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Detroit 671 TI Blue smoke on start up

  • Thread starter pete ameljanczyk
  • Start date
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pete ameljanczyk

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" I'm getting blue smoke o

" I'm getting blue smoke on start up and on low idle,
under power and crusing 1900 to 2000 rpm it seems fine, the engins do have 2100 hrs on them, is it time to overhaul or should I check valve or turbo
seals or anything else that would cause the oil to
build up. "
 
Could be any or all of above

Could be any or all of above mentioned problems! Emilate by starting with compression test.
 
" A compression test is a good

" A compression test is a good idea, we used to hook a gauge to the blow-by tube for a quick field test, not perfect, but easier to do in the field. I don't know the specs on what the pressure should be, but I know the original info came from a Detroit book (long, long ago in a galaxy far far away). Make sure the slobber boxes aren't plugged. "
 
its a detroit 671 i thought th

its a detroit 671 i thought they were like that from new
 
"Pete I had the same problem o

"Pete I had the same problem on one of my engines in my 40' ocean. After review from my diesel mechanic the verdict was a bad piston ring on the 5th cylinder, all that you can do is rip it apart. ;)

Best of luck,
G.S."
 
"Blue smoke indicates Piston b

"Blue smoke indicates Piston blow-by, worn valve stems or both. You're burning oil.

Olymbitis"
 
Boat mechanic says my airboxes

Boat mechanic says my airboxes on my 1987 671 ti are loose. Friends think its nonsense. ANy opinions?
 
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