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Posted By Discussion Topic: Clutch -- page: 1 2     engine 12-23-2017 @ 3:23 PM reply profile send p.m. New Member Posts: 103 Joined: Dec 2012 Here is the update on my vibration problem. I got another flywheel from Tom O and a new clutch and had them balanced. I pulled the engine and put on the new flywheel and clutch and reinstalled the engine. I started it up and the vibration is gone. I suspect that the flywheel was the problem at this point all along. I am just glad that this has finally been resolved. Thanks to everyone engine 09-26-2017 @ 1:53 PM reply profile send p.m. New Member Posts: 103 Joined: Dec 2012 Well I have good news about the vibration that I was having trouble with. I loosened up the bolts for the transmission mounts and put a jack under the transmission and raised it up off of the frame and started the engine. Vibration gone, the new mounts that I have are a hard rubber and don't balloon out like the engine mounts. I will be in search of softer rubber ones. Does anyone know who may supply these? It seemed that the hard rubber just transferred the vibration to the frame. Thanks for your support. carcrazy 09-21-2017 @ 6:10 AM reply profile send p.m. Senior Posts: 1667 Joined: Oct 2009 Balancing the clutch and flywheel with the clutch disc in place could be the cause of your problem if the clutch disc wasn't centered on the flywheel at the time of the balancing operation. engine 09-21-2017 @ 5:34 AM reply profile send p.m. New Member Posts: 103 Joined: Dec 2012 I did ask if he had used the bob weights and he said that he had. Spun up the crank shaft, flywheel, and pressure plate to 4500 rpm and it was good. Pistons and rods were also weighed. engine 09-21-2017 @ 5:29 AM reply profile send p.m. New Member Posts: 103 Joined: Dec 2012 The engine rebuilder has done many of these engines from what I know. I had him do my truck engine as well. I am getting some who think that the flywheel is the problem. I am going to have to pull out the engine at this point to try to get it corrected. Thanks for your help. supereal 09-19-2017 @ 10:23 AM reply profile send p.m. Senior Posts: 6819 Joined: Oct 2009 The vibration you describe can't be generated by the mounts alone. They will transmit vibration caused by the driveline, usually from the engine. If the vibration did't change with the belt off, the problem seems to be related to internal rotating engine parts. Often we see problems in flatheads at our shop caused by the rebuilder's evident lack of information regarding tolerances which certainly differ from modern engines. engine 09-18-2017 @ 10:49 AM reply profile send p.m. New Member Posts: 103 Joined: Dec 2012 I just got back from the engine rebuilder and he thinks that the vibration is in the engine mounts. You can feel it in the floor and seat, steering wheel. Here is my next question, the rear transmission mount is the steel type that mounts to the back of the transmission and then threw the mounts to the frame. I checked to see if the 36 transmission mount would work for the 41 but was told it would not. I have put in new mounts from Drake .Some how I think that I need to isolate this at the back transmission better. Has anyone ever had this problem? engine 09-16-2017 @ 7:35 AM reply profile send p.m. New Member Posts: 103 Joined: Dec 2012 I have no idea, the shop that did the rebuilding of the engine is well known to do flat heads. As I stated before the vibration is felt in the clutch area. The flywheel is for the 11" clutch that is why it has one. It was balanced as well. I will be taking the car over next week and see if they can determine the problem. Thanks carcrazy 09-15-2017 @ 8:19 PM reply profile send p.m. Senior Posts: 1667 Joined: Oct 2009 Are the pins offset in the pistons of your engine? If so, one or more of the pistons may be installed incorrectly. engine 09-15-2017 @ 1:55 PM reply profile send p.m. New Member Posts: 103 Joined: Dec 2012 I had taken the belt off as well as the fan , the engine shook more before it was rebuilt but it still has the vibration. I will be taking the car to the engine rebuilder next week and have him see what he thinks. I will ask him about the bob weight, good to know. I just thought that maybe the 11" clutch might have caused it but the trucks had it also with the same engine. Thanks for all your thoughts. The generators ok.

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