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Ruggerini engine just rebuilt


Ant cole

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Yes, a water cooled manifold is a simply a water space surrounding the manifold.

 

The plug which leaks may either be a core or welch plug put there to fill the hole needed as part of the making of the water space, or a tapping for a water pipe to or  from something like a cab heater.

N

P.S.  .As it is an Italian engine it probably needs an Italian tune-up.  

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We have given it a damn good hiding , , I’ll adjust the fuel adjust smoke screw to give it more power , as that was lowered to reduce fuel as valves seemed a bit coked up when we had the head off , that makes quite a difference on top speed of boat . .. it’s basically a mechanical rod to alter fuel amount , pump is preset , the only thing we can’t find is how to check timing , there are no marks on crank ,

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It could be retarted, that can make it smoke. Did you own this engine before the rebuild and did it smoke and what did it sound like? Does it sound a lot smoother/quieter now?

 

I assume you already have running-in oil in it but you have bought some more?  I think its much too early to be putting abrasive oil in, running in could take 100 hours.

 

Burning oil exhaust does have a distinctive smell but its hard to describe....go and find a boat with a worn out BMC to calibrate your nose. :)

 

..............Dave

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The boat smoked when we bought it , but as was cold and didn’t go for big run we didn’t notice too much , , it has normal oil in atm , , , the reason for think8ng use glazebore. As in previous thread. , when we retook top of engine off we could only hone prt way down with honer as pistons were not removed ,  and it’s not abrasive oil its just not as smooth an oil , according to their tech , , no abrasives or anything like that ,even my engine rebuilder just put normal oil in , and he specialises in marine and light industrial , and surprisingly Morris oils tech guy said this happens a lot , especial”y on old cars , rebuild , no running in oil and they begin smoking , ,, so have to use glazebust then running in oil again, 

back to my engine , ,the rm278. Is a marinised. Rd270 engine , the 270 is 28bhp.   The 278 downgraded for marine use , , ,  , i cannot find any info on how to check timing , ,nor can my engine man , , ,  so any ideas appreciated , ,

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We had engine rebuilt , it smoked from  day 1 but engine man Said it will bed in and get better ,,,new liners etc pistons and rings  lasted about 6 weeks. , and excessive smoke , so my engine guy came over after my complaint , we took head off , he said bores looked glazed , although I said we were not taking it easy or leaving ticking over , ,  we then had the valve seats redone  just in case , , as he said bores looked shiney , he used a gadget on drill , ie honer and wd40 for short while to scuff bores again , but as we only had top off. Not bottom, pistons still in situ , so we could only hone part way down ,  at this time we had injectors and pump checked , all ok , , , then i was told. Really give it some stick , , , 

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14 hours ago, Ant cole said:

The boat smoked when we bought it , but as was cold and didn’t go for big run we didn’t notice too much , , it has normal oil in atm , , , the reason for think8ng use glazebore. As in previous thread. , when we retook top of engine off we could only hone prt way down with honer as pistons were not removed ,  and it’s not abrasive oil its just not as smooth an oil , according to their tech , , no abrasives or anything like that ,even my engine rebuilder just put normal oil in , and he specialises in marine and light industrial , and surprisingly Morris oils tech guy said this happens a lot , especial”y on old cars , rebuild , no running in oil and they begin smoking , ,, so have to use glazebust then running in oil again, 

back to my engine , ,the rm278. Is a marinised. Rd270 engine , the 270 is 28bhp.   The 278 downgraded for marine use , , ,  , i cannot find any info on how to check timing , ,nor can my engine man , , ,  so any ideas appreciated , ,

Is this an API CC or just modern high-additive multigrade stuff?. Running in an engine on normal oil was a potentially very bad decision. Get it out now and try to work it hard on running in oil or at least an API CC. Its all a bit of a black art but its possible that the damage is already done.

Must confess I do not fully understand it all but the object is to take off the worst of the bore roughness but to leave a small amount of texture (the honing). Additives in modern oil can fill in this honing and leave too smooth a surface that the rings just skid over. 

 

...............Dave

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20 hours ago, Ant cole said:

We had engine rebuilt , it smoked from  day 1 but engine man Said it will bed in and get better ,,,new liners etc pistons and rings  lasted about 6 weeks. , and excessive smoke , so my engine guy came over after my complaint , we took head off , he said bores looked glazed , although I said we were not taking it easy or leaving ticking over , ,  we then had the valve seats redone  just in case , , as he said bores looked shiney , he used a gadget on drill , ie honer and wd40 for short while to scuff bores again , but as we only had top off. Not bottom, pistons still in situ , so we could only hone part way down ,  at this time we had injectors and pump checked , all ok , , , then i was told. Really give it some stick , , , 

I have never heard of a bore being only part honed in situ. Sounds very sharp and unsatisfactory practice to me.

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 I am no engine expert , but my engine man has 30 years of experience and on ruggerini .lombardini and kholer,

The part hone was all we could do without total engine removal again , 

The bores seemed quite glazed , but again I’m no expert , 

We honed down to top of pistons , better than nothing , 

Im not hopefull and pretty resigned that we will end up selling it , next few weeks will tell , we have spent a lot of time and money and come to end of it , , 

503C318F-482B-45DF-83A0-FE7407BD1E5E.jpeg

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1 hour ago, Boater Sam said:

I have never heard of a bore being only part honed in situ. Sounds very sharp and unsatisfactory practice to me.

Its quite a well known quick fix for sick engines, the tool looks a bit like a bog brush which may have some significance. :)

 

................Dave

Thinking about it a bit more, quite often the bores have wear or polishing towards the top but still show good honing at the bottom so it does sort of make some sense.

 

You can also replace shells without taking the crankshaft out!!!!

 

...and even put crushed bananas into the gearbox :)

 

............Dave

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15 hours ago, dmr said:

Its quite a well known quick fix for sick engines, the tool looks a bit like a bog brush which may have some significance. :)

 

We had one that consisted of three rectangular "rubber" wings fitted to a long shaft. Suitable emery paper was affixed to the wings to score the bore.

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16 hours ago, dmr said:

You can also replace shells without taking the crankshaft out!!!!

I used to do that on an early Range Rover with the 3.5 lump. It did regular trips to the south of France and the owner liked to replace all the shells at least once a year. Easy to swap them all in a couple of hours from start to finish. 

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1 hour ago, Tony Brooks said:

We had one that consisted of three rectangular "rubber" wings fitted to a long shaft. Suitable emery paper was affixed to the wings to score the bore.

I have used something similar many years ago but I think it had proper grinding stones rather than rubber/emery. I remember you had to do a very quick and gentle up and down else you got a poor mans rebore rather just the honing.

 

...............Dave 

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