seventeen2
Seaman
- Joined
- Oct 9, 2009
- Messages
- 64
Good morning,
Any advice on this would be greatly apprecoated!
Have a 2006 volvo 3.0glp-d with 55hrs, and found the other day it would refuse to start.
To cut a long story short, I found No 4 cylinder had a seized exhaust valve (stuck in open position) due to salt water ingress.
I have removed the cylinder head and manifold and found a small amount of water in the cylinder, but plenty of corrosion in the exhaust port and some in the inlet port. The other cylinders and port are perfect.
There is plenty of salt water corrosion in the exhaust chamber in the head and in the opening (where the riser bolts to).
I have left the manifold overnight with water in it to see if any drains into the exhaust port but it is dry as a bone?
The manifold to riser gasket looks fine.
I havent inspected the riser yet as is still on the boat.
It has been suggested that this may be due to water ingestation, but the boat has not moved since it was put on its mooring in September and was run up two weeks prior to this problem with no problems?
I must admit that I do run up the engines occasionally whilst the boat is still tied to the dock and engage forward and reverse a few times, could this cause a backwash?
I must say that the boat is a motor cruiser with a high transom and the riser is well above the water line.
Probably a silly question but when I flush the engines after use, i connect the hose to the flushing port and turn on the tap before starting the engine, Is this correct or can it cause the water to enter the cylinder, i.e with no exhaust gasses to push the water out?
Im a bit stuck as cannot find any obvious problems
Kind Regards
Danny
Any advice on this would be greatly apprecoated!
Have a 2006 volvo 3.0glp-d with 55hrs, and found the other day it would refuse to start.
To cut a long story short, I found No 4 cylinder had a seized exhaust valve (stuck in open position) due to salt water ingress.
I have removed the cylinder head and manifold and found a small amount of water in the cylinder, but plenty of corrosion in the exhaust port and some in the inlet port. The other cylinders and port are perfect.
There is plenty of salt water corrosion in the exhaust chamber in the head and in the opening (where the riser bolts to).
I have left the manifold overnight with water in it to see if any drains into the exhaust port but it is dry as a bone?
The manifold to riser gasket looks fine.
I havent inspected the riser yet as is still on the boat.
It has been suggested that this may be due to water ingestation, but the boat has not moved since it was put on its mooring in September and was run up two weeks prior to this problem with no problems?
I must admit that I do run up the engines occasionally whilst the boat is still tied to the dock and engage forward and reverse a few times, could this cause a backwash?
I must say that the boat is a motor cruiser with a high transom and the riser is well above the water line.
Probably a silly question but when I flush the engines after use, i connect the hose to the flushing port and turn on the tap before starting the engine, Is this correct or can it cause the water to enter the cylinder, i.e with no exhaust gasses to push the water out?
Im a bit stuck as cannot find any obvious problems
Kind Regards
Danny
