mashford
New member
what ways can water enter engine oil is it posable for it to go through saltwater pump ?
water in engine oil
- Thread starter mashford
- Start date
QBhoy
Well-known member
Usual culprits are generally at the interfaces between.
Oil coolers
Raw water cooled engines can suffer this from the manifolds, risers, and heads.
closed cooling can of course suffer similar too.
Id start by thinking around what’s changed between now and last time she was seemingly ok. Think about winterising or lack of it. Has she suffered frost damage? Think about if she’s gained oil level and lost coolant level (if applicable)
Lots of suspects but above are some. Tell us more about it and what engine and cooling system.
Oil coolers
Raw water cooled engines can suffer this from the manifolds, risers, and heads.
closed cooling can of course suffer similar too.
Id start by thinking around what’s changed between now and last time she was seemingly ok. Think about winterising or lack of it. Has she suffered frost damage? Think about if she’s gained oil level and lost coolant level (if applicable)
Lots of suspects but above are some. Tell us more about it and what engine and cooling system.
ChromeDome
Well-known member
What engine?
What symptoms, how did you notice the oil?
Sea- or fresh water cooled?
Any oil leaks?
Other leaks?
If fresh water cooled: Is it building more pressure in the cooling system than normal, bubbles surfacing with filler cap removed at idle?
If yes, check for blown head gasket.
What symptoms, how did you notice the oil?
Sea- or fresh water cooled?
Any oil leaks?
Other leaks?
If fresh water cooled: Is it building more pressure in the cooling system than normal, bubbles surfacing with filler cap removed at idle?
If yes, check for blown head gasket.
coopec
N/A
PLEASE give us some details about your engine/gearbox, type of fuel and cooling system. Is it raw water cooled (i.e cooled by sea water) or does it have a heat exchanger?
Does your engine start straight away or do you have to churn away for a time before it starts?
Without this information it is impossible to work out the problem.
We await your reply.
coopec
N/A
I'm quite sure Mashford will be back to us in due course with the full details. We must all be patient.
vyv_cox
Well-known member
On Bukh engines with the raw water pump driven by the camshaft it can definitely happen. Older pumps had a small tell-tale hole that was easily blocked by grease and paint. If the water seal fails water will pass the oil seal easily if it does not exit via the tell-tale. Later pumps have a larger tell-tale.
Photos of this on my website. Water pumps
Photos of this on my website. Water pumps
coopec
N/A
I'm quite sure Mashford would have done his research before coming to this forum. But this appears to be right on the ball?
Why is there water in my oil in my boat engine?
The water may be entering the crankcase from a blown head gasket, a cracked cylinder head or damaged exhaust manifolds. Have a marine technician make sure this is the cause of your problem. Depending on the extent of the damage, the engine may need rebuilding or replacing.20 Apr 1994
Orlando Sentinel - We are currently unavailable in your region
Why is there water in my oil in my boat engine?
The water may be entering the crankcase from a blown head gasket, a cracked cylinder head or damaged exhaust manifolds. Have a marine technician make sure this is the cause of your problem. Depending on the extent of the damage, the engine may need rebuilding or replacing.20 Apr 1994
Orlando Sentinel - We are currently unavailable in your region
jamie N
Well-known member
As above are all possibilities, I'd like to add syphoning through the raw water system into the wet exhaust and filling up the engine through this.
Been there, done that. I found it quite easy to do and quite hard work to fix!
Been there, done that. I found it quite easy to do and quite hard work to fix!
coopec
N/A
In post #4 I said "Does your engine start straight away or do you have to churn away for a time before it starts? "
I think we are covering the same possibility?
Anyhow we'll know a lot more when Mashford gets back to us.
WoodyP
Well-known member
I had an agricultural engine with wet liners for the cylinders. One of which corroded due to wrong antifreeze being used. I don't know if any marine engines have this arrangement, but it needed an engine rebuild at 5000 hours.
pandos
Well-known member
water dripping onto the engine and can get into the rocker cover or some other opening at the top of the engine. I had this a few years ago....I had alsorts of advice about leaking oil coolers etc turned out to be a bolt hole on top of the rocker cover had a perished rubber, a small rainwater leak was dropping onto the top of the engine and finding it's way into the oil...
jwfrary
Well-known member
Yes there's plenty of larger 400hp plus marine engines with wet liners and as you say correct antifreeze selection ans concentration is essential!
There were also some smaller perkins with wet liners too, probobly still plenty around!
As for water in the oil
Water pump seals isn't uncommon on the close coupled pumos, oil cooler and the head gasket failure depending on the engines layout
mashford
New member
sorry for not being more specific engine is a beta 25hp kubota based did 50 hr oil change then test run on motor to check level itwas okay left for a week then checked again prior to trip after a minute low oil pressure alarm engine stopped and level checked horrible milk coffee coloured oil on dipstick . oil and filter removed and refilled with new oil and filter engine bay is dry no water is part of a twin setup other is same layout and fine i believe the saltwater pump is a johnson gear driven do these have a habit of leaking ? Coolant level is fine. thanks for any assistance.
mashford
New member
no engine bay is dry and in cabin no leaks
mashford
New member
okay will check the raw water pump seal
mashford
New member
have covered most in my latest engine starts imediately no problem diesel freshwater cooled heatexchangerPLEASE give us some details about your engine/gearbox, type of fuel and cooling system. Is it raw water cooled (i.e cooled by sea water) or does it have a heat exchanger?
Does your engine start straight away or do you have to churn away for a time before it starts?
Without this information it is impossible to work out the problem.
We await your reply.
ChromeDome
Well-known member
As a starting point I'd change oil and filter, then leave it witout start for days to see if water gets in when engine is running only.
coopec
N/A
I'm sure the Ferguson tractor and the Perkins 4.108(?) motor has west sleeves
coopec
N/A
Kubota with water in oil.
Kubota with water in oil.
Any Kubota/Diesel experts here?
Any Kubota/Diesel experts here?
Kubota oil in water
Kubota oil in water - Yesterday's Tractors
Kubota with water in oil.
Any Kubota/Diesel experts here?
Any Kubota/Diesel experts here?
Kubota oil in water
Kubota oil in water - Yesterday's Tractors
PaulRainbow
Well-known member
Links to tractors are irrelevant. The OP has a different engine that's also been marinised.
He's also stated that the coolant level does not change, in which case the water in the oil must be saltwater. He needs to check heat exchangers and the water pump.