Modern Engine life expectancy

DAKA

DAKA

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Alright I know there are forum members with 30 year old engines still running sweet as a nut with clouds of pollution but how long should we expect a Tier III modern marine engine to last ?



Cummins new Audi range

3.0 L 265 HP @ 4200 rpm 325 kg V6

4.2L 350 HP 368 kg V8 (that is going to sound gorgeous )

Volvo Penta D3 2.4 L 225 hp
Volvo Penta D6 5.5(edited thks davy n paul) 370HP @ 3500 rpm

Are these still going to be going strong after 10 years ?

I cant help but feel the planet would be best served with a lump of metal that lasts 30 years with a bit of black soot instead of modern pollution free lump of metal that needs replacing along with the upholstery every 8 years.
 
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D 4 3.7 litres

D6 5.5 litres

I cant see the point in a v6 diesel from an automotive base unit it a boat especially with a vvt turbo, imagine 6 injectors to pay for when they fail, and from automotive history at my local bosch dealer they will, plus how heavy is it compared to volvos range of engine, what the hp to weight ratio of these new vw/audi/skoda base units.
 
volvopaul said:
D 4 3.7 litres

D6 5.5 litres

I cant see the point in a v6 diesel from an automotive base unit it a boat especially with a vvt turbo, imagine 6 injectors to pay for when they fail, and from automotive history at my local bosch dealer they will, plus how heavy is it compared to volvos range of engine, what the hp to weight ratio of these new vw/audi/skoda base units.
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The V6 engines are very refined. Different world from the large capacity I4 Volvo. Great engine in a car, but how they stand up to the strains of a planing boat will be interesting. In many ways it will depend on the resilience of the installation. If the oil and water temps are properly managed, plus the duty cycle, then they should be good for many years, as they are lifed for 300,000 km before major work.
 
volvopaul said:
D 4 3.7 litres

D6 5.5 litres

I cant see the point in a v6 diesel from an automotive base unit it a boat especially with a vvt turbo, imagine 6 injectors to pay for when they fail, and from automotive history at my local bosch dealer they will, plus how heavy is it compared to volvos range of engine, what the hp to weight ratio of these new vw/audi/skoda base units.
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What's the base engine for the V6 VW engine ?

The 2.5 litre VW V6 was a nice engine, went well, but was the greediest diesel car i've ever owned.

If we're talking marinised car engines, i'll have a properly done Mercedes 3.2 CDi, straight six please.
 
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PaulGooch said:
What's the base engine for the V6 VW engine ?

The 2.5 litre VW V6 was a nice engine, well well, but was the greediest diesel car i've ever owned.

If we're talking marinised car engines, i'll have a properly done Mercedes 3.2 CDi, straight six please.
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Fraid you cant!

Inline 6 OM648 320 CDI has been replaced by V6 OM 642 320 CDI, I am with you, an inline 6 man!

However we have what we have, modern LDA (Light Duty Automotive) engines in V format will do the job, and work very well in outdrive installations which I refuse to have anything to do with.

Base motor durability will not be an issue, my last Audi A6 diesel did 246k with just an alternator and VGT turbo and was not using lube. Current Mercedes 2.2 OM 611 CDI is OK at 145K. None of this is unusual. Base motor durability is the not the issue at all.

Big deal will how the marinisation stands up. The BMW marinisation by Steyr/Magna is and Volvo Gen1 D3 is textbook example of how NOT to do it. How these engines stand up to 'Marine age' will be in quality and durability of marine hang on's.

There appears to be some confusion between durability and reliability here. Yet to come across leasure boater who has ever explored durability of a marine diesel motor.

No point including Volvo D4/6 here different class of motor (Mid range) CMD QSB and D6 are direct comparisons, D4 kind of on its own.

I am a total convert to clean sociable marine engines and have zero time for smokey junk.
 
Getting two big ships on the same course is never easy.

My understanding is that integration of supply chain and most importantly warranty system integration is proving to be a very big task. Cummins people are working in the VW Marine facility and VW people have been working in Darlington to understand each others quality systems. Presenting a common face to the customer will not be easy.

Spent a weekend recently with a CMD dealer who had also been a VW Marine dealer. Dealer thought VW was a good marinisation with nice features like built in lube change pump. Big beef was that Cummins listen to the dealers VW do not, dealer feedback is not welcome, joining up two different cultures will not be easy. Cummins have at last accepted Finning VW training and certification and waived the need to re-train.

