Dennispell
Cadet
- Joined
- Dec 8, 2015
- Messages
- 8
I purchase this boat in 2014 with 199 hours in fresh water lakes. It now has 325 hours in salt water.
This boat overheated for first time after being on trailer for 4 months in warm weather. I brought it on the trailer to a Volvo Authorized Service Center in Galveston County Texas and they replaced the impeller which they said was spun rather than broken. I did not test the repair myself, but had it placed back on the trailer for 9 months of outside storage starting in November. I drained the water and filled hoses with antifreeze. I relaunched the boat the following August and had intermittent overheating. It overheats when run at full throttle for any length of time, but will run at 3000 RPM all day without overheating. Overheating is confirmed by two different IR temperature sensors.
I brought it back to the same Volvo Authorized Service Center and they replaced raw water pump and declared it fixed. I picked it up and took it for 5-minute test drive and brought it back. Still overheated at 4500 RPM. They took out thermostat and it tested as okay, but they replaced it anyway. They also recommended replacing manifold gaskets and removing lower unit to check connections for cracks and leaks and flush water inlet system. All of which was done. Engine still consistently overheats at high RPMs.
They are stumped and when I introduced them to the clear hose, pressure and vacuum gauge tests recommended by Volvo they showed little knowledge or interest.
I have subsequently replaced both belts, replaced the thermostat again and checked hoses and thermostat housing for any blockages. There has been no change.
I had noticed water leaking from the new raw water pump and was told by the Volvo Authorized mechanic that it might be due to faulty pulley seals drying out while sitting and those could also be letting air into the system. They supposedly did an on-water test without any further leaks.
I have now installed clear hoses at the raw water pump on the inlet and outlet hoses. The inlet hose shows zero air whereas the outlet hose has much air. I also saw water dripping out of what appear to be weep holes in the raw water pump while I was removing the hoses to install clear hoses. There are no other leaks into the bilge under the engine.
Here is my question, is there any way for the pulley seals to be allowing air to enter the pump and water flow? From what I am seeing in the after-market manuals it doesn?t look like this could happen. Yet there do seem to be weep holes in the pump housing so what are these for and what is causing them to drip water? HELP!
This boat overheated for first time after being on trailer for 4 months in warm weather. I brought it on the trailer to a Volvo Authorized Service Center in Galveston County Texas and they replaced the impeller which they said was spun rather than broken. I did not test the repair myself, but had it placed back on the trailer for 9 months of outside storage starting in November. I drained the water and filled hoses with antifreeze. I relaunched the boat the following August and had intermittent overheating. It overheats when run at full throttle for any length of time, but will run at 3000 RPM all day without overheating. Overheating is confirmed by two different IR temperature sensors.
I brought it back to the same Volvo Authorized Service Center and they replaced raw water pump and declared it fixed. I picked it up and took it for 5-minute test drive and brought it back. Still overheated at 4500 RPM. They took out thermostat and it tested as okay, but they replaced it anyway. They also recommended replacing manifold gaskets and removing lower unit to check connections for cracks and leaks and flush water inlet system. All of which was done. Engine still consistently overheats at high RPMs.
They are stumped and when I introduced them to the clear hose, pressure and vacuum gauge tests recommended by Volvo they showed little knowledge or interest.
I have subsequently replaced both belts, replaced the thermostat again and checked hoses and thermostat housing for any blockages. There has been no change.
I had noticed water leaking from the new raw water pump and was told by the Volvo Authorized mechanic that it might be due to faulty pulley seals drying out while sitting and those could also be letting air into the system. They supposedly did an on-water test without any further leaks.
I have now installed clear hoses at the raw water pump on the inlet and outlet hoses. The inlet hose shows zero air whereas the outlet hose has much air. I also saw water dripping out of what appear to be weep holes in the raw water pump while I was removing the hoses to install clear hoses. There are no other leaks into the bilge under the engine.
Here is my question, is there any way for the pulley seals to be allowing air to enter the pump and water flow? From what I am seeing in the after-market manuals it doesn?t look like this could happen. Yet there do seem to be weep holes in the pump housing so what are these for and what is causing them to drip water? HELP!