Detroit Diesel 671 injection
Detroit Diesel 671 injection
(OP)
I need specifications/manuals about how to tune injection in DDs JT671T1.
A client is having problems: fitted new rings and serviced injectors and now engines smoke white and don't give full power.
I was asked to diagnose and (eventually)fix the problem. Thanks in advance for your help.
A client is having problems: fitted new rings and serviced injectors and now engines smoke white and don't give full power.
I was asked to diagnose and (eventually)fix the problem. Thanks in advance for your help.





RE: Detroit Diesel 671 injection
http://www.johnsontowers.com/
Call and ask for the oldest guy in the place...
Mike Halloran
Pembroke Pines, FL, USA
RE: Detroit Diesel 671 injection
White smoke generally indicates unburned fuel and your loss of power suggests something very wrong with the injector timing as well as a good possibility on the fuel flow. If you can find out the plunger lash you could check that, but setting the rack is another whole thing.
The first thing I would check is to see that the injectors were set correctly for the engine that they are operating in. Did the shop that did them know the engine specs?
rmw
RE: Detroit Diesel 671 injection
Thanks rmw for your advise.I will be traveling soon to see the engines. For what you say, tuning a Detroit is out of the limits of my competence. I know Cummins B and C series and they are lovely and friendly engines, simple and effective. I'd be happy with myself if I could 1.Check the injectors specs to find if they are the right ones; 2. Check/Adjust the distance between cam and injectors (Is this the plunger lash?). This adjustment value is something I must also find.
Thanks again to all and to this excellent forum.
All the best
Helder Ferreira
Ayamonte, Spain
RE: Detroit Diesel 671 injection
rmw
RE: Detroit Diesel 671 injection
Ed Danzer
www.danzcoinc.com
www.dehyds.com
RE: Detroit Diesel 671 injection
With the thing rated to consume one gallon of oil for every 10 hours of operation when it was running normally, who would know where it all came from (if you discount what just leaked out of every potential leak point on the engine).
Question is; was any work done on the enging the last round that would have upset the rings and let oil bypass them into the air boxes until they reseat?
Second question is; is the smoke continuous or does it abate after some time running.
rmw
RE: Detroit Diesel 671 injection
I believe that with 2 new turbos things will get close to perfection. The only doubt then will be the governor's adjustment. There were so many fiddlers playing that fiddle that everything is to be expected.
Thanks to this excellent forum
RE: Detroit Diesel 671 injection
rmw