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posted to rec.boats.building
Capt. Geoffrey Thorpe
 
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Default 350 V8 penta engine full of water after winter (Won't move)

"T-Rav" wrote in message
oups.com...
Hello, I was wondering if anyone had any suggestions for me. I have a
bayliner that I bought with a rebuilt motor, however, the old owner
left the distributor out of the engine and the cover off over the
winter and the motor filled with water. I was able to drain the water
and add oil, but I can not get the motor to move. I have taken it out
of the boat and now it is on a engine stand with the pan off soaking in
Marvel Mystery oil. The engine was never started with water in it. Any
suggestions on inspecting for damage? Freeing up the motor? Thanks for
your help.


You have it out. That's the hard part. You're just going to have to get it
apart to find the problem. I'd start by pulling the pan - then you can pull
a rod bearing or two and find out if the pistons are rusted in the bore or
if the problem is somewhere else.

--
Geoff
The Sea Hawk at Wow Way d0t Com
remove spaces and make the obvious substitutions to reply by mail
When immigration is outlawed, only outlaws will immigrate.


  #12   Report Post  
posted to rec.boats.building
 
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Default 350 V8 penta engine full of water after winter (Won't move)



I can't see that it would have enough water in the engine block to
really sieze stuff up.

BUT! if you have the pan off, and the timing cover off as well, you
might find that the timing chain is rusted and the links are solid.

If that's the case, then you probably have an easy way out. Take off
the timing set, and oil pump. with spark plugs removed, you should be
able to turn the engine with some leverage, that is, providing the
pistons arn't locked into the cylinder.


I'd like to know why the heck the previous owner had the distributor
out in the first place.

Tom Dacon wrote:
On rereading you original post, I see that you said it was the distributor
mount that took the water (I misread it as carburetor, for some reason, and
may have jumped to a conclusion). So the cylinder business might not apply,
and it might be easier than I thought. I don't know your engine, but if you
can expose the geartrain that drives the distributor, you might find that
the damage is limited to that area. If the distributor is at the front of
the engine, the timing gear cover may expose it. If the distributor drives
off the camshaft, which it usually does, you will probably have rust on the
camshaft down in the camshaft bushings - that'd freeze the camshaft - and
might have to pull it and do some work on it. Then just look 'downhill' for
wherever the water wants to run to see where else it might have gotten to.

Good luck.

Tom

"T-Rav" wrote in message
oups.com...

Tom Dacon wrote:
Well, you may not like ee's opinion, but that's probably where you will
end
up (although you could do it yourself instead of sending it out).

This happened to me once, although not in exactly the same way it did to
you. What's almost certainly going on is that the water in the cylinders
has
caused the piston rings to rust to the cylinder walls. The iron oxide
freezes the pistons tight in the cylinders, and it's a real bitch to free
them up unless you have machine shop resources.

The way I freed things up was to take the cylinder head off and fill up
the
cylinders above the pistons with penetrating oil (I used Kroil, but
Marvel
Mystery Oil would be just as good). Take off the pan and the rod caps.
It's
easiest if you remove the crankshaft, but it's still possible without.
Let
the oil soak in for a long time. Alternatively drive the pistons up and
down
with a medium-sized hand sledge. On the top use a block of hard wood like
oak to cushion the blows. From the underside, you can use a long hardwood
dowel, maybe an inch or more in diameter, pushed up from underneath until
it
contacts the inside of the piston. If you don't take the crankshaft out,
you'll have to start from below until you can drive the pistons up away
from
the journals on the crank. Eventually you'll get the pistons free, and if
you're lucky you won't damage them.

After you get the pistons out, you can break out the rings, and the
pistons
will clean up fine with a wire wheel. But now you're probably looking at
some serious pitting in the cylinders. If the pits aren't too deep, the
block can be overbored to get to a good surface, but you'll need oversize
rings and maybe oversize pistons too. The best possible outcome would be
if
honing the cylinders got rid of the rust without leaving pits. But it
probably won't happen.

Basically this is a rebuild. In a machine shop this kind of thing is a
lot
easier because the machinist can tear the whole block down and then use a
hydraulic press to get the pistons out. You'll spend days at it.

Sorry 'bout that.

Tom Dacon


"T-Rav" wrote in message
ups.com...

ee wrote:
"T-Rav" wrote in message
oups.com...
Hello, I was wondering if anyone had any suggestions for me. I have
a
bayliner that I bought with a rebuilt motor, however, the old owner
left the distributor out of the engine and the cover off over the
winter and the motor filled with water. I was able to drain the
water
and add oil, but I can not get the motor to move. I have taken it
out
of the boat and now it is on a engine stand with the pan off soaking
in
Marvel Mystery oil. The engine was never started with water in it.
Any
suggestions on inspecting for damage? Freeing up the motor? Thanks
for
your help.

Pull the motor and send it to the machine shop for a rebuild.

Hey thanks for that answer. I am looking for suggestions on freeing the
motor and inspection. Not your stupid opinion asshole. Rebuilding it is
the very last option for me.


Hey Tom, thank you so much for the suggestion. Any suggestion on the
bearings? What to look for. Thanks



  #13   Report Post  
posted to rec.boats.building
Capt. Geoffrey Thorpe
 
Posts: n/a
Default 350 V8 penta engine full of water after winter (Won't move)

"T-Rav" wrote in message
ups.com...

Thank you for all your help. I would like you to know that I have taken
the pan off, soaked the the cylinders and with some rocking it back and
fourth, I have freed the engine. I can now turn it almost by hand. No
sign of any rust in the cylinders. I am replacing the oil pump and will
put it back together. Any extra advise at this point?


Check the compression and fire it up on the driveway before you make the
effort to re-install it...

But don't waste too much time or you will run out of summer.

--
Geoff
The Sea Hawk at Wow Way d0t Com
remove spaces and make the obvious substitutions to reply by mail
When immigration is outlawed, only outlaws will immigrate.


  #14   Report Post  
posted to rec.boats.building
Brian D
 
Posts: n/a
Default 350 V8 penta engine full of water after winter (Won't move)


We had that happen on a car's V8 once when it was left over winter without
spark plugs in it. The motor froze up pretty good, including the
distributor shaft. We got it freed up and replaced the distributor, but it
burned oil like heck after that. Ended up disassembling, honing out the
cylinders, replacing the rings, valves, and valve guides. It was fine after
that.

Brian D


"Capt. Geoffrey Thorpe" The Sea Hawk at wow way d0t com wrote in message
...
"T-Rav" wrote in message
ups.com...

Thank you for all your help. I would like you to know that I have taken
the pan off, soaked the the cylinders and with some rocking it back and
fourth, I have freed the engine. I can now turn it almost by hand. No
sign of any rust in the cylinders. I am replacing the oil pump and will
put it back together. Any extra advise at this point?


Check the compression and fire it up on the driveway before you make the
effort to re-install it...

But don't waste too much time or you will run out of summer.

--
Geoff
The Sea Hawk at Wow Way d0t Com
remove spaces and make the obvious substitutions to reply by mail
When immigration is outlawed, only outlaws will immigrate.



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