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post #41 of 44 Old 06-09-2012
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Re: How to destroy a diesel in one easy step...

Originally Posted by davenewhaven View Post
Not watching the dock boy fueling your deisel tank with gasoline.
So this happened to you? Did it completely kill the engine?

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post #42 of 44 Old 09-27-2012
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Re: How to destroy a diesel in one easy step...

Another tricky one...
My Volvo MD2020 started overheating, at the point of stalling. It ran fine for years. I tried today to repeat the event at the dock, without actually stalling. Guess what?! The heat exchanger cap is busted...or something. After running the engine in gear for 15 min. at 2500 rpm, I noticed a trickle coming out of the heat exchanger overflow. Spatten Octoberfest bottle was right there, so I commandeered it to act as an overflow container.
It started filling up slowly, but when I slowed down to an idle, the overflow started gushing, and dumped about half a quart... So, the engine is losing its coolant... A friendly lobsterman suggested bad heat exchanger cap... I was looking at it and thinking to myself.... this piece of spring and rubber could kill! And not only the engine, but the people on board, in the right circumstances...
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post #43 of 44 Old 09-28-2012 Thread Starter
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Re: How to destroy a diesel in one easy step...

Originally Posted by arf145 View Post
So this happened to you? Did it completely kill the engine?
It's not likely that filling (and running) a diesel with gasoline would be fatal. I used to work for a private ambulance company and all our ambulances were diesel and most of our crews were inexperienced (high turnover) and sleep deprived because of our 24 hr shifts.

Many a diesel rig was fueled with diesel and driven away. Apparently it makes sounds that aren't so good.... but it never destroyed one that I know of.

The procedure was for the company's mechanic to invent new names for you and try them out to your face. He then would drain the fuel system and pull the head of the engine. Apparently the gasoline would all evaporate and he could just put the head back on, refill the system and carry on. He always said that putting diesel in a gas engine was worse because it wouldn't evaporate. This was also the reason, he said, that at the pump the diesel nozzle won't fit into a gas engine's fill port but a gas nozzle will fit into a diesel fill port.


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post #44 of 44 Old 09-28-2012
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Re: How to destroy a diesel in one easy step...

Oil pressure failure is probably the single most destructive event.
Install an audible alarm - you can easily build one yourself from an old automobile relay and automobile horn. Last one cost be about $6 in total, in 1995, and it is still workingfine.

Overheating is next, I suppose. Keep an eye on your motor coolant temperature.

On the point of timing belts. Do not install a marine diesel with an OHC engine. Simply avoid the type. Install an OHV motor (pushrods). Marine diesels do not rev high enough to justify an OHC motor. Avoid. Leave the type for motorcycles, or performance automobiles.

Keep the oil clean.

Be careful with prolonged cranking.

I made a decision a long time ago to remove the engine side covers so I could keep an eye on what was happening in there constantly. I have the luxury of instant access to the motor and I can check the vital signs before they get out of hand. You would be surprised what a wee bit of constant TLC can do.... hand on gearbox to check temperature, constant checking of engine mounts, hand on cylinder heads, on the exhaust elbow, hand on the electrical fuel pump to check it is working, and a big oil pressure gauge staring me in the face. I can even tell when I need an oil change - it drops below 30 psi on a long run.

Also, with the engine exposed perhaps I can get an earlier warning of a fire in there? Perhaps.


Last edited by Rockter; 09-28-2012 at 06:57 AM.
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