Diesel Compression Release ??
 

I could probably find the answer to this question if I removed the valve
cover on my engine..

Which valve does the compression release normally effect. Exhaust or
Intake??

The reason I ask, I have had a problem with wet exhaust water getting back
into the cylinder on my Entec/Farymen gen set engine. This happens when I
have intial trouble getting it started and after I use the compression
release.

I'm thinking that the exhaust valve must be staying open during the down
stroke (normal power stroke) while the intake is closed. This then sucks
water in from the wet exhaust elbow (water is injected just after the bend
of this elbow).

Even if the compression release doesn't effect the exhaust valve, I suspect
the exhaust valve may be sticking open after long idle period (week or so).

Just curious.

Steve
s/v Good Intentions

"Steve" wrote in
:

The reason I ask, I have had a problem with wet exhaust water getting
back into the cylinder on my Entec/Farymen gen set engine. This
happens when I have intial trouble getting it started and after I use
the compression release.


I do not know the answer to the compression lever, but when the engine is
cranked and it does not start, the water accumulates in the exhaust system.
There is no explosion to push it out and depending on how high it has to go
it might as well come back into the engine.

I have seen suggested somewhere that you close the water intake if the
engine has to be cranked for a long time while it does not start or you do
not want it to start (Winterizing).


Steve
s/v Good Intentions




JM

Sounds like you have the same genset that I do. I'll look into
the manual and let you know what I find. In any case, what
you describe sounds like an installation problem. The seven
cranks before the compression release closes should not
produce the problem you describe. Have you contacted
Entec? I had a problem with mine and they were very
halpful.

Doug
s/v Callista

"Jean-Marie" wrote in message
...


"Steve" wrote in
:

The reason I ask, I have had a problem with wet exhaust water getting
back into the cylinder on my Entec/Farymen gen set engine. This
happens when I have intial trouble getting it started and after I use
the compression release.


I do not know the answer to the compression lever, but when the engine is
cranked and it does not start, the water accumulates in the exhaust
system.
There is no explosion to push it out and depending on how high it has to
go
it might as well come back into the engine.

I have seen suggested somewhere that you close the water intake if the
engine has to be cranked for a long time while it does not start or you do
not want it to start (Winterizing).


Steve
s/v Good Intentions




JM

On Thu, 21 Oct 2004 19:08:48 -0000, "Jean-Marie"
wrote:

I have seen suggested somewhere that you close the water intake if the
engine has to be cranked for a long time while it does not start or you do
not want it to start (Winterizing).

================================

Yes, the owners manual for one of my old Volvo's recommended exactly
that.

Yes I can see how that would happen if the water lift muffler outlet were
lower than the engine exhaust manifold as well as the overboard.

In my installation the engine exhaust elbow is at least a foot above the
water lift muffler and the overboard discharge is below the water lift (not
really a water lift in this instance).

The only way the water loft could fill to the level of the exhaust elbow is
if the overboard discharge were closed. If that were to happen the
compression pressure would rupture something in the exhaust system.

I still think the exhaust valve is staying open enough (when the engine is
dead cold) and during the power stroke, the piston sucks water vapor into
the cylinder. Not enough to cause a hydraulic lock but enough to show water
traces in the lub oil after a dozen or so start attempts. (no other way for
water to get into the oil in these engines since the water jacketed cylinder
is independent of the crank case, as is the water cooled head. ).

Steve
s/v Good Intentions

I seem to recall that the installation instructions state that exit from the
water lifter must go at least a foot above the waterline before exiting
the boat. Does your's do this?

Doug
s/v Callista

"Steve" wrote in message
...
Yes I can see how that would happen if the water lift muffler outlet were
lower than the engine exhaust manifold as well as the overboard.

In my installation the engine exhaust elbow is at least a foot above the
water lift muffler and the overboard discharge is below the water lift
(not
really a water lift in this instance).

The only way the water loft could fill to the level of the exhaust elbow
is
if the overboard discharge were closed. If that were to happen the
compression pressure would rupture something in the exhaust system.

