One engine still smoking help

So spoke to engineer he has found oily gunge in the exhaust ports so he thinks the water is coming from that area turbo etc so going to check all that
 
valve stem oil seals are rubber, and over time get work hardened or through lack of use will also lose the flexibility, like you foreskin if you like. LOL As the engine runs oil is circulated around all the engine not just the sump, but upstairs as well in the rocker cover, and normally drains back down through galleries into the sump, in order to stop oil getting into the combustion chambers the valves are fitted with these seals, if these become worn then oil will get past them. But as you have already had the head off I presume this was investigated and rectified on the rebuild?
 
omega2 said:
valve stem oil seals are rubber, and over time get work hardened or through lack of use will also lose the flexibility, like you foreskin if you like. LOL As the engine runs oil is circulated around all the engine not just the sump, but upstairs as well in the rocker cover, and normally drains back down through galleries into the sump, in order to stop oil getting into the combustion chambers the valves are fitted with these seals, if these become worn then oil will get past them. But as you have already had the head off I presume this was investigated and rectified on the rebuild?
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hi thanks omega ,the head has been fully refurbed we are still trying to find where the water has come from ,the only thing we have found is the oil cooler bolts were loose so water could have got in there but not convinced
 
So update so far had enderscope in engine today all seems ok ,so we are still trying to find where water has got in the oil,it can't be the sea water pump as it would leak water before it could get past the oil seal by the gear so we have taken the turbo ,and where the water joins the exhaust ,could the sea water get back in to the oil lube on the turbo , PS the turbo is partly seized up thanks for any help roy
 
Can you get the oil cooler out and subject it to a pressure test? Leave the oil ports unblanked top up the water side and vent off and then apply pressure preferably with a positive displacement pump, failing that to domestic fresh water pressure. Then see what appears at the lowest oil port.
 
NormanB said:
Can you get the oil cooler out and subject it to a pressure test? Leave the oil ports unblanked top up the water side and vent off and then apply pressure preferably with a positive displacement pump, failing that to domestic fresh water pressure. Then see what appears at the lowest oil port.
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Hi Norman we have got the oil cooler off it is being cleaned at the moment as full of oily sludge but we think it is sea water and the oil cooler only comes into near contact of the oil cooler
 
seastoke said:
Hi Norman we have got the oil cooler off it is being cleaned at the moment as full of oily sludge but we think it is sea water and the oil cooler only comes into near contact of the oil cooler
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Sorry I do not understand this part of your answer 'and the oil cooler only comes into near contact of the oil cooler'

Of course the oil side of the cooler will look like the rest of the salt water contaminated side of the engine and the cooler will require thorough cleaning. If it is salt water cooled then I would recommend fitting new seals and testing before refitting to the engine.
 
NormanB said:
Sorry I do not understand this part of your answer 'and the oil cooler only comes into near contact of the oil cooler'

Of course the oil side of the cooler will look like the rest of the salt water contaminated side of the engine and the cooler will require thorough cleaning. If it is salt water cooled then I would recommend fitting new seals and testing before refitting to the engine.
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Oh this engine oil cooler is in the coolant loop, not the raw water. Its also not possible to pressure test it as a stand alone unit as its partly integral to the block. It is a likely culprit as in tractor circles it is known to be an issue.

This engine also has an odd wasted turbo, air cooled volute, covered in a jacket, they can suffer corrosion under the jacket and the waste gate actuator can stick.
 
burgundyben said:
Oh this engine oil cooler is in the coolant loop, not the raw water. Its also not possible to pressure test it as a stand alone unit as its partly integral to the block. It is a likely culprit as in tractor circles it is known to be an issue.

This engine also has an odd wasted turbo, air cooled volute, covered in a jacket, they can suffer corrosion under the jacket and the waste gate actuator can stick.
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Do you think he water could get into the oil around the turbo area
 
burgundyben said:
Given its an air cooled turbo, no, I don't think so.

Did you say the oil cooler bolts were loose? IIRC the oil cooler is a sandwich late type affair? How did the gaskets look?
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hi the gaskets looked good ,the problem we cant understand how does the oily gunge get into exhaust ports
 
seastoke said:
Hi Norman we are not burning oil it's that water has got into the oil first problem and turned it into oily gunge but also how does the gunge get into exhaust ports thanks for taking an interesr
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Hi - I am clutching at straws here but I have reread your thread in toto again.

1. What was the results of your injector tests?
2.I am a bit of a loss when you say you are not burning oil - you made this statement earlier in the thread:

it always happens when i i am in Wales ,so we have lost coolant out of the sealed system ,which is cooled by raw sea water , The engine oil level has gone up ??? and after taking the manifold cover off there is rust on springs etc. has anyone seen this before.

3. Now it maybe that the exhaust ports have excessive carbon deposited through low load running and poor combustion. If water has been entering the sump and the oil level has risen, oil could be pumped over into the exhaust when the engine is cold. This oil would then adhere to the carbon (soot). I have seen this on other engines caused by incorrect valve timing.

4. Have you at any stage done a compression test?

5. Lots of questions I know and you still have to get to the source of the water leak. One test I have done in the past is to stick an exhaust gas analyser into the header tank - if you get combustion gases present there it confirms you have a defective head gasket/cracked head whatever, conversely if the header tank is 'clean' it is fairly positive proof you are in the clear on the aforementioned paths and the leak is elsewhere.

That's the best I can come up with from remote, perhaps those more familiar with the specific engine type can help.
 
NormanB said:
Hi - I am clutching at straws here but I have reread your thread in toto again.

1. What was the results of your injector tests?
2.I am a bit of a loss when you say you are not burning oil - you made this statement earlier in the thread:

it always happens when i i am in Wales ,so we have lost coolant out of the sealed system ,which is cooled by raw sea water , The engine oil level has gone up ??? and after taking the manifold cover off there is rust on springs etc. has anyone seen this before.

3. Now it maybe that the exhaust ports have excessive carbon deposited through low load running and poor combustion. If water has been entering the sump and the oil level has risen, oil could be pumped over into the exhaust when the engine is cold. This oil would then adhere to the carbon (soot). I have seen this on other engines caused by incorrect valve timing.

4. Have you at any stage done a compression test?

5. Lots of questions I know and you still have to get to the source of the water leak. One test I have done in the past is to stick an exhaust gas analyser into the header tank - if you get combustion gases present there it confirms you have a defective head gasket/cracked head whatever, conversely if the header tank is 'clean' it is fairly positive proof you are in the clear on the aforementioned paths and the leak is elsewhere.

That's the best I can come up with from remote, perhaps those more familiar with the specific engine type can help.
Click to expand...

we have not done compresion test ,the injectors all need a refurb so the company says ,the head has had a full refurb one suggestion has been where where the sea water joins the exhaust near the tubo it could injest into the oil but i dont understand
 
yes yes yes, great news at last we have found where the sea water has got in .where the sea water joins the exhaust the pipe is leaking water in so we need to get new bits gaskets ant turbo sorted head on etc will take a while ,will keep updates ,and THANKS for all help and support exited about boating again cheers roy.
 
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