Don Jordan Posted October 3, 2011 Report Posted October 3, 2011 This should be easy. I just put new engine mounts on my 47. Is there a torque I should use? I don't want to muscle them on and wreck something but I don't want them so loose the nuts fall off. That was easy. Now that the engine is back in I'm having trouble remembering where all the little stuff goes. I was trying to find pictures of the clutch linkage but I'm not having a lot of luck. It's okay - when all else fails I'll just pull the 48 up and copy. See now that's a really good reason to have 2 cars. Quote
54Illinois Posted October 3, 2011 Report Posted October 3, 2011 I could find nothing in my Plymouth manual which covers your year. They just say not to over tighten, and some models have a washer on the left mount. Mainly for noise reduction. Quote
Don Coatney Posted October 3, 2011 Report Posted October 3, 2011 At some point in time you will get a "feel" for what will work. If I had to grab the torque wrench everytime I would still be under my car. In this case you are tightening a nut against a steel collar. I did it by feel on my car fourty thousand miles ago. Suggest you use the "feel" method and do a re-check when ever you think it is necessary. When I open the hood on my car and or crawl under it with a wrench in my hand I usually check several bolts/nuts to see what turms. A torque wrench has its place when doing engine work but for most of the rest "feel" works. Quote
Plymouthy Adams Posted October 3, 2011 Report Posted October 3, 2011 I've been told you were a touchy/feely guy Don...and for the right money I will forget who said that..!!!! Quote
Don Coatney Posted October 3, 2011 Report Posted October 3, 2011 I've been told you were a touchy/feely guy Don...and for the right money I will forget who said that..!!!! For the right money I will tell everyone you were not the guy who said that!!!!!!!!! Quote
Don Jordan Posted October 4, 2011 Author Report Posted October 4, 2011 so I guess my question is: can I over tighten? Right now I am using the "feel" method. So far the engine hasn't fallen out. Quote
Plymouthy Adams Posted October 4, 2011 Report Posted October 4, 2011 I guess you could but once the nut is run up to the point that you have reisistance due to the metal core you should then just snug it up at that point and let it ride. If you have doubt..check it after a few miles and everything has had a bitof time to settle..but I think you will find it will be good to go yet.. Quote
Don Coatney Posted October 4, 2011 Report Posted October 4, 2011 so I guess my question is: can I over tighten? If you try hard enough I am sure you can. Quote
greg g Posted October 4, 2011 Report Posted October 4, 2011 One factor that you should consider is what job the bolt is doing. Is it holding something in tension, or shear, Is it clamping two essential components together in an assembly, is that assembly stressed? Or in the case of the rear motor mounts locating and securing the assembly in which gravity is a prime player, and as they are going through an isolator, limiting movement and vibration transmitted to another assembly. As a rule of thumb you can look up torque ratings for almost any fastener all calculated on size, material, thread pitch and stretch. But in the case of the motor mounts yes they can be to tight, meaning that if you torque the assembly to much you remove the complience and isolation built into the component. The bolts job in the case is to locate the assembly and allow for the rubber to move and flex, and to limit torque rotation between the engine assembly and the frame. So with these bolts one may be workig in tension and the other working in shear depending on the load applied by the driving conditions, they can also both be working in tension and shear in emergency braking situations. When I put mine in, I ran them snug and did another half turn. As Don said sometime having calibrated fingers, wrists, and biceps can tell you more than the click of a torque wrench. Quote
fedoragent Posted January 2, 2012 Report Posted January 2, 2012 Don Coatney or Jordan, Where did you folks purchase your rear motor mounts? Roberts Motor Parts? I looked at my car yesterday and my mounts look like...well...pancakes. Thanks ahead of time, Jon Quote
Don Coatney Posted January 2, 2012 Report Posted January 2, 2012 I bought my new rear engine mounts on the bay about ten years ago. Have you tried Terrell machine in Texas? There contact information can be found in the links section of the main webpage supporting this forum. If I recall I bought my front engine mount from them. Quote
BobT-47P15 Posted January 2, 2012 Report Posted January 2, 2012 These rear mounts are on ebay currently...........$29.75 "buy it now". Seller says "fresh rubber". Link to ad: http://www.ebay.com/itm/Motor-Mounts-Plymouth-1939-1940-1941-1942-1946-1947-Value-Low-/330664821448?pt=Vintage_Car_Truck_Parts_Accessories&vxp=mtr&hash=item4cfd28c2c8 Quote
fedoragent Posted January 3, 2012 Report Posted January 3, 2012 These rear mounts are on ebay currently...........$29.75 "buy it now".Seller says "fresh rubber". Link to ad: http://www.ebay.com/itm/Motor-Mounts-Plymouth-1939-1940-1941-1942-1946-1947-Value-Low-/330664821448?pt=Vintage_Car_Truck_Parts_Accessories&vxp=mtr&hash=item4cfd28c2c8 Bought them. Thanks gents! Jon Quote
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