scurr
Member
What are we thinking? It’s engine maintenance time, and the question always needs to be fix up or replace. Annoying the d2 40 isn’t made anymore. 50 is 70kgs more.
Md2040 woes
- Thread starter scurr
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scurr
Member
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Ammonite
Well-Known Member
Depends on whether you are doing it yourself. Most of the parts are readily available from Parts4engines including a full engine rebuild kit
https://parts4engines.com/collectio...oducts/volvo-penta-md2040-engine-overhaul-kit
One exception is the heat exchanger which is silly expensive although I suspect the core will clean up. The body of the HE is circa £2k and you will struggle to find a decent 2nd hand one as the exhaust outlet suffers from galvanic corrosion, although you can get them rewelded by someone who knows what they are doing. What's yours like?
Also, do you know why it's was removed? They are decent engines and while they can be rebuilt the cost of the ancillaries will rapidly rack up if you need them.
If you need to pay someone to rebuild it I'd be looking at a Beta 35. It doesn't develop quite as much power but it does this at much lower rpm so is more usable in practice. Its also a lot cheaper and lighter than the D2-50.
https://parts4engines.com/collectio...oducts/volvo-penta-md2040-engine-overhaul-kit
One exception is the heat exchanger which is silly expensive although I suspect the core will clean up. The body of the HE is circa £2k and you will struggle to find a decent 2nd hand one as the exhaust outlet suffers from galvanic corrosion, although you can get them rewelded by someone who knows what they are doing. What's yours like?
Also, do you know why it's was removed? They are decent engines and while they can be rebuilt the cost of the ancillaries will rapidly rack up if you need them.
If you need to pay someone to rebuild it I'd be looking at a Beta 35. It doesn't develop quite as much power but it does this at much lower rpm so is more usable in practice. Its also a lot cheaper and lighter than the D2-50.
scurr
Member
I had the engine pulled out to change the gasket on the sump, the engine mounts and exhaust elbow. There was corrosion showing on heat exchanger so asked for it to be checked. Engine was running ok, but very small amount of oil leaking from gasket. Started fine, 1-2 seconds of white smoke on start then fine.
Tranona
Well-Known Member
That is a 3 cylinder MD2040, not a D2 40 which is the later 4 cylinder. So well over 20 years old. all parts are available but as suggested expensive, particularly the heat exchanger. Yanmar 3JH40 is a 3 cylinder replacement - the Beta is bigger as it is 4 cylinder. What boat is it in?
scurr
Member
It is a md2040. I would have liked to have upgraded to a d2 40 if upgrading. But it stopped being made in 2016. The 50 is a bit big / heavy. D1 30 opposite in too small.
yotter
Well-Known Member
Does it not just need some gaskets changed and a cleanup including the heat exchanger tubes. Then some green paint from parts4engines.
PaulRainbow
Well-Known Member
He does say it's a MD2040 in the thread title.
Ammonite
Well-Known Member
That might be the case but I wouldn't want to put it back in again without at least doing a compression test, and ideally a leak down test. If you've gone to the trouble of removing it you might as well see if there are any major issues before you stick in back in. It depends on how long you plan keeping it.
