V6 53 detriot fuel problem

[John Deary]

i have a pair of these loverly old things in my 1964 dutch gentlemans motor boat .
i have stript them down twice now and am still getting what looks like deisel comeing out with the water and smoke ????
one engine only .
i am at my whitts end can any one help ??

Thanks

[lazeyjack]

is there any fuel in the jacket water(fresh_

[george allard]

First thing, get and engine oil sample and get it checked.

[John Deary]

Originally Posted by lazeyjack

is there any fuel in the jacket water(fresh_

No contamination in fresh water at all

[lazeyjack]

ok I,m thinking, usually injecter sleeves leak which either have holes or bad seats, leak overr to jacket
I,m not a Detroit expert, but on any make I can noy think how fuel can pass to Raw water, you sure its not oil? Cos oil can, from leaking cooler or many ways
In fact casting my mind back I,m sure its lube oil

[lazeyjack]

wrong, he has oil in water not water in oil

[george allard]

You will have more oil pressure then water pressure when running.

[John Deary]

this does appear to be fuel as when i check dip stick oil level has not changed ?
some has suggested a faulty injector spilling to much fuel into cylinder then being ejected with exhaust stroke ?

Would that be likely ?

[lazeyjack]

does not matter, I have seen huge gears empty through leaking coolers I was FIELD SERVICEMAN fot Cummins Eng Co in early 1970,s before taking up boat and yachtbuilding, and I used to come across this sort of this quite often

[lazeyjack]

Originally Posted by John Deary

this does appear to be fuel as when i check dip stick oil level has not changed ?
some has suggested a faulty injector spilling to much fuel into cylinder then being ejected with exhaust stroke ?

Would that be likely ?

yes, cracked cup, yes yes yes, could well be, how silly of me not to think of this, given time would have, been away from engines awhile now

[george allard]

Does the engine miss when running? You can pull the valve covers and short out one injector at a time and find the bad one.

[hartley]

John, You are making smoke right? black or white? both mean unburned fuel
which will show up in exhaust,check rack adjustment,injector height,also the injectors themselves,have they been o/hauled ,injector height needs special tool ......good luck

[John Deary]

i have fitted brand new dd injectors and they are all timed up correctly using the correct tool ??

I have checked the rack taht many times - i hate it !!!!

what is a cracked cup - lazeyjack?

[SeaSpark]

Hoi John,

Some people on this forum have great knowlage about diesels and i would not want to offend anyone trying to anwser your questions here but perhaps you can post your problem at http://boatdiesel.com/index.cfm it's very active and they even have a dedicated Detroit 53 series section.

[John Deary]

have pressure tested cooler and no problems there ?
any more ideas lads ?
i will have a look at the injector cups as they may be damaged
thanks