Six Pack issues and rebuilding by tommyg29

4 minute(s) of a 193 minute read

Little one is fine. Should be home from NICU in about 7 days.

Tried starting it this afternoon, and it coughed and wheezed for about 1-2 minutes again. Wouldnt run.

Checked the oil among other things and found at least one and maybe two quarts of fuel in the oil, so I drained it...again.  

Also saw a small run coming from the front corner of the manifold down into the top of the valley pan  

9-7-2014

Im almost ready to throw in the towel. 

Maybe tow it to a mechanic I know to give it a shot. I doubt if he has any experience with 6 packs but he might. I know he owns a 69 camaro. 

I have drained and replaced the oil 3 times since last weekend. The crankcase keeps flooding with fuel, and the #8 cylinder keeps flooding...hydrolock...the engine stops cranking after a few seconds each time I clear the cylinders. I even have the site plug off the center carb (the outboards arent even mounted) so I know the level in the float bowl is good and Im not even touching the throttle when I crank.

I have no idea how the #8 chamber is flooding, unless the exhaust valve is failing to open at all, and how the crankcase is flooding with fuel, especially so quickly.  

I started cranking with the fuel pump OFF, and foot to the floor just to try and clear the fuel but now one last time I think Ill pull the right valve cover and check the operation of the #8 exhaust valve. 

http://s992.photobucket.com/user/trgreen/media/IMG_3466.mp4.html

LOL

I am just happy I got it idling (if you can call it that!), with everything Ive gone through here. 

Seems like its only running on about 4-6 cylinders

Ill try to spend some more time on it later in the week.

Its my old inboard that I have now rebuilt twice trying to solve this problem. I have replaced all the normal rebuild parts, plus replaced the float bowl. As you can see in the pictures, I dont even have the outboards mounted yet, but I bought two used outboards off a "running six pack" car and rebuilt them too. Turns out my "old" outboards were from a 340 car.

I will try hooking the main up to the fuel by itself to see if fuel leaks anywhere, but I dont have ANY hoses other than fuel line hooked to it for now.

The only way fuel could get into the motor would be down the throat of the manifold. I wonder if the fact a few vacuum orifices on the carb are open could be causing the problem? Or, maybe I need to mount the outboards. I read a few places not to even connect them until the center is running well, but maybe the fact they arent even mounted is leading to a hugely rich condition.....not enough air coming in?? But, I did get it running a few months ago for one trip around the block like this and it ran okay. Still blowing white smoke, but at least all eight fired and ran somewhat smoothly, and...Ive also read at least one guy recommending carb plate blockoffs for this purpose. Thats why I made a pair out of plywood