The Ford Barn - View Single Post - No. 7 Cyl never gives evidence of a power stroke on '46 Flathead

flatheadmurre · 04-02-2017, 10:14 AM

You get good compression with the horseshoeclip missing on the valve assembly.
but on the intake stroke it suck exhaust into the cylinder lifting the guide and valve and doesn´t fire.
That´s why i asked if the plug got real wet from fuel as it should....
Same for taking a leakdown test, looks great but the valve is not going to do it´s job when running.
Take the intake off and have a peak...don´t take that long if the plug doesn´t get wet.
Run one known good cylinder and the suspect one without ignition cables attached then compare them, if the suspect seems dry in comparsion...

04-02-2017, 10:14 AM	#45
flatheadmurre Senior Member Join Date: Apr 2015 Location: Sweden Posts: 3,045	Re: No. 7 Cyl never gives evidence of a power stroke on '46 Flathead You get good compression with the horseshoeclip missing on the valve assembly. but on the intake stroke it suck exhaust into the cylinder lifting the guide and valve and doesn´t fire. That´s why i asked if the plug got real wet from fuel as it should.... Same for taking a leakdown test, looks great but the valve is not going to do it´s job when running. Take the intake off and have a peak...don´t take that long if the plug doesn´t get wet. Run one known good cylinder and the suspect one without ignition cables attached then compare them, if the suspect seems dry in comparsion...