CaptnKingfisher
Petty Officer 1st Class
- Joined
- May 14, 2017
- Messages
- 259
Boat belongs to a friend, I'm a shadetree mechanic (mainly outboards and my work truck). Anyway I show up to fix an ignition switch on a boat that hasn't been run since winter. Get the job done, we fire it up and water begins to fill the bilge. At this point notice a core plug missing. "Uh yeah, I sort of half-assed winterizing this thing" he says. Okkayy. So I replaced the plug, voiced concerns about what else might have gotten damaged if the block froze bad enough to push out a core plug. I don't know much but Google does, and I found out the next step to take is to pressure test the block.
This is where you come in cuz like I said, I don't know much. The manual I have says nothing about a pressure test or hose sizes, but I've been reading up previous threads and doing my due diligence. Boat is out of my way and owner isn't really savvy enough to look at the hoses and tell me what I need to bring to plug em up. but id like to be able to show up with everything I need to test the system. Got myself a nice automotive cooling system pressure tester with a bunch of adaptors and fittings coming tomorrow. I also got some rubber plugs 3/4" to 1" taper and 1 plug that has a 1 1/4" to 2" taper.
Let me know if I'm missing something here but this is how I plan to proceed:
1. Remove the hose at the thermostat housing which comes from the impeller pump. Connect pressure tester here (hopefully I have an adapter, if anyone has advice on what I'll need to make this connection, spare hose maybe?)
2. Disconnect hose at thermostat that comes from intake manifold and plug (with one of my tapered rubber 3/4" to 1" plugs)
3. Pump 15 (or 20?) PSI into the system and monitor for an hour.
Sound about right? I spent about 45 minutes studying the diagram to come up with step one and two
but I think that's all I need to create a closed loop, the air will go from the thermostat, through the circulating pump, to the block to the head from the head it will go out two directions, one back to thermostat, other to the intake manifold, then from the intake manifold it wants to go
This is where you come in cuz like I said, I don't know much. The manual I have says nothing about a pressure test or hose sizes, but I've been reading up previous threads and doing my due diligence. Boat is out of my way and owner isn't really savvy enough to look at the hoses and tell me what I need to bring to plug em up. but id like to be able to show up with everything I need to test the system. Got myself a nice automotive cooling system pressure tester with a bunch of adaptors and fittings coming tomorrow. I also got some rubber plugs 3/4" to 1" taper and 1 plug that has a 1 1/4" to 2" taper.
Let me know if I'm missing something here but this is how I plan to proceed:
1. Remove the hose at the thermostat housing which comes from the impeller pump. Connect pressure tester here (hopefully I have an adapter, if anyone has advice on what I'll need to make this connection, spare hose maybe?)
2. Disconnect hose at thermostat that comes from intake manifold and plug (with one of my tapered rubber 3/4" to 1" plugs)
3. Pump 15 (or 20?) PSI into the system and monitor for an hour.
Sound about right? I spent about 45 minutes studying the diagram to come up with step one and two
but I think that's all I need to create a closed loop, the air will go from the thermostat, through the circulating pump, to the block to the head from the head it will go out two directions, one back to thermostat, other to the intake manifold, then from the intake manifold it wants to go
