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Hard Luck · 03-30-2010, 05:04 AM

Pretty cool. Looks like you got a whole car family there. You have been doing nice work.

About the inline you are working on now. Take it slow and check your work. Did you pull off the timing cover and check the gears? With some of the problems you are having, pull off the side covers and check the puch rods. You should be able to rotate them slightly with the valve closed, if not, the rockets are too tight.

Next is the ignition. If you at TDC on #1 and have the rotor pointed dead at that cyl to fire, that is a 0 degree advance. I do not know any engines that run at 0. That is also why you get a backfire through the carb. The mix is igniting too soon and the intake valve is still open. That would indicate the timing should be retarted.

Lastly, how did you unstick the valves? If you left the head assembled and cleaned them that way, they may not be sealing. If you dissasemble the heads, clean and slightly polish the valve stems, and have the valve seats checked (make sure none are loose or are not allowing the valves to close because of the heavy carbon deposits [the junk you found at the top of the pistons]) that would ensure the head is good to go. You may not need to do all of this, but if you do, now you know.

Just keep up the good work. The good thing is you have a few projects, if you get too frustated with this engine, spend some time on the truck, or suspension on the car, or whatever. Just take a break from it for a little bit. Think about the problem and do a little research and attack it again with a cool head.

03-30-2010, 05:04 AM	#427
Hard Luck I've got grease on my mind. Join Date: Sep 2007 Location: Oly, Wa Posts: 481	Re: Project' 69 c10 aka sin. Pretty cool. Looks like you got a whole car family there. You have been doing nice work. About the inline you are working on now. Take it slow and check your work. Did you pull off the timing cover and check the gears? With some of the problems you are having, pull off the side covers and check the puch rods. You should be able to rotate them slightly with the valve closed, if not, the rockets are too tight. Next is the ignition. If you at TDC on #1 and have the rotor pointed dead at that cyl to fire, that is a 0 degree advance. I do not know any engines that run at 0. That is also why you get a backfire through the carb. The mix is igniting too soon and the intake valve is still open. That would indicate the timing should be retarted. Lastly, how did you unstick the valves? If you left the head assembled and cleaned them that way, they may not be sealing. If you dissasemble the heads, clean and slightly polish the valve stems, and have the valve seats checked (make sure none are loose or are not allowing the valves to close because of the heavy carbon deposits [the junk you found at the top of the pistons]) that would ensure the head is good to go. You may not need to do all of this, but if you do, now you know. Just keep up the good work. The good thing is you have a few projects, if you get too frustated with this engine, spend some time on the truck, or suspension on the car, or whatever. Just take a break from it for a little bit. Think about the problem and do a little research and attack it again with a cool head.