Question on water in oil

Well ... it's the water system and the oil system that are "shorted" ... so
the compression could be 100% and the problem could still be in the head. As
far as I know, the problem could occur in the block, the head, the intake
manifold ... or the gaskets in between which sounds like in your case is not
likely the head to block gasket (assuming 120 psi is ok). My money's on the
block or the manifold gasket ... but not the manifold or head. Is there oil
leaking onto the motor ... could indicate a failing manifold gasket.


"Phil Bianchi" <Bianchi47.RemoveThis@webtv.net> wrote in message
news:11341-3F807E8D-197@storefull-2355.public.lawson.webtv.net...
 > Hi Fellow Boaters
 >
 > I have a question on water seeping into my oil on my 140 MerCruiser .
 > Any opinions would be appreciated . It started slow and now I can't run
 > the motor five minutes with out the oil pan filling up with water . I'm
 > hoping its a cracked head , and not the block . Could it be the head ? I
 > did a compression check , all 4 cylinders are at about 120 psi .
 >
 > Phil
 ><!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: Question on water in oil 

You don't mention the age or hours, don't forget about rust through, you are
not just looking for a crack. In fact from the amount of influx of water, I
doubt a crack. In most areas of the head, rust through would be into a
combustion chamber, quickly noticed as a dead cylinder. Rust through in the
block can go into the valley (oil) easily, but the intake manifold would,
given the high flow of water, be my first bet. Question is now though, how
much damage have you done to bearings, cam shaft, lifters, ring seats etc
etc.

If the engine was run that full, it's probably heavily damaged. It sounds
like it takes on this water running more so then sitting which would then
suggest to look into parts above the water line. If it were somewhere below
the water line it would take on large amounts of water all the time..

Greg

"bowgus" <Bowgus.TakeThisOut@rogers.com> wrote in message
news:1Ulgb.42267$ko%.12046@news04.bloor.is.net.cable.rogers.com...
 > Well ... it's the water system and the oil system that are "shorted" ...
so
 > the compression could be 100% and the problem could still be in the head.
As
 > far as I know, the problem could occur in the block, the head, the intake
 > manifold ... or the gaskets in between which sounds like in your case is
not
 > likely the head to block gasket (assuming 120 psi is ok). My money's on
the
 > block or the manifold gasket ... but not the manifold or head. Is there
oil
 > leaking onto the motor ... could indicate a failing manifold gasket.
 >
 >
 > "Phil Bianchi" <Bianchi47.TakeThisOut@webtv.net> wrote in message
 > news:11341-3F807E8D-197@storefull-2355.public.lawson.webtv.net...
  > > Hi Fellow Boaters
  > >
  > > I have a question on water seeping into my oil on my 140 MerCruiser .
  > > Any opinions would be appreciated . It started slow and now I can't run
  > > the motor five minutes with out the oil pan filling up with water . I'm
  > > hoping its a cracked head , and not the block . Could it be the head ? I
  > > did a compression check , all 4 cylinders are at about 120 psi .
  > >
  > > Phil
  > >
 >
 ><!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: Question on water in oil 

Thanks for the info you guys . I think I found the problem tonight . I
pulled the head off , theirs a visible hair line crack ( w/rust )
running straight down number 2 cylinder , its also pitted at the bottom
of the crack . The piston in that cylinder is nice and shinny where the
crack is . That explains all the steem in my exhaust . My plan is to
order a new block from Mercruiser , have all internal part inspected by
a machine shop and have the machine shop assemble the short block , then
I'll put the rest together and hopefully go boating .

Thanks Again
Phil
 >> Stay informed about: Question on water in oil 

I dunno but ... is it possible to have the shop install a sleeve? Anyway,
suggest you discuss your plan with the shop before ordering that block.
Maybe other new parts are also required. I say this because I myself don't
know what all comes with the block.

