I am putting together a 65-chevy 327 can you tell me the proper procedure to install the harmonic balancer on the crank with no threaded hole. thanks
Country: United States
Hi, I am a professional certified mechanic, with an engineering background, and 35+ years experience. I will do my best to assist you. At Just Answer the deposit you pay is not payment to the Expert, I only get paid if you click on accept, we receive no other pay. I don't know if you are a pro or a novice so we may have to fine tune the answer. I only know as much about your problem as you have told me in your post, so my answer will be based on what you have posted. Feel free to add any additional info you feel is needed. If you are satisfied with the answer, and feel you can leave a positive feedback please click on accept. I don't get paid unless you do. There was a tool sold years ago to install these, but I haven't seen one for sale in over 20 years. If the engine is in the vehicle and assembled there is no way to accurately drill a hole and tap it, but if the engine is out and apart you can have a machinist drill and tap a 7/16 20 threaded hole , and pull the balancer on with a bolt.
Other than that my favorite way to install them is to put the balancer in a normal oven set on 200 to 250 degrees and let it stay for at least 30 minutes. The heat makes it expand a few thousandths of an inch. Then I like to get a block of dry ice and place it on the front of the crank, and hold it on for about 5 minutes, hold it with thick gloves, or a tool, be careful it can burn you. Don't wrap it with a rag to hold it on it will get the front seal too cold and make it brittle, then it will crack when you try to slide the balancer on. The dry ice shrinks the crank a few thousandths of an inch. Then have a block of wood handy, grab the hot balancer, and try to push it on. If you heat the balancer, and cool the crank, sometimes they will push right on, but you might have to drive it on. Use a block of wood, like a 4 x 4 and only apply pressure to the center of the balancer, don't apply any pressure to the outer ring. Drive it on with a LARGE hammer.
I have seen dozens of these just driven on with a block of wood and a hammer, with no heating or cooling. It is crude but very effective. Oddly enough they stay on just fine without a bolt. If you use a block of wood, like a 4 x 4 be sure to only apply pressure to the center of the balancer, don't apply any pressure to the outer ring. The outer ring is mounted on rubber, and cam move, which you don’t want. If you cant find dry ice, heating the balancer will still help. Most large grocery stores carry dry ice. Kroger stores always have it in my area, wholesale ice cream suppliers carry it too. If you have any more questions I am here to help. Good luck, and Thanks for using Just Answer.I hope this helps, 100% satisfaction is my goal. Just Answer is here to serve you. If the answer is not clear, please let me know what additional help you need, and I will assist you further. When you're satisfied, click on the green accept button. I don't get paid unless you do. A bonus and positive feedback are always appreciated, good luck and Thanks.
I have 30 years experience repairing, restoring, and customizing cars, and pickup trucks.