I still think the exhaust valve is staying open enough (when the engine is
dead cold) and during the power stroke, the piston sucks water vapor into
the cylinder. Not enough to cause a hydraulic lock but enough to show
water
traces in the lub oil after a dozen or so start attempts. (no other way
for
water to get into the oil in these engines since the water jacketed
cylinder
is independent of the crank case, as is the water cooled head. ).

Steve
s/v Good Intentions

Steve, close the water intake value when you have trouble starting your engine.
otherwise, you can back up water from the waterlift muffler. When the engine
starts, open the intake valve.

From: "Steve"
Date: 10/21/2004 12:59 PM Eastern Daylight Time
Message-id:

I could probably find the answer to this question if I removed the valve
cover on my engine..

Which valve does the compression release normally effect. Exhaust or
Intake??

The reason I ask, I have had a problem with wet exhaust water getting back
into the cylinder on my Entec/Farymen gen set engine. This happens when I
have intial trouble getting it started and after I use the compression
release.

I'm thinking that the exhaust valve must be staying open during the down
stroke (normal power stroke) while the intake is closed. This then sucks
water in from the wet exhaust elbow (water is injected just after the bend
of this elbow).

Even if the compression release doesn't effect the exhaust valve, I suspect
the exhaust valve may be sticking open after long idle period (week or so).

Just curious.

Steve
s/v Good Intentions

doug, knock it the frick off. you have not a frickin clew as to what is going
on. keep your ignorant on this subject self quiet.

dougs, it is not hardly necessary for you to open your mouth on every subject.


From: "Doug Dotson" AMcom
Date: 10/21/2004 6:16 PM Eastern Daylight Time
Message-id:

Sounds like you have the same genset that I do. I'll look into
the manual and let you know what I find. In any case, what
you describe sounds like an installation problem. The seven
cranks before the compression release closes should not
produce the problem you describe. Have you contacted
Entec? I had a problem with mine and they were very
halpful.

Doug
s/v Callista

"Jean-Marie" wrote in message
...


"Steve" wrote in
:

The reason I ask, I have had a problem with wet exhaust water getting
back into the cylinder on my Entec/Farymen gen set engine. This
happens when I have intial trouble getting it started and after I use
the compression release.


I do not know the answer to the compression lever, but when the engine is
cranked and it does not start, the water accumulates in the exhaust
system.
There is no explosion to push it out and depending on how high it has to
go
it might as well come back into the engine.

I have seen suggested somewhere that you close the water intake if the
engine has to be cranked for a long time while it does not start or you do
not want it to start (Winterizing).


Steve
s/v Good Intentions




JM

weeneyn, do be quiet. adults are talking. go stand in the corner, for you are
utterly ignorant on this subject. get used to it.

From: Wayne.B
Date: 10/21/2004 8:16 PM Eastern Daylight Time
Message-id:

On Thu, 21 Oct 2004 19:08:48 -0000, "Jean-Marie"
wrote:

I have seen suggested somewhere that you close the water intake if the
engine has to be cranked for a long time while it does not start or you do
not want it to start (Winterizing).

================================

Yes, the owners manual for one of my old Volvo's recommended exactly
that.

Steve, exhaust gases ********MUST******** be present to move water from the
waterlift muffler overboard. If your engine is not starting, shut off the
water intake valve or suffer the consequences.


Yes I can see how that would happen if the water lift muffler outlet were
lower than the engine exhaust manifold as well as the overboard.

In my installation the engine exhaust elbow is at least a foot above the
water lift muffler and the overboard discharge is below the water lift (not
really a water lift in this instance).

The only way the water loft could fill to the level of the exhaust elbow is
if the overboard discharge were closed. If that were to happen the
compression pressure would rupture something in the exhaust system.

I still think the exhaust valve is staying open enough (when the engine is
dead cold) and during the power stroke, the piston sucks water vapor into
the cylinder. Not enough to cause a hydraulic lock but enough to show water
traces in the lub oil after a dozen or so start attempts. (no other way for
water to get into the oil in these engines since the water jacketed cylinder
is independent of the crank case, as is the water cooled head. ).

Steve
s/v Good Intentions