"Phil Bianchi" <Bianchi47 RemoveThis @webtv.net> wrote in message
news:19178-3F83573D-549@storefull-2352.public.lawson.webtv.net...
 >
 > Thanks for the info you guys . I think I found the problem tonight . I
 > pulled the head off , theirs a visible hair line crack ( w/rust )
 > running straight down number 2 cylinder , its also pitted at the bottom
 > of the crack . The piston in that cylinder is nice and shinny where the
 > crack is . That explains all the steem in my exhaust . My plan is to
 > order a new block from Mercruiser , have all internal part inspected by
 > a machine shop and have the machine shop assemble the short block , then
 > I'll put the rest together and hopefully go boating .
 >
 > Thanks Again
 > Phil
 ><!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: Question on water in oil 

Doh ... forget the sleeve idea ... was thinking air cooled engine ...

"bowgus" <Bowgus.DeleteThis@rogers.com> wrote in message
news:jiJgb.253003$Lnr1.219114@news01.bloor.is.net.cable.rogers.com...
 > I dunno but ... is it possible to have the shop install a sleeve? Anyway,
 > suggest you discuss your plan with the shop before ordering that block.
 > Maybe other new parts are also required. I say this because I myself don't
 > know what all comes with the block.
 >
 > "Phil Bianchi" <Bianchi47.DeleteThis@webtv.net> wrote in message
 > news:19178-3F83573D-549@storefull-2352.public.lawson.webtv.net...
  > >
  > > Thanks for the info you guys . I think I found the problem tonight . I
  > > pulled the head off , theirs a visible hair line crack ( w/rust )
  > > running straight down number 2 cylinder , its also pitted at the bottom
  > > of the crack . The piston in that cylinder is nice and shinny where the
  > > crack is . That explains all the steem in my exhaust . My plan is to
  > > order a new block from Mercruiser , have all internal part inspected by
  > > a machine shop and have the machine shop assemble the short block , then
  > > I'll put the rest together and hopefully go boating .
  > >
  > > Thanks Again
  > > Phil
  > >
 >
 ><!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: Question on water in oil 

Many water cooled engines use them too Bowgus, you're not as far off as you
think, mostly diesel and some older gas engines, but certainly not limited
to air cooled engines..

A proper short block should come with crank, pistons, rings, cam and all
bearings. It won't include heads, lifters (but may), pushrods or anything
that bolts on outside.

Phil, make sure to have the heads magnafluxed (checks for cracks) as well as
checked for a flat deck and especially check the valves, one may be warped
now from water (cools it too rapidly). I would also have that done before I
ordered a short block, a total head rebuild could be close to the cost of
ordering a complete long block instead, then you have peace of mind knowing
it is a complete package with a warranty as such too..

Greg

"bowgus" <Bowgus.TakeThisOut@rogers.com> wrote in message
news:mkJgb.253021$Lnr1.127711@news01.bloor.is.net.cable.rogers.com...
 > Doh ... forget the sleeve idea ... was thinking air cooled engine ...
 >
 > "bowgus" <Bowgus.TakeThisOut@rogers.com> wrote in message
 > news:jiJgb.253003$Lnr1.219114@news01.bloor.is.net.cable.rogers.com...
  > > I dunno but ... is it possible to have the shop install a sleeve?
Anyway,
  > > suggest you discuss your plan with the shop before ordering that block.
  > > Maybe other new parts are also required. I say this because I myself
don't
  > > know what all comes with the block.
  > >
  > > "Phil Bianchi" <Bianchi47.TakeThisOut@webtv.net> wrote in message
  > > news:19178-3F83573D-549@storefull-2352.public.lawson.webtv.net...
   > > >
   > > > Thanks for the info you guys . I think I found the problem tonight . I
   > > > pulled the head off , theirs a visible hair line crack ( w/rust )
   > > > running straight down number 2 cylinder , its also pitted at the
bottom
   > > > of the crack . The piston in that cylinder is nice and shinny where
the
   > > > crack is . That explains all the steem in my exhaust . My plan is to
   > > > order a new block from Mercruiser , have all internal part inspected
by
   > > > a machine shop and have the machine shop assemble the short block ,
then
   > > > I'll put the rest together and hopefully go boating .
   > > >
   > > > Thanks Again
   > > > Phil
   > > >
  > >
  > >
 >
 ><!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: Question on water in oil 

Thanks for your input guys . I've been looking on Doug Russ's marine
motor site . I'm thinking of buying a new motor , or the new 3.0 base
block with head . I have to check Doug Ross's site out first , and make
sure the guys on the up and up .

Thanks Again
Phil
 >> Stay informed about: Question on water in oil