petem
Well-Known Member
For barn find cars don't they squirt some oil down the bores?
How long do you think is too much for an engine to be NOT used?
- Thread starter MapisM
- Start date
For barn find cars don't they squirt some oil down the bores?
burgundyben
Well-Known Member
Only people with no grasp of the combustion process or the environment inside the cylinder.
petem
Well-Known Member
Who said anything about combustion?
burgundyben
Well-Known Member
We're talking about engines not run for a while and the process of firing them up.
vas
Well-Known Member
fwiw (not much...)
after finishing the rebuilt of MiToS I just cranked and started the engines. I should even admit that I still have the same oil (only done 30h or so...) and plan to change it next week when I'm back in the water (bring them up to temp and remove using the built in pump thingy)
er, that was 4 yrs standing doing bugger all and not even cranked once. IVECOs 8061SRM33 plus a yanmar 2cyl on the genny.
all normal disclaimers and touch wood stuff
cheers
V.
after finishing the rebuilt of MiToS I just cranked and started the engines. I should even admit that I still have the same oil (only done 30h or so...) and plan to change it next week when I'm back in the water (bring them up to temp and remove using the built in pump thingy)
er, that was 4 yrs standing doing bugger all and not even cranked once. IVECOs 8061SRM33 plus a yanmar 2cyl on the genny.
all normal disclaimers and touch wood stuff
cheers
V.
Latestarter1
Well-Known Member
No worse than pre-filling oil filter (mandatory) when performing lube service.
Far less danger than bearing spalling on dry start.
petem
Well-Known Member
I was responding to MapisM's post #49 about precautions that could be taken before turning the engine over by hand. I should have made that clearer.
chrishelen
N/A
We started a Gardner 4lw on an old wooden boat that had been abandoned for over 20 years, the engine was a bag of rust but we connected a 10ltr jerry can of fuel, the oil was OK and one of the lads spun it over on the crank handle and away she went....a bit rough to start but after a minute or two she settled down to a nice rhythm, not much smoke.
MapisM
Well-Known Member
Urgh, that sounds bad.
Do you think that could happen also upon a slow manual rotation, meant just to check that the engine spins freely?
Latestarter1
Well-Known Member
I have started plenty of engines following long periods of inactivity and there are two issues.
Piston rings stuck to the bore and spalling, i.e. two rotating surfaces which are either devoid or have very little oil film and one surface tears away parts of the other.
Barring engine over carefully and stopping if any resistance is felt is good test to check for ring sticking. likewise barring engine over will cause no bearing damage.
Portofino
Well-Known Member
Presumably the boats in a hanger?
Have the engines been decommissioned or the boat just blocked off and covered with a dust sheet ?
For thoses reading this hangering boats is quite comman in Italy and parts of SoF .
My boat new to me was hangerd for 3 1/2 years by the previous owner ( Divorse /remarry /toddler ) .
How ever it was alledgedly re -commissioned by a local MAN agent .I bought it in Oct after 30 hours since put back in June .
Not exactly sure what the procedure was ?
But it had ,new batteries ,fresh oil , impeller , filters , and something not mentioned here -coolant in the closed circuit .-it still looks v new that fluorresent green looking stuff - also on inspection what appeared like a new Gearbox sensor /oil pressure sensor / and a new "hot" side of a turbo .
I looked at some boats -Pershing ,Itamas (along with Harly Davidsons and Helicopters) in a hanger in Cogalin SOF -it's near St Tropez -I got the impression that the owners just for what ever reason stop using , One of the four Itamas had been in there 7 years !
I asked about what happens and the sales guy said it would cost approx € 5 K to re-commission .MAN 14 L V8's
In the E room I did not see any evidence of any thing special -ie the impellers had not been pulled or stainers opened etc ,the baterries where taken out -.
A thought occurred to me with a big diesel in a confined E/R -"turning over the engine " -presume with a bar on the crank pulley ? -that's easy to say buy v diff to do with out the correct tool
So I suspect it's a dealer job ,in which case a full re-commission ,new impeller and fluids etc -in which case pull the injectors to lub the rings ( depending on hrs -refurb them while out ?)
New Bats hence easy eating € 5 K I was quoted by a boat storage Co .
Needs to be a good deal with plenty of headroom in the price for a sizeable contingency fund and you need plenty of time to fix things as well or arrange it.
Have the engines been decommissioned or the boat just blocked off and covered with a dust sheet ?
For thoses reading this hangering boats is quite comman in Italy and parts of SoF .
My boat new to me was hangerd for 3 1/2 years by the previous owner ( Divorse /remarry /toddler ) .
How ever it was alledgedly re -commissioned by a local MAN agent .I bought it in Oct after 30 hours since put back in June .
Not exactly sure what the procedure was ?
But it had ,new batteries ,fresh oil , impeller , filters , and something not mentioned here -coolant in the closed circuit .-it still looks v new that fluorresent green looking stuff - also on inspection what appeared like a new Gearbox sensor /oil pressure sensor / and a new "hot" side of a turbo .
I looked at some boats -Pershing ,Itamas (along with Harly Davidsons and Helicopters) in a hanger in Cogalin SOF -it's near St Tropez -I got the impression that the owners just for what ever reason stop using , One of the four Itamas had been in there 7 years !
I asked about what happens and the sales guy said it would cost approx € 5 K to re-commission .MAN 14 L V8's
In the E room I did not see any evidence of any thing special -ie the impellers had not been pulled or stainers opened etc ,the baterries where taken out -.
A thought occurred to me with a big diesel in a confined E/R -"turning over the engine " -presume with a bar on the crank pulley ? -that's easy to say buy v diff to do with out the correct tool
So I suspect it's a dealer job ,in which case a full re-commission ,new impeller and fluids etc -in which case pull the injectors to lub the rings ( depending on hrs -refurb them while out ?)
New Bats hence easy eating € 5 K I was quoted by a boat storage Co .
Needs to be a good deal with plenty of headroom in the price for a sizeable contingency fund and you need plenty of time to fix things as well or arrange it.
Last edited:
MapisM
Well-Known Member
Good to hear that.
It's actually a certified MTU engineer who suggested it, just to be sure at least that the thing spins freely, so he should know his onions. But you never know...
He didn't mention pumping oil, and he said that barring both engines for 720° shouldn't take him more than one hour or so, therefore I assumed he's going to do that without any advance lubrication, so to speak.
As next steps, before actually cranking and eventually firing the engines up, he suggested to remove all injectors (taking the opportunity to refurbish them, which is part of the scheduled maintenance every thousand hours anyway) and borescope check the cylinders.
Which of course will take much longer overall, but the cost he quoted ain't as bad as I feared, considering also that the access to the external cylinder banks is a bit of a pita...
...btw, why do most designers of P boats think it's ok to stick the biggest possible engines in the smallest possible e/r space???
Aaaarumph! :ambivalence:
MapisM
Well-Known Member
Yep to all that - see also my previous post.
Re. the tool, there is one specifically made for this job: "viratore" is the IT name, which I believe translates as "barring device", but over to you guys on that.
vas
Well-Known Member
ask why they bother sticking the tanks on the sides minimizing further the access...
waiting to hear what this new find is (in due course of course...)
cheers
V.