Originally Posted by defjef
Shiva has a Volvo
MD17D - original installed new in 1986. The engine has over 4000 hrs. It has one major rebuild
of the head
, new injectors and so forth... did not have rings done.
In cold weather
... the engine will start right up and put out dark grayish blue smoke. As the engone temp comes up to normal operating temp... 10 minutes or maybe 15... the smoke clears. When the engine is warn there is only a touch of smoke.
I believe the engine needs rings, but the oil
tests fine... will do another test in a few weeks. Power seems fine, but fouled bottom and prop slows the boat a knot
The smoke freaked me out when it first appeared... I think it's from the rings and when it heats up they seal better... Just a guess as I am not a mechanic. It's not worth it to me to undergo the expense.
When the engine gets old it may be time to repower
. For now... she's fine.
Just a grouchy old guys 2 cents worth. My diesel was completely broken down for inspection
prior to installation
, 5000hrs. The mechanic indicated that the motor was just fine. My motor is doing the same as above, but considering she has sat for about two years, and did alot of idling for the test phase of the installation
I am not too troubled by a little white smoke on start up. Diesels like to be run under load. I have been making a real effort in taking the motor out and running it hard, 80% max rpm
for long periods. As a result I have noticed significant reduction in smoking and much easier starting. The classic auxilary diesel use in sailboats of long periods of dormancy and short periods of running can be a diesels wort enemy. So depending on how this motor was utilized the smoking may or may not be an issue. However considering the age consider the return on investment of tearing down, sweating the small stuff prematurely, after all it is a used boat
and motor. So if you really like this vessel and after review of comparable vessels for sale
it is within the range you might consider purchasing
. FYI I wish my motor ran at 180, my gauge reads 209 under load. However something that I didn't see mentioned is that gauges go bad and can give bad reading all the time, especially if old as well as the senders. Had a brand new oil pressure gauge out of the box read zero just last week.