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johnbuckley · 12-20-2013, 04:24 AM

On an unknown engine (of any make) I find the simplest way of finding tdc is to slacken off the number 1 plug slightly and then a paint a bit of soapy water around it. Great fun watching the bubbles on compression inflate and deflate as it passes when turning it by hand and never fails.

12-20-2013, 04:24 AM	#2
johnbuckley Senior Member Join Date: Jul 2010 Location: United Kingdom Posts: 1,556	Re: Model A engine timing for a new guy On an unknown engine (of any make) I find the simplest way of finding tdc is to slacken off the number 1 plug slightly and then a paint a bit of soapy water around it. Great fun watching the bubbles on compression inflate and deflate as it passes when turning it by hand and never fails.