Emulsified oil in Volvo penta 2002

[paw-paw]

Went to the boat tonight and discovered the engine oil emulsified. The engine is a Volvo penta 2002 raw water cooled. The engine is NOT seized and had previously been running with no apparent problems (apart from this one). My first inclination is the seal on the sea water pump, I will investigate this tomorrow. Can anyone suggest any other causes that I could investigate? (Does this engine have an oil cooler etc)

Many thanks in advance

Paw

 

[philip_stevens]

The gearbox has an oil cooler, but I don't think the engine does. It could be as you suggest and be the lip seals on the raw water pump.

You need to check that the drip hole in the drive shaft has not clogged, and the water is being forced into the sump.

If it is the seals, you can get service kits from the likes of ASAP-Supplies.

 

[pvb]

The 2002 doesn't have an oil cooler. A leaking seal on the seawater pump is highly unlikely to lead to water in the engine - it just pours out of the hole in the pump housing instead.

 

[VicS]

Went to the boat tonight and discovered the engine oil emulsified. The engine is a Volvo penta 2002 raw water cooled. The engine is NOT seized and had previously been running with no apparent problems (apart from this one). My first inclination is the seal on the sea water pump, I will investigate this tomorrow. Can anyone suggest any other causes that I could investigate? (Does this engine have an oil cooler etc)

Many thanks in advance

Paw

By all means check the water pump. If water leaks past the water seal it should dribble from the weep hole mentioned. Unless the hole is blocked it will need a severe leak to pass through the oil seal into the crankcase.

As a matter of urgency check your antisyphon loop and vent valve if fitted.

 

[oldharry]

By all means check the water pump. If water leaks past the water seal it should dribble from the weep hole mentioned. Unless the hole is blocked it will need a severe leak to pass through the oil seal into the crankcase.

As a matter of urgency check your antisyphon loop and vent valve if fitted.

I have had this happen, even though the seals did not apper too badly worn. The drip hole: seems to block very
ssily and quickly once the seals strt to leak.

 

[paw-paw]

Many thanks.
I am heading down to the boat today and will check those things out and let you know how I get on.

Paw

 

[Dipper]

I've just replaced the seals on my Volvo 2001 water pump but the water was dripping out of the weep hole. The weep hole is actually quite large and is a series of large gaps surrounding the shaft. There is a second seal for the oil.

If it does turn out to be the seal, Keypart do several kits depending on whether the shaft is worn. The cheapest kit for £12 worked on my pump and is quite easy to fit. You do need circlip pliers to take it apart.

 

[West Coast]

I've just replaced the seals on my Volvo 2001 water pump but the water was dripping out of the weep hole. The weep hole is actually quite large and is a series of large gaps surrounding the shaft

+1. I had a similar problem in the past with an old Bukh engine, where the hole between the seals of the water pump became clogged, and failed seals allowed water to be forced into the engine. However, with my 2003, the water pump hole is actually larger slots, which must be almost impossible to block in the same way

 

[philip_stevens]

Went to the boat tonight and discovered the engine oil emulsified. The engine is a Volvo penta 2002 raw water cooled. The engine is NOT seized and had previously been running with no apparent problems (apart from this one). My first inclination is the seal on the sea water pump, I will investigate this tomorrow. Can anyone suggest any other causes that I could investigate? (Does this engine have an oil cooler etc)

Many thanks in advance

Paw

This jpg is of a pdf is of a typical Johnson pump. Not sure where I downloaded it from originally.

View attachment 43240

 

[paw-paw]

I have stripped the pump, the bearings are rough and the shaft has light scoring on it. I will either refurb or replace the pump. How ever I have to agree that I do not think this is the cause of my problem as the housing has slots for the water to weep and they were not blocked. I checked for an anti syphon valve but there is none fitted. I remover the exhaust hose from the vetus silencer box and there was only the smallest amount of water present as you would expect. Also I have had the boat on a mooring for a number of years through all kinds of weather and had nothing like this ever happen. I am wondering what to check next. Is it worth while checking the exhaust elbow? Or the cylinder head gasket? Also any idea how I could pressure check the gasket? I don't think it is leaking into the cylinder as it has not been smoking, but possibly just between the water and oil? I am a bit reluctant to remove the head unless absolutely nessesary.

Many thanks

Paw

 

[Alapusan]

I have stripped the pump, the bearings are rough and the shaft has light scoring on it. I will either refurb or replace the pump. How ever I have to agree that I do not think this is the cause of my problem as the housing has slots for the water to weep and they were not blocked. I checked for an anti syphon valve but there is none fitted. I remover the exhaust hose from the vetus silencer box and there was only the smallest amount of water present as you would expect. Also I have had the boat on a mooring for a number of years through all kinds of weather and had nothing like this ever happen. I am wondering what to check next. Is it worth while checking the exhaust elbow? Or the cylinder head gasket? Also any idea how I could pressure check the gasket? I don't think it is leaking into the cylinder as it has not been smoking, but possibly just between the water and oil? I am a bit reluctant to remove the head unless absolutely nessesary.

Many thanks

Paw

Hi Paw,
I have the same problem on my Volvo engine. What was the problem on yours? Did you manage to fix it?

Cheers,

Alex

 

[fredrussell]

Hi Alapusan. Can’t help with your query but I reckon you would do better starting a new thread as paw-paw hasn’t posted on the forum since 2014. Plenty of other knowledgeable types on here who will be able to help I reckon. Good luck.

 

[Alapusan]

Thank you!