[Diesel engine warm-up]

Like so many threads on here, people are trying a "one size fits all" answer for all engines, even though all engines are clearly not the same.

My one is a Barrus Shire 33 in a 42ft narrowboat.

[Diesel engine warm-up]

The problem is that you think it is a science.

 

It is actually a black art.

 

Yes, that's what I suspected... being a scientist myself..

 

Still it is worth reviewing the state of the (black) art.

[Diesel engine warm-up]

With any petrol/diesel engine, you should give it several bursts of acceleration immediately after it fires up. This is to ensure the top of the engine is flooded with lubrication. Firing up and letting it immediately settle to low revs can leave the various high-up bearings dry because the oil is still very thick and the oil pump will not be providing much pressure to drive the oil around. So splash your engine with oil the second it fires up!

 

The answers are getting really interesting, and contradicting. So far my conclusion:

 

Start the engine, let it run for 2-3 minutes, then sail away with a gentle speed.

 

I haven't yet reached the conclusion regarding the revs.

 

 

Further theoretical interest: can anyone point me to the right resource on explaining the physics of engine wear in the warm-up period?

[Diesel engine warm-up]

That is what I have always believed. Running a 'cold' engine off-load for long periods may cause expensive and unnecessary wear.

 

I also prefer this explanation, but I've heard that some engines (Volvo Penta?) have dedicated governor that will not let you go unless the operating temperature is reached. That's why I got confused.

[Diesel engine warm-up]

Hi,

 

I'm trying to figure out what's the best practice for warming up a marine diesel engine? For how long? At what revs? Especially when you don't have a temperature gauge...

 

Thanks!

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