End cap balooning on Volvo MD2010

Thanks Tranona. There is an anti-syphon ,I'm pretty certain it's where you say it should be, but I'll double check. I believe the raw water enters the boat, goes past the gear box, then to the anti-syphon then to the pump and then to the heat exchanger. The hose between the exhaust and the water trap is 30 cm. I may have to find a way of suspending the exhaust hose. My boat sails well heeled at times.
 
LeonF said:
Thanks Tranona. There is an anti-syphon ,I'm pretty certain it's where you say it should be, but I'll double check. I believe the raw water enters the boat, goes past the gear box, then to the anti-syphon then to the pump and then to the heat exchanger. The hose between the exhaust and the water trap is 30 cm. I may have to find a way of suspending the exhaust hose. My boat sails well heeled at times.
Click to expand...

Does not sound right. Water comes in the seacock, maybe to a filter, then to the pump inlet, up to the valve and then to the heat exchanger. The exhaust hose should be stiff enough to form a loop although a clip of some sort is useful to hold it in place. Alternatively Vetus sell a solid goose neck.
 
LeonF said:
I believe the raw water enters the boat, goes past the gear box, then to the anti-syphon then to the pump and then to the heat exchanger.
Click to expand...

Difficult to imagine how this can be. Anti siphon valves let air in but close when pressure is applied. In the system described the hose between seacock and pump is at less than atmospheric pressure, so the valve will be open and supplying air to the pump. The other type of anti siphon valve bleeds a small flow 100% of the time, with the same result as with the valved type.
 
Thanks Allergy. Accept that therein lies the problem, it's just whether I bite the bullet and buy another high rise exhaust, now £440 at Volspec, or get away with a conventional elbow. I am tempted to go for the cheaper option, but in view of the other posters' comments will have a proper reccy of the set up tomorrow before I make a decision.
 
LeonF said:
Thanks Allergy. Accept that therein lies the problem, it's just whether I bite the bullet and buy another high rise exhaust, now £440 at Volspec, or get away with a conventional elbow. I am tempted to go for the cheaper option, but in view of the other posters' comments will have a proper reccy of the set up tomorrow before I make a decision.
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You might save a few quid but you are risking a much larger bill if water gets into the engine.
 
Thanks for all the replies. Just checked my set up. Raw water in to filter high above water line, drops under engine to gear box, hose out to pump, then to anti-syphon, then heat exchanger to exhaust elbow, hose drops to water lock then hose out into locker where it loops high under the deck before exiting on the water line. I could be OK, but Thalia often sails well heeled and can go almost flat in a gust. I could be in trouble, I think, if the exit side was to windward and high in the air with water flowing back down the circuit. Have decided to bite the bullet and go for the high rise, managed to negotiate with a main dealer.
 
Hi Stork, I'm afraid it's the first one. Not usually fitted to the 2010, but mine has it, I expect because the engine is so near the waterline.
 
Just an update guys. I had to bite the bullet and replace it with a new one in the end, but the engine was then part seized and is now having a complete rebuild. Moral of the lesson, with hindsight, is don't f***k around, get the plastic out if need be and replace the darned thing.
 
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