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Stuck Motor


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14 replies to this topic

#1 47Mopey63

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Posted 21 July 2013 - 07:21 AM

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.

 

Paul



#2 Silverdome

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Posted 21 July 2013 - 07:48 AM

Possibly someone dropped the oil pan and disconnected the rods. I'd drop the pan and take a look.



#3 Young Ed

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Posted 21 July 2013 - 08:43 AM

How did you see the pistons? Are you sure you weren't seeing valves or something else?


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#4 JerseyHarold

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Posted 21 July 2013 - 09:02 AM

Welcome to the forum.

 

The "valve deck" is directly under the spark plug holes in these engines, with the valves on either side of the plug hole (front to back).   The pistons are off to the driver's side of the car.  When trying to oil-up stuck pistons, it helps to have a funnel with a thin hose attached that you can snake into each cylinder through the spark plug hole.  When you probe with the hose you'll see what I'm referring to.

 

For what it's worth, several people have reported good results with a 50-50 mix of automatic transmission fluid and acetone.

 

Don't hesitate to post whatever questions you have.  The collective knowledge here is huge!



#5 seabee1950

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    I want it done but that takes time and I didn't buy it to make money this is a project and if I get it done then it will be my cruiser.

Posted 21 July 2013 - 09:09 AM

I tend to think like ED before you take anything apart, take the time to turn the engine over with a socket on the front of the engine on the crank and work it back & forth a bit.

I to think your looking at the Valves but that might not be the case but with the fact that there is no external damage showing but I might be wrong. :lol:

 

I want to Welcome you also and invite you to the chat where there are buys talking about and having fun, most of the talk is done in the evening after some that still work stop in.  


Edited by seabee1950, 21 July 2013 - 09:20 AM.


#6 seabee1950

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  • My Project Cars:I bought a Plymouth Business Coupe that I knew a little bit about these cars but never took one apart this far.
    I want it done but that takes time and I didn't buy it to make money this is a project and if I get it done then it will be my cruiser.

Posted 21 July 2013 - 09:10 AM

I tend to think like ED before you take anything apart, take the time to turn the engine over with a socket on the front of the engine on the crank and work it back & forth a bit.

I to think your looking at the Valves but that might not be the case but with the fact that there is no external damage showing but I might be wrong. :lol: 



#7 greg g

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Posted 21 July 2013 - 10:46 AM

Some folks have reported good success using a 50/50 mix of diesel fuel and auto trans fluid for an engine soak.


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#8 garbagestate 44

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Posted 21 July 2013 - 01:40 PM

Years ago when my 251 was stuck I pulled the head and poured the oil in directly. What I found was that the oil leaked out on the pistons which weren't  stuck and stayed in the bores on the ones that were. That's not a rule of course, just an observation. I agree with the other members that a bar and socket and a good long soak is worth a try. It's a good cheap start.



#9 47Mopey63

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Posted 22 July 2013 - 03:56 PM

I pulled the plugs and used a thin bladed screw driver to probe into the holes.  I could see what I thought was the top of the pistons.  Is there a diagram somewhere that shows the relationship of the valves to the spark plug holes.  Do the valves "straddle" the spark plug hole, one on either side?  I poured in a mixture of ATF & acetone, which seemed to drain down.  The car is about 200 miles away at my sons house.  The good news is that he is a better gearhead than I am. (And younger)

 

Thanks for the reply's

 

Paul



#10 Don Coatney

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Posted 22 July 2013 - 04:00 PM

This might or might not help.

 

bidneside.jpg


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http://smg.photobuck...519373465134713

 

 

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