I have a 1970 383, that I can't turn over. I've been pouring diesel on top of the pistons and i was wondering what i can use to get the motor to turn over. I've been trying to turn it over using a breaker bar.

 

has this motor been sitting in the weather or in a vehicle marvels mystery oil or trany fluid are you sure none of the accessories are stuck /alternator whats the situation can u prime the oil system

 

Transmission in neutral? Spark plugs removed? Has it ever turned over for you, like has it just come out of storage or did you buy it this way?

 

A bigger breaker bar 3/4" and 3' length of pipe. Do it at your own risk !

 

It was garage kept on an engine stand, and then after the person i bought it from said he had left it outside on a hoist for a few years. It came out of a polara, he said he couldn't get the motor to turn over by hand. Right now its on an engine stand and everything has been taken off.

 

sounds like you need to rebuild it just take it apart and see whats rusted up im sure you got serious issues inside it

 

The motor has been torn apart, but i can't get any of the internals out rods, pistons etc. Iv'e been pouring diesel on top of the pistons, to try to loosen it up but I had no luck. I tried a three foot pipe on top of my breaker bar to try to turn it over, but it didn't budge. I 'm looking to see if i could find another way to unfreeze it. I heard of this product called metal rescue, any ideas.

 

Take the crank out and get a BIG hammer to drive the pistons out. Most likely will need a re bore

 

I was planning to bore it 60 over but what if hammering out the pistons damages the cylinders to a point of no return? Im open to any ideas, but i just want to make sure i choose the right one.

 

Take your long bar and hang a wieght on it and just let it sit, will probably take a few days. When you see the bar drop some, switch it to the other side.

 

Diesel really isn't all that great for freeing motors, it's the old turn to, but using newer products like PB Blaster or even WD40 with the head off are a better choice. Make sure you apply to top and bottom and really layer it on about 2-3 times per day, do the bottom skirt side first as it sounds like the top has a head start.

Get the biggest wooden dowel you can get past the rod and hammer them out bottom to top for pistons in the TDC or abouts position and top down for those on the down stroke

Good luck!

 

383 -

Been there done that.

The odds are some water got into one or more cylinders and the piston and cylinder rusted together. If they have been sitting in oil for any length of time with no movement, it's going to be a brute force thing.

Remove the crank and rods, use a section of 2x4 and begin pushing the piston out with a big hammer, the shortest way possible (from the top or the bottom of the block).

I was lucky. In my case there was only one piston that was frozen, and the cylinder only required resurfacing.

Good luck!

Archer

 

Same here been there don that spray & spray & spray again I went through this with my sons 440 2 were stuck just like they all said wood and a big hammer or a small sledge it will be fine

 

thanks for all the advice guys looks like im just going to try and hammer the pistons out.