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Old 10-20-2020, 10:09 AM   #17
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Join Date: Jun 2010
Location: San Antonio, Texas
Posts: 12,175
Default Re: Time lapse Model A engine build

Ford turned their engines with large electric motors to bed them in. The motor circuit had a large amp meter that employees on the run in line would monitor to make sure that the current dropped to a specific range of amps that indicated that the engine was indeed ready for service and could be sent on to the different assembly lines there and around the country. This also gave them a chance to check for coolant system leaks and lubrication system function & leakage. If an engine took too many amps to turn or not enough then it was set aside for further repair evaluation.

I don't know how tight they were to start or what was considered acceptable but they undoubtedly had limitations to go by.

Most rebuilders set them up to where they can be started and run on a test stand to insure a unit will work for the customer. I'd say it was set up tighter than what most rebuilders would consider as normal if the starter wouldn't turn it over. Lubricant has to have a clearance to do it's job. The clearance should not have to be "opened up" by turning a crank in a too tight no clearance situation. The clearance can be kept to a minimum if proper machining practices are followed. Bedding in processes should smooth out minute high spots in a bearing surface rather than actually opening up a clearance that was not there to begin with.

I've seen so many reality TV productions that just have to add drama that I tend to avoid them like the plague whether they are about cars, motorcycles, or just life in general.

Last edited by rotorwrench; 10-20-2020 at 10:30 AM.
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