I'm a newbie and a lurker here. I bought my 47 Special Deluxe coupe with stock flathead six last fall. It has been sitting at my sons house since then as I have had no time or room to work on it. Went yesterday to pull the spark plugs and pour some 'miracle' oil into the cylinders to see if I could get the motor unstuck. What I found has me baffled. All of the pistons were at or near TDC. I can't figure out what kind of catastrophic failure would have caused this. There is oil in the crankcase which looks unadulterated. And there does not seem to be any windows in the block. Any ideas?
This was a bit of an impulse buy of a model that I have liked a lot since my high school days back in the 60's. I may end up selling it as it may be a bit more of a project than I want right now. I have a 63 Plymouth project and a VW Beetle project (for my wife) that are filling the garage right now.
Thanks for any advice.
The best way to unstick a inline flathead engine is to remove the valve covers on the side to close all the valves,pull the plugs,and fill each cylinder with carb cleaner.
Start at number 1 and screw one of of those "hold valve open" devices people use to change valve springs on OHV engines into the head,and then hook a air hose to it and pump up as much air pressure in the engine as you can get. Remove the oil fill cover and just sit there and wait until you hear "glub,glub,glub" noises coming from the oil pan. That is air going past the rings. Disconnect the air hose and then fill that same cylinder with WD-40 or some other light penetrating oil,and repeat with the air pressure until you hear the glub noises again. The purpose of this is to lube up your cylinder walls and rings so they don't gall when you try to turn the engine over.
Then go to number 2 and repeat.
Once you have done with with all 6 cylinders,you can usually put a wrench on the crank nut and turn the engine over. If not,"bumping" the starter will do it. Just "bump" it a very slight amount to break it loose.
Next step is to find the piston at TDC or closest to it,and adjust the valves on that cylinder. Then go to the next one that is closest to TDC and turn the crank nut with a wrench until it is at TDC and adjust those valves.
Repeat until all the valves are adjusted.
Once you ahve done that you can drain all the carb cleaner,WD-40,and old oil out of the engine,replace it with fresh 30 wt non-detergent oil and then use the starter to spin the engine over 10 seconds or so at a time until you build up oil pressure.
Once this is done you are ready to put the plugs back in it and fire it up.
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