Sand in my cracked engine

Rain finally stopped got better look at the 82 seca i picked up and PO had pulled the heads and jugs and didnt do a vary good job cleaning and sand got in the crank case any way to flush it or am i rebuilding the whole engine now

 

You're doing this now, or you (or the next owner) will be doing it later...…...

 

Maybe not rebuild, but definitely disassemble, clean, and inspect every darn millimeter. Maybe, just maybe the sand got in after the top end was removed, and didn't do any harm.

 

Yea it hasnt ran he said he had it running before pulled the heads to do the rings because of low compression in #4

 

How did he determine that it was from rings being worn (highly unlikely on just one cylinder) and not from a stuck ring or a faulty gauge, or valve clearances being out of spec, or...?

 

I figured it was valve clearance i think he was just gun hoe on rebuilding the top end but didnt clean the motor was bought as a project

 

So in light of this thinking i will part it out unless some one wants to buy it for what i have into it $300 its kinda sad its numbers matching 35k on the speedo but its broken canadian version

 

How much sand is in the oil pan?

 

+1.

Don't part it just yet. Unless the engine was run with the sand in it you will still have a viable engine.
The oil pan can be pulled off easily, even with the engine still in the frame.

 

Try to drain it all into the same pan and pull the filter too. If there is no sand in the filter you may be OK. When you are done draining the oil put the plug back in and drop the pan. See how much grit is left in the bottom. Take a paint strainer and filter the oil and see how much sandy material is left in the strainer.

 

Also, can you get a picture of the cam lobes, cleaned of oil/dirt? If you've disassembled the head it would be good to see how much galling there is on the cam and head journals.

 

I think it fell in when he removed the jugs was still some on there by the studs the oil was drained i can see it on top of the crank. What about flushing with diesel, Or a lighter weight oil?

 

Flush it with 2-stroke gas. You can filter and reuse it.

 

Whats the best way to flush? Leave oil pan in and flush or pull it and flush into drain pan

 

I would take the pan off and flush it from the top down if it fell in from the cylinders. If you have a solvent sprayer use it and soak each rod and crank area heavily. You can also use a bucket on a ladder and some 1/4" tubing to make a siphon/gravity fed rinse tool. I would soak everything down several times and then rotate the crank slowly and look for any deposits of sand left.

 

I'm with the flushing. I imagine not much of the debris will simply 'fall' on to bearing surfaces - as oil needs to be pumped in there - right?

Diesel yes.