Dealer in question still has orders for QSL 2 and 2.8's which are still being fulfilled, and will not be happy to lose them.

US was a complete buggers muddle. VM/Mercruiser support was vested in either Detroit or Mercruiser dealers. Owners of OEM installed Mercruiser VM's had a tough time as majority of CMD dealers did not have Rinda diagnostic tool. Many CMD dealers were dual Yanmar franchises where 4HLA or 6LP covered the power node below Cummins products, why switch when this product worked and had excellent reputation.

Integration of the two brands may prove easier in worlds biggest marine market than in Europe.

The Miami show should start pulling it all together. http://www.cmdmarine.com/Product2/VW_index.html
 
PaulGooch said:
What's the base engine for the V6 VW engine ?

The 2.5 litre VW V6 was a nice engine, went well, but was the greediest diesel car i've ever owned.

If we're talking marinised car engines, i'll have a properly done Mercedes 3.2 CDi, straight six please.
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Paul, I don't recall a 2.5 V6D, although there was an I5 D 2.5 mainly used in the VW light commercials, also in Volvo cars. The curren VW Group 3l V6 is a good engine, hauling some large 2+ tonne vehicles, in Tourag and Cayenne, so are designed to work hard on the Germa autobahns. Base engine is strong and refined. As ever in a boat, it is the marinisation and installation that is important for reliability. Auto electronics are well screened and sealed, and should be reliable. V8D is a monster, and an great engine in the right tub.
 
I take it that the V6 and V8 diesel engines are the marinised versions of the same engines which appear in the A8 etc? Both are good engines and the V8 is a stonker, at least in the A8 it is. The power outputs of the marine engines are similar to the power outputs of the car engine versions so I guess you'd expect them to last as long in terms of hours. 200k road miles is equivalent to 5000hrs. I dont know, would that be a fair estimate of life expectancy of the marine engine before major overhaul?
 
rafiki_ said:
Paul, I don't recall a 2.5 V6D, although there was an I5 D 2.5 mainly used in the VW light commercials, also in Volvo cars. The curren VW Group 3l V6 is a good engine, hauling some large 2+ tonne vehicles, in Tourag and Cayenne, so are designed to work hard on the Germa autobahns. Base engine is strong and refined. As ever in a boat, it is the marinisation and installation that is important for reliability. Auto electronics are well screened and sealed, and should be reliable. V8D is a monster, and an great engine in the right tub.
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Not thinking of the inline 5 pot, the 2.5 V6 TDi was fitted to the Passat, A4, A6 etc 1996-2000 ish. Good engine, went very well in the Passat, but horribly greedy if you put your foot down.
 
DAKA said:
Alright I know there are forum members with 30 year old engines still running sweet as a nut with clouds of pollution but how long should we expect a Tier III modern marine engine to last ?



Cummins new Audi range

3.0 L 265 HP @ 4200 rpm 325 kg V6

4.2L 350 HP 368 kg V8 (that is going to sound gorgeous )

Volvo Penta D3 2.4 L 225 hp
Volvo Penta D6 5.5(edited thks davy n paul) 370HP @ 3500 rpm

Are these still going to be going strong after 10 years ?

I cant help but feel the planet would be best served with a lump of metal that lasts 30 years with a bit of black soot instead of modern pollution free lump of metal that needs replacing along with the upholstery every 8 years.
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What makes you think Volvo's D series engines will need replacing after 8yrs?

Properly looked after, I would consider a modern boat engine to be just run-in after 8yrs! Will probably have only done 400-600 hrs on average.
 
MikeJ42 said:
What makes you think Volvo's D series engines will need replacing after 8yrs?

Properly looked after, I would consider a modern boat engine to be just run-in after 8yrs! Will probably have only done 400-600 hrs on average.
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At the time of posting I thought the D6 was 3.3 L, since altered my post.

The forum has seen at least two D3 engines replaced under 3 years old.
There have been D series engines listed on boats and outboards as scrap along with a CMD 4.2L which was under 8 years old.
Another report of a CMD 4.2L that was rebuilt under 8 years old.

Perhaps I am being pessimistic but when a Manufacturer (Volvo Penta) only offers a 2 year warranty on an engine it doesnt bode well.

Anyone know if the new CMD Audi/VW engines come with a 2 or 6 year warranty ?
 
would like to see one of these marinised...:):rolleyes:

V10-TDI.jpg
 
I haven't got anything relevant to say about modern motors, but mine are a lot more than 30 years old and going strong.

The old girl is coming up for her 45th birthday.
 
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