northern
Well-Known Member
- Jan 17, 2007
- 3,526
- Boat Info
- 380 Aft Cabin 1989 Charts Timezero radar Furuno
- Engines
- Twin 454 strait shaft
Engine 5.7 V8 closed anti freeze system. Engine is in my jetboat.
Engine had not run in 2 years. Started up well. Engine has 50 hours on it.
Took 2 quarts of anti freeze during warm up. Anti freeze bubbled during warmed up, stopped after warm up.
Engine continues to use anti freeze.1" an hour in heat exchanger. Let engine idle 1100 RPM and added 1" of anti freeze an hour. Have not run boat on lake yet.
Took end caps off heat exchangers. Blew all raw water out with compressed air.
Pressured up heat exchanger and entire engine to 10PSI let sit 2 hours. Pressure did not drop. No anti freeze came out exchanger tubes.
Pressured up to 7PSI that is rad cap pressure and no drop in pressure.
All pressuring up done to cold engine.
Any one have comments or idea what I should do next or what the problem could be.
Any one know how high I can pressure up anti freeze system and not damage parts?
Engine had not run in 2 years. Started up well. Engine has 50 hours on it.
Took 2 quarts of anti freeze during warm up. Anti freeze bubbled during warmed up, stopped after warm up.
Engine continues to use anti freeze.1" an hour in heat exchanger. Let engine idle 1100 RPM and added 1" of anti freeze an hour. Have not run boat on lake yet.
Took end caps off heat exchangers. Blew all raw water out with compressed air.
Pressured up heat exchanger and entire engine to 10PSI let sit 2 hours. Pressure did not drop. No anti freeze came out exchanger tubes.
Pressured up to 7PSI that is rad cap pressure and no drop in pressure.
All pressuring up done to cold engine.
Any one have comments or idea what I should do next or what the problem could be.
Any one know how high I can pressure up anti freeze system and not damage parts?