I could be wrong, but surely this isn't right?!

Water pump outer seal leaking.

If the greenish lump of gung is your water pump then the outer (water) seal is knackered and you should change it post haste. You should also chage the oil seal which is on the same shaft but ensure you leave a space between the seals. Big danger of pumping seawater direct into sump if the inner (oil) seal fails.

J.
 
Jcorstorphine said:
If the greenish lump of gung is your water pump then the outer (water) seal is knackered and you should change it post haste. You should also chage the oil seal which is on the same shaft but ensure you leave a space between the seals. Big danger of pumping seawater direct into sump if the inner (oil) seal fails.

J.
Click to expand...

Thanks J,

Yes, that's the water pump. Please forgive my ignorance but I take it that hole is supposed to be there, it just shouldn't be pumping water out like there's no tomorrow?

Best I get some new seals ordered.....
 
James W said:
Thanks J,

Yes, that's the water pump. Please forgive my ignorance but I take it that hole is supposed to be there, it just shouldn't be pumping water out like there's no tomorrow?

Best I get some new seals ordered.....
Click to expand...

The hole is a tell tale to tell you the seal is worn. Well it is on my yanmar water pump so most likely is on a Volvo :)
 
Check the oil in the crankcase by looking carefully at the dipstick. There could well be seawater in there, evident by grey colour and possibly water droplets. In which case an emergency oil change is indicated.
 
James W said:
Thanks J,

Yes, that's the water pump. Please forgive my ignorance but I take it that hole is supposed to be there, it just shouldn't be pumping water out like there's no tomorrow?

Best I get some new seals ordered.....
Click to expand...

Hi,

It’s not a difficult job to do but it is easy to get it wrong.

You should order new seals, a face gasket for the pump, a gasket for the engine flange and even get a new impeller. However it may be best to strip the pump first as it may be cheaper to get a new pumps if the pumps is damaged.

The usual procedure is as follows.

Close the engine seacock
Disconnect the hose to and from the pump.
Remove the pump from the engine.
Put a rag in the hole to prevent any items from falling into the engine.
Take a photo with your phone of the pump
Observe the rotation of the pump
Remove the 6 brass screws
Prise off the cover but try and not damage the sealing face,
Observe which way the impeller is lying (take a photo)
Remove the impeller
Tap out the shaft
You will now see the seals.
The first seal you see is the water seal. (take photo)
You should be able to see a stainless steel spring in the seal facing you.
Prise out this seal
There will now be a second seal (Take photo)
This seal will have the spring facing away from you
Prise out this seal.
Clean up the sealing areas.
Fit the first seal such that the seal has the spring facing away from you
Fit the second seal such that the seal has the spring facing you.
Do not push the second seal in too far or it will block the small drain hole
Make sure that the seal is sitting square.
Examine the shaft for a witness mark (ring) where the seal beds into the shaft
If the ring is very deep you may just get away with a light polish with 3M pad
Lightly oil the shaft
Shaft can now be fitted but take care not to damage the seals with the splines
Fit the Impellor with the lobes bent in the same direction as they came out
Smear some Impeller lubricant and turn the shaft
Fit new gasket with a little grease to hold it in place.
Fit the cover and evenly tighten up the 6 screws.
Make sure that the pump turns
Clean off the sealing area on the engine
Fit new gasket
Refit the pump to the engine by aligning the drive dog with the one on the engine
Tighten up the bolts.
Trickle a little water into the outlet of the pump and refit the connections
Open seacock
Run the engine and check for water coming out of the exhaust
Check engine and pipe for leaks.


PS One little tip which I forgot to mention is to cover the splines with a single layer of sellotape so that the spines do not damage the seals when fitting the shaft. Then remove the sellotape.
 
Last edited:
Amazing as always!

Vyv and J,

Thanks so much the advice. J, that checklist is all I could have ever hoped for, it's a step by step manual!

Another example of how good this forum is! :D
 
Jcorstorphine said:
Hi,

It’s not a difficult job to do but it is easy to get it wrong.

You should order new seals, a face gasket for the pump, a gasket for the engine flange and even get a new impeller. However it may be best to strip the pump first as it may be cheaper to get a new pumps if the pumps is damaged.

The usual procedure is as follows.

Close the engine seacock
Disconnect the hose to and from the pump.
Remove the pump from the engine.
Put a rag in the hole to prevent any items from falling into the engine.
Take a photo with your phone of the pump
Observe the rotation of the pump
Remove the 6 brass screws
Prise off the cover but try and not damage the sealing face,
Observe which way the impeller is lying (take a photo)
Remove the impeller
Tap out the shaft
You will now see the seals.
The first seal you see is the water seal. (take photo)
You should be able to see a stainless steel spring in the seal facing you.
Prise out this seal
There will now be a second seal (Take photo)
This seal will have the spring facing away from you
Prise out this seal.
Clean up the sealing areas.
Fit the first seal such that the seal has the spring facing away from you
Fit the second seal such that the seal has the spring facing you.
Do not push the second seal in too far or it will block the small drain hole
Make sure that the seal is sitting square.
Examine the shaft for a witness mark (ring) where the seal beds into the shaft
If the ring is very deep you may just get away with a light polish with 3M pad
Lightly oil the shaft
Shaft can now be fitted but take care not to damage the seals with the splines
Fit the Impellor with the lobes bent in the same direction as they came out
Smear some Impeller lubricant and turn the shaft
Fit new gasket with a little grease to hold it in place.
Fit the cover and evenly tighten up the 6 screws.
Make sure that the pump turns
Clean off the sealing area on the engine
Fit new gasket
Refit the pump to the engine by aligning the drive dog with the one on the engine
Tighten up the bolts.
Trickle a little water into the outlet of the pump and refit the connections
Open seacock
Run the engine and check for water coming out of the exhaust
Check engine and pipe for leaks.


PS One little tip which I forgot to mention is to cover the splines with a single layer of sellotape so that the spines do not damage the seals when fitting the shaft. Then remove the sellotape.
Click to expand...
Good description. Here it is in pictures
 
Last edited:
I'm a bit worried bechause of the amount of water running out of your pump. I would have checked if the shaft or pumphouse are worn out.
 
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