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Old 30-08-2013, 12:02   #1
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Volvo Penta MD2030D Coolant Loss

Hi everybody.
The other day when cruising on my Bavaria 38C with a 2005 VOLVO PENTA MD2030D diesel engine I got an overheat warning and shut it down immediately. I found the coolant expansion tank empty and added 4.5l (1 gallon) of coolant which strangely enough disappeared completely and immediately without leaving any visible trace in the engine compartment. I took me hours to return to the marina on main sail only. Then I refilled the expansion tank, restarted the engine for a few minutes to enter my berth and it ran smoothly, but afterwards the tank was empty again. I disconnected the exhaust manifold and saw some newly added coolant running down. I suspected, dismounted and checked the fresh/sea water heat exchanger but found no leaks. The other possibility then would be a blown head gasket, but there is no water in the oil, and a loss of more than 4.5l (1 gallon) of coolant in a few minutes with engine not running seems a lot to me. Before starting any serious and possibly costly repairs, has anyone any idea where all this coolant has gone...???
Thanks for your attention.
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Old 30-08-2013, 14:21   #2
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Re: VOLVO PENTA MD2030D COOLANT LOSS

The clamp/rubber boot connections on the heat exchanger have a problem and the coolant is passing into the raw water side and exiting the boat. It is easy for the exchanger tube to unseat or not seat well in the rubber boot, or for the clamp to break or slip.

Check the hose clamps for breakage, loosen them and make sure the exchanger tube is centered in both ends and clamp them again.

Mark
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Old 30-08-2013, 14:30   #3
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Re: VOLVO PENTA MD2030D COOLANT LOSS

I had that problem although it leaked out into the engine compartment. Easier to find.
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Old 31-08-2013, 16:12   #4
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Re: VOLVO PENTA MD2030D COOLANT LOSS

Quote:
Originally Posted by colemj View Post
The clamp/rubber boot connections on the heat exchanger have a problem and the coolant is passing into the raw water side and exiting the boat. It is easy for the exchanger tube to unseat or not seat well in the rubber boot, or for the clamp to break or slip.

Check the hose clamps for breakage, loosen them and make sure the exchanger tube is centered in both ends and clamp them again.

Mark
Thanks Mark. Sounds very plausible to me. Will check it out shortly and keep you advised. Emile
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Old 01-09-2013, 13:28   #5
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+1. Ive had problems on an MD2020 with the same boot/heat exchanger coupling. In one case letting raw water into the fresh water side...not good.
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Old 01-09-2013, 19:27   #6
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Are these relatively reliable engines? About to buy a cat w 2 of them w really low hours
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Old 01-09-2013, 20:01   #7
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Re: Volvo Penta MD2030D Coolant Loss

Ours are 15yr old with ~3,000 hrs and no problems at all.

The engine is actually a Perkins Perama M30 that is painted green. You can buy all parts for it through Perkins.

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Old 06-09-2013, 06:17   #8
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Re: Volvo Penta MD2030D Coolant Loss

HI Belizesailor sent you pm
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Old 06-09-2013, 18:42   #9
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Quote:
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Are these relatively reliable engines? About to buy a cat w 2 of them w really low hours
Ive overall had good experience with the M2020s I own and with larger MD series on boats in the charter fleet. Good engines, but Volvo screws you royally on parts.

Mine are approaching 4,000 hours now w no major problems.
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Old 08-09-2013, 09:50   #10
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Re: Volvo Penta MD2030D Coolant Loss

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Originally Posted by belizesailor View Post
Ive overall had good experience with the M2020s I own and with larger MD series on boats in the charter fleet. Good engines, but Volvo screws you royally on parts.

Mine are approaching 4,000 hours now w no major problems.
I get parts from Perkins for much less than Volvo.

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Old 08-09-2013, 17:55   #11
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I get parts from Perkins for much less than Volvo.

Mark
Does Perkins use same model codes for engines? If not, is there a cross ref?
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Old 08-09-2013, 17:58   #12
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Re: Volvo Penta MD2030D Coolant Loss

No, and not that I know of. I simply go to transatlantic diesel and look at the parts diagram.

The perkins are Perama MXX - for example the Volvo MD2030 is the Perama M30.

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Old 08-09-2013, 23:41   #13
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Re: Volvo Penta MD2030D Coolant Loss

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Originally Posted by colemj View Post
No, and not that I know of. I simply go to transatlantic diesel and look at the parts diagram.

The perkins are Perama MXX - for example the Volvo MD2030 is the Perama M30.

Mark
You dont happen to who built the motor for the volvo 2003t
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Old 09-09-2013, 06:37   #14
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No, and not that I know of. I simply go to transatlantic diesel and look at the parts diagram.

The perkins are Perama MXX - for example the Volvo MD2030 is the Perama M30.

Mark
Thanks. Will give that a try next time.
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Old 09-09-2013, 07:11   #15
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Exclamation Re: VOLVO PENTA MD2030D COOLANT LOSS

Quote:
Originally Posted by colemj View Post
The clamp/rubber boot connections on the heat exchanger have a problem and the coolant is passing into the raw water side and exiting the boat. It is easy for the exchanger tube to unseat or not seat well in the rubber boot, or for the clamp to break or slip.

Check the hose clamps for breakage, loosen them and make sure the exchanger tube is centered in both ends and clamp them again.

Mark
Hi Mark,
Took me some time to get to the boat and check everything out but the result is disappointing in the sense that there seems to be nothing wrong with the brass heat exchanger tube assembly nor with the clamps or rubber boots. There is not a drop of liquid in these parts when I fill up the coolant tank. The liquid just flows through somewhere else right into the exhaust manifold. Could a blown head gasket be the culprit? But then again is that possible at this rate and without any water in the oil?
Thanks for your attention
Emile
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