas?

FSJunkie Members Profile Send Private Message Find Members Posts Add to Buddy List AMC Addicted Joined: Jan/09/2011 Location: Flagstaff, AZ Status: Offline Points: 4742	Post Options Post Reply Quote FSJunkie Report Post Thanks(0) Quote Reply Posted: Jul/17/2019 at 3:06am
	Every AMC six with an automatic transmission, whether 232, 258, or 4.0L, that I have installed makes that noise and they continue making that noise for 100,000 miles. I have no idea what causes it. I've checked bolts, I've checked alignment, I've tried changing the clocking on the torque converter, I've replaced the flex plate. I've never had it on any engine except AMC sixes. I hate it because people keep hearing it and saying things to me about it.
	1955 Packard 1966 Marlin 1972 Wagoneer 1973 Ambassador 1977 Hornet 1982 Concord D/L 1984 Eagle Limited

farna Members Profile Send Private Message Find Members Posts Add to Buddy List Supporter of TheAMCForum Moderator Lost Dealership Project Joined: Jul/08/2007 Location: South Carolina Status: Offline Points: 19676	Post Options Post Reply Quote farna Report Post Thanks(0) Quote Reply Posted: Jul/17/2019 at 7:00am
	Check all the bolts, then drive it. If it was a rod bearing the tick wouldn't go away with rpm, it would get worse. Since this is a shaft rocker motor, check oiling to the head. You should have a little oil draining from the back of the rocker shaft after a few minutes of idling. Might not be a lot, but should be a steady trickle at least. Take the valve cover off then crank it up -- won't spit oil everywhere, just dribble out the rear of the shaft (and maybe the front too). If you're not getting much oil out of the shaft check this out: http://www.mattsoldcars.com/RestoreAmerican/boltmod.shtml If the engine has been well maintained all it's life with regular oil changes you may not have an issue. Most haven't, or sitting up leaves sludge in the oil passage to the head. sometimes a good engine oil flush will fix the issue, but I recommend the head bolt mod just to be sure.
	Frank Swygert

vinny Members Profile Send Private Message Find Members Posts Add to Buddy List Supporter of TheAMCForum Joined: Jan/05/2012 Location: Calgary Status: Offline Points: 2837	Post Options Post Reply Quote vinny Report Post Thanks(0) Quote Reply Posted: Jul/17/2019 at 5:02pm
	If you can see oil with the oil filler cap off you should be OK but I bet you won't.

DocLong Members Profile Send Private Message Find Members Posts Add to Buddy List AMC Apprentice Joined: Mar/02/2019 Location: Dayton, Ohio Status: Offline Points: 89	Post Options Post Reply Quote DocLong Report Post Thanks(0) Quote Reply Posted: Jul/17/2019 at 9:34pm
	So when I got the car it had sat for a couple decades. It would only idle and would make an awful racket. I pulled the shaft and cleaned everything and in the process found 4 s shaped pushrods. They were replaced with melling parts and everything was reassembled. I started it up and was getting plenty of oil up top. That was 500 miles ago...in that time I've done a NOS carb, rebuilt fuel pump, restored gas tank and about 4 oil changes. I can still see plenty of oil when I remove the filler cap so I don't believe that's a problem. It really doesn't sound like a rod knock, more of a wobble. It's definitely low on the passenger side of the motor about where the trans meets the engine.

vinny Members Profile Send Private Message Find Members Posts Add to Buddy List Supporter of TheAMCForum Joined: Jan/05/2012 Location: Calgary Status: Offline Points: 2837	Post Options Post Reply Quote vinny Report Post Thanks(0) Quote Reply Posted: Jul/17/2019 at 10:38pm
	The flex plate that the T/C gets bolted to is prone to cracking. I have a spare T/C that is really worn on the shaft part that goes into the transmission. I never saw it run so don't know if that would cause a noise.