Water Dribbling Volvo

[Temeraire]

Hi,

I hope someone here can help. We had a new Hanse delivered last Nov, & so far the Volvo 2020 engine has only seen about 20hrs use. I've been away working for the last two months, & went down yesterday to find that the sump below the engine was full of water.

I was just down getting ready for our first longer passages i.e. longer than day sailing, & was just charging the batteries while the boat was in its berth. Starting to go through where everything is engine wise & noticed the sump was full of water.

I cleaned it all out dry this morning & gave the boat a run up & down the river for 1-2 hrs, while keeping a close eye on it, & noticed the water coming very slowly from the overflow pipe from the Vacuum Valve. I say slowly, but after 1-2 hrs we've got an inch of water in the sump again. Is this normal, we had a 25fter with a volvo 2010 & never had this problem.

The engine is (should be) warrantied, but I would be grateful if anyone could shed any light on why this may be happening, before I make a tit of myself with the agent. I have to be honest that I'm not really sure how the vacuum valve really works.

All the stop cocks are open, there's cooling water coming out of the exhaust, & the engine seems to be running fine.

the book says ' a correctly mounted vacuum valve prevents the occurance of a siphoning action with the resulting penetration of water into the engine.'

Its on the seawater cooling side. So I read this to be that it stops any siphoning of water back into the engine via the exhaust while sailing.

PS. Its the first time the engine has been run since Jan.

Any assistance would be very much appreciated.

I've had a look through the search function, & can't find a similar problem listed

Matt

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[eddieperkins]

Matt,
Go to
http://www.boatdiesel.com/
and post your question there, you should get an answer
Regards,
Eddie

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[olavs]

This happens quite often with the Volvo Penta anty syphone valve. First time it happended to me I thought I had a leaking keelbolt......

Take it apart, be aware of the tiny parts and the order in which they appear. You may need a blunt needle to carefully get them out.
Give the rubber membran a slight smear of vegetable oil or similar and assemble again, holding the hole thing upside down. There is specified a certain torque for the nut but its OK as long as you just nip it up very carefully. Apply suction(with your mouth) and it should open slightly and close of you apply pressure(blow). If not, take apart once more and try again.


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[paulrossall]

I agree with Olavs. I had the same problem with the valve which is fitted to my Yanmar 2GM20. I gave it a clean and it now works OK. I reasoned that the sea or river water could have some bits in it and I now clean the valve every season. You do have to be careful with the small bits. If you do not sort it easily get your supplier to look at it, or send it to him, it could be faulty.

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[dickh]

As said before, take the valve apart, clean carefully and reassemble - should cure your problem. Usually caused by salt crystals or gunge in the water.
If still a problem, you could replace with a Vetus 'vent' which vents excess water overboard at the transom. Clean annually.

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I'd rather be sailing... /forums/images/icons/smile.gif

 

[tristan]

This fault will be fixed uunder warranty by volvo. We have had to change dozens of valve and unfortunatly the volvo syphon break is just not as good as it should be.
No amount of cleaning will make the valve work again, even if it appears to work with the lip test, the rubber seal will ahve been distorted.
With a new seal kit (about £4.00 if you buy one), correctley assembled, the fault will probably dissapear.
My best reccomendation is to buy a vetus syphon break (pt no. AIRVENTV with valve (the one to get) or AIRVENTH without valve (if you want overboard bleed) and the fault will dissaper for good and never return - the best £35 you can spend to stay dry under the sump.

If you need more help on the boat or engine pm me.

Tristan.

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