I really appreciate all the advice and brainstorming. It has allowed me to look at this from many angles. Now if you will indulge me, help me sift through all this and get to the root of the problem.
We ran all the way to PI but I don't remember much in the way of waves crashing into the stern. I had no wind
once inside PI so motored 10 hours for 10 days from Cebu to Subic without any sign of engine distress
has been sent off to be machined and the valve set replaced. The pistons, rings and liner all seem to be good.
I just don't know what to think. *Exhaust manifold completely packed with salt
from number four port all the way to the elbow
, completely obstructed. But the engine and cylinders not flooded.
Here is my thought process at this point.
1. Many people have suggested that the water lock muffler
is too small for the exhaust hose/exhaust run. Also the exhaust run between the elbow
and the muffler
being too long and or the muffler being in the wrong location. The long hose running down and under the engine to the muffler in front of the engine adds significant volume if the muffler were too small. You would have to fill that entire hose as well as the muffler before it backed up into the engine. But if that were the case it seems to me that the engine would actually flood and if the engine flooded water would not compress and the engine would not have run, what do you think?
2. The heat exchanger: This engine is water cooled. The heat exchanger / exhaust manifold are a single
cast so one piece. The raw water/salt water passes through coils that are surrounded by coolant. If they cracked they would only mix with coolant. The coolant and it's reservoir was still full and orange so I have no reason to suspect it had been replaced with sea water.
3. The next suspect is the anti siphon in between the raw water
heat exchanger and the exhaust elbow. Again that seems to be fine and if it were a problem any water should drain down and out the elbow, gravity shouldn't bring it back into the manifold. UNLESS it filled the muffler and all the hose between it and the elbow and if that were the case again it seems the engine would actually flood?
4. My best guess at this point is a bad gasket
between elbow and the manifold allowing a trickle of water to drip in leaving salt behind but not flooding the engine? The gasket
looked fine when it came out. Its a metal gasket, no corrosion
, no pits.
The problem broken down is salt in the manifold without water in the pistons. But more specifically salt at the back of the manifold not throughout the manifold. And salt blackened with carbon throughout so probably a long time building?
So with all this clarity can we start over? I'm new and don't have any experience so where my thought process is faulty set me straight.
S/V Thin Wolf