The other day I was driving when suddenly I felt one hell of a vibration. Got out and the crank pulley on my '49 Merc. 8BA had come loose. Was able to tighten and limp home. I'm going to replace the front seal and was considering installing Speedway's crank damper while it's all apart. Anyone installed and using one?
Is this what you are considering? Notice, it's for wide belts only. Fluidampr Balancers 550203 8BA Ford Flathead Harmonic Balancer (speedwaymotors.com) You may be wasting your money as suggested here: Flathead crank pulley qun.... | The H.A.M.B. (jalopyjournal.com) Before you start spending big money, first read this Flathead crank pulley qun.... | The H.A.M.B. (jalopyjournal.com) and then find out why your crank pulley came loose. THEY SHOULDN'T COME LOOSE. According to page 72 of the 1949-51 Merc Repair Manual, Vol. 1 the Mercury CM crank pulley nut is tightened to 130-145 foot pounds. However, the 1951 Merc engine crank pulley is tightened only to 45 to 55 foot pounds. The bolt size is 5/8-18 x 1 1/8 inch long and uses a flat washer. According to this TECH Site, there is no torque specification set forth by Ford for the 1949-53 Ford 8BA engine. Flathead Torque Specifications for 1949-53 V8 (vanpeltsales.com) Also, you said that your Merc. 8BA had come loose. Does your engine have a Merc crank or a Ford 8BA crank? I have an 8BA engine with a stock 1953 Ford crankshaft in my 40 and am using a 1949-51 Merc wide belt pulley. I torque the bolt to 55 foot pounds. I use a washer. HAS NEVER COME LOOSE IN 51 YEARS. Here's some GOOD info. Technical - 8 ba ford flathead crank pulley question | The H.A.M.B. (jalopyjournal.com) Here is some very important info. that will help you. Crank pulley bolt...Lost again!! - The Ford Barn LAST THOUGHT: CHECK THE CONDITION OF YOUR MOTOR AND TRANSMISSION MOUNTS. WORN MOUNTS CAUSE VIBRATION. Finally, read everything here relating to torque. The Ford Barn - Search Results
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