AD41P help please

[Sailorsam101]

I'm stuck in yarmouth with a bit of a problem.

Got here no problems and both engines running well and up to the rights temps etc.

Left boat for dinner but got back to a foul smell in the cockpit. Traced it to the engine bay and found that the port engine has dumped its entire coolant into the bilge. Can't see anything obvious yet but will look in the daylight.

The smell is burning rubber type smell. But again it didn't smell when we left the boat earlier.

Any ideas folks?

 

[dragoon]

Impeller overheated and melted due to lack of raw water flow, and engine overheated?

Just a guess, but that will create a rubber burning smell. Hope everything is okay, but I advise to never leave engines running unattended.

 

[Plum]

If the engine had been overheating it would have blown some coolant out of the pressure cap, but not the whole lot. As far as i can see the only way to lose the lot would be from a leaking hose. Without the coolant the engine would then overheat but assuming your temperature alarm was working you must have got into port just in time so no damage done. Once a hot engine is switched off the excessive temperature in the combustion area will dissipate and travel to other parts which just may explain the delayed burning smell. Hope you sleep well.

Www.solocoastalsailing.co.uk

 

[Sailorsam101]

Cheers gents. The engine was off when I left it.

It's like it failed after I turned it off as the temps were perfect all the way here. I checked the raw water I inlet and that's fine.

Tomorrow I'll change the impeller and fill the coolant up the watch for a leak. If all else fails I've got seastart.

 

[[2068]]

When it’s light, have a poke around with a torch near the exhaust manifold - when I overheated an AD31, a suprisingly large amount of coolant ended up in the bilge from the expansion tank, and the paint on the exhaust manifold went a bit crispy (smelt bad). Could also be a cooked impeller.

In my case it was new water pump belts, coolant top-up and a spray from a can of green paint.
Check impeller, belts, pump, strainer, outdrive etc.

The fact that it failed when you turned it off suggests that temps on the freshwater side were marginal when it was running, and the sudden loss of saltwater circulating plus heat in a still-very-warm engine was enough to send things over the edge.

.

 

[QBhoy]

Check the seal around the fw header tank, if applicable. Happened on the old man's tamd61 other year.
If it's more serious, as above advice and also check the oil for water ingress

 

[Sailorsam101]

So I filled it up with water... checked the impeller and now all is fine and I cant find a leak.

I've called seastart out to come have a look as I'm beyond what I know

 

[Sailorsam101]

It a leaking freshwater pump. Can't fix it here so need to watch water level and see how I go.
No idea on the smell though.

 

[petem]

It a leaking freshwater pump. Can't fix it here so need to watch water level and see how I go.
No idea on the smell though.

Good night at the pub was it !?

 

[QBhoy]

Likely won't leak until up to temps and pressures?

 

[Sailorsam101]

Anybody changed a pump themselves?

Is it a tough job? Looks straight forward to me.

 

[dragoon]

Anybody changed a pump themselves?

Is it a tough job? Looks straight forward to me.

I did one of my 40 series. Make sure you've soaked the bolts in penetrating fluid before undoing and that the gasket face is clean before replacing the pump with a new gasket. It wasn't that hard, but I had to remove the heat exchanger. Not sure if yours is the same in that regard or not.