[AT] Isuzu smoke problems

[Cecil Bearden]

could these  be similar to the old detroits that had to run about an hour to 
get the oil burned out of the airbox??  the seals on the supercharger would 
leak and let oil into the airbox..  They would slobber oil all over when not 
pulling.  I still love the sound of a Detroit, and like them in a truck.  My 
238 6V-71 will still out pull that brand new electronic 3126E Cat with 330 
PONIES

Cecil in OKla
----- Original Message ----- 
From: "Phil Auten" <pga2 at hot1.net>
To: "Antique tractor email discussion group" <at at lists.antique-tractor.com>
Sent: Sunday, November 06, 2005 3:31 PM
Subject: Re: [AT] Isuzu smoke problems


> Possibly a seal between the two halves of the turbo, allowing fuel to leak
> into the exhaust side?
>
> Phil
>
> At 06:45 PM 11/5/05, you wrote:
>>I bought a 1986 Isuzu cab forward truck with a 14 flatbed dump ( to haul
>>tractors ). This is a 3.9L 4 cyl Turbo Diesel 5 speed manual. The PO had
>>replaced the turbo with a later unit which is water cooled the original 
>>did
>>not have water cooling. From what I understand it was a fairly common
>>upgrade. The problem I have is smoke light blue to white on startup really
>>bad, after warm-up the following conditions under load smoke is not a
>>problem under coasting with no load just using the throttle to maintain
>>speed I am blowing light blue smoke.  If I am completely off the throttle 
>>no
>>smoke, as I transition back to power short cloud of light blue then clean.
>>I just had the injectors rebuilt the injectors pressure was low and the
>>spray patters were bad to poor.   I changed the oil and filters.
>>I have not had it very long but I did not notice any drop in the oil 
>>level.
>>It smells like diesel not engine oil burning. I believe this has 162K 
>>miles
>>and it is probably a California vehicle with the timing set 6 degrees 
>>BTDC.
>>According to the book Federal timing is 14 degrees BTDC.
>>I am surprised at not being able to find very much information on this
>>engine on the Net.
>>One thing I am wondering about is the original turbo had a wastegate on 
>>the
>>turbo unit to dump excess pressure into the exhaust.  There is no 
>>wastegate
>>in this system now. I do not know how much boost it is running. In looking
>>at pictures of other later engines  they look the same as mine plumbing 
>>wise
>>with no visible wastegate.
>>
>>Anyone experience this before or know about these engines.
>>
>>Bruce Fallon
>
>
> _______________________________________________
> AT mailing list
> Remembering Our Friend Cecil Monson 11-4-2005
> http://www.antique-tractor.com/mailman/listinfo/at