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Volvo Penta D1-30 losing cooling fluid |
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Ian2019
Captain Joined: 04 November 2019 Location: Montenegro Status: Offline Points: 184 |
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Posted: 18 August 2021 at 04:39 |
Hi Paul,
Yes the corrosion comes from the raw water side. In the casing just before the face that secures to the exhaust there is a small recess that the salt water sits in, this can be seen in the 1st photo where the yellow deposits are. |
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H385 #317 2014 Tivat Montenegro
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pdc78
Commander Joined: 27 May 2016 Location: UK Status: Offline Points: 128 |
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I've been concerned from the outset that there is no pencil engine anode in the raw water side of the heat exchanger of the D1-30. Do you think that the corrosion emanates from the raw side? Frank - I believe you sail in fresh water so salt corrosion can't be the explanation. Has anyone got any ideas what all D1-30 owners can do to reduce the risk of these problems? Regards, Paul
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H345 #269
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Fendant
Admiral Joined: 03 November 2012 Location: Switzerland Status: Offline Points: 1617 |
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Ian,
I had the same issue with my D1-30F. After leaving port I got the overtemperature alarm. Stopped the engine and checked water filter ( ok) and changed impeller (ok ). Suspected the thermostat as the culprit?. No wind at all! So Friend towed me back and a mech checked the engine next day : No cooling fluid! Nothing in the bilge ?? He is the Volvo specialist and services every year 100 - 200 engines. He never had a failure on the circulation pump. He finally found a small leak ( about one drop every minute creeping along the engine housing ) from the circulation pump. So we refilled the cooling fluid and I made it back to my home port. Engine compartment cozy warm apparently let it evaporate over time. I therefore supect that this leak was unnoticed for months or even seasons. I admit that I checked the oil levels on engine and saildrive but never the cooling fluid Difficulty to source the pump "hey, it never fails", but the yard finally found a new original one. Problem solved, no more drips, nice clean oil absorbing mat under the engine is still pure white after 5 motor hours. Bad part is that the Volvo pump price was 730.- € |
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Frank
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Ian2019
Captain Joined: 04 November 2019 Location: Montenegro Status: Offline Points: 184 |
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Hi All,
To finish off the toppic After extensive testing, there were two problems that manifested at the same time. One the head gasket. Not so simple to change. Secondly the casing of the heat exchanger had corroded (so I was informed this is a known design fault of VolvoPenta) Photo 1 was after removal, you can see salt deposits Photo 2 The pin prick leak after cleaning and taking the material back to something substantial so it could be welded The black line at the bottom of the unit is the hole. This unit is 7 yrs old. |
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H385 #317 2014 Tivat Montenegro
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grumpydatagit
Captain Joined: 22 August 2015 Location: Lymington Status: Offline Points: 225 |
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hi Just a random thought Remove the reservoir from its mountings fill it up again and then lower it until it stops losing fluid - this should give you the level at which the leak is accuring =? Tross
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Ian2019
Captain Joined: 04 November 2019 Location: Montenegro Status: Offline Points: 184 |
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Hi All
Thanks to all of you who have made valued comments and suggestions on this topic It was suggested (somewhere) that it maybe the saltwater raw pump and I did have a very small drip from it, so two days ago I took the pump off and it is now being serviced. So I can not run the engine. I filled up the coolant reservior and to my surpise in the morning it was empty. Here are three photos Taken at 1334 Taken at 1341 Taken at 1642 This is the third time the reservoir has been filled. The engine can not be ran as no saltwater pump. There is no evidence of coolant anywhere to be seen even been over the side and looked at the exhaust outlet. What I dont understand is the liquid is below what I belive is the feed pipe into the heat exchanger shown by red arrow. Any suggestions welcome Desperate Ian
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H385 #317 2014 Tivat Montenegro
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Ian2019
Captain Joined: 04 November 2019 Location: Montenegro Status: Offline Points: 184 |
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Hi Steven,
Thanks for your valued comments and suggestions When the engine is running there is no white smoke or steam from the exhaust, it is how it has been since getting the boat a year ago. We have even taken samples of the exhaust outlet water. |
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H385 #317 2014 Tivat Montenegro
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Ian2019
Captain Joined: 04 November 2019 Location: Montenegro Status: Offline Points: 184 |
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Hi Mschesser, thanks for your support and comments I have changed the oil and filtter and there was no milkiness in the oil, the oil filler cap had no signs (droplets) of water on it. Since changing the oil there has been no raise in oil level. Cheers again for your suggestions
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H385 #317 2014 Tivat Montenegro
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StavrosNZ
Rear Admiral Joined: 24 October 2014 Location: New Zealand Status: Offline Points: 556 |
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as per last post regards head gasket either leaking into oil or is there white smoke/steam coming out the exhaust if you have a head gasket leak it can leak into oil or exhaust outlet.
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Stephen
2010 H400 #691, Auckland, New Zealand |
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Mschesser
Lieutenant Joined: 27 July 2020 Location: Virginia Status: Offline Points: 24 |
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Is there any sign of water/coolant in your oil? A head gasket leak could allow water to leak internally into the oil system. The result would be an increase in the oil level on the dipstick, but also the oil would become very "milky" or creamy in color and consistency. Check your oil dipstick and the oil fill cap for signs of contaminated oil.
Good luck
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M Chesser, 370, “Red Sky”
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