1984 120G grader

[Dave Neubert]

Does it have bad blow by

 

[56wrench]

if this is a sleeve metering injection pump, is there any sign of fuel leaking from the seal weep tube up near the drive end of the injection pump? Or is it plugged? It should be open and dry

 

[Toxin]

Does it have bad blow by

Not bad for engine with15k hours

 

[Toxin]

if this is a sleeve metering injection pump, is there any sign of fuel leaking from the seal weep tube up near the drive end of the injection pump? Or is it plugged? It should be open and dry

No but it seems to be leaking very small amount around the governor control linkage

 

[Toxin]

If someone pumps the hand priming pump while cranking and the engine starts then it could mean that the fuel transfer pump is not supplying sufficient fuel to the injection pump.

How about the full story.? How did this non-starting problem first start (suddenly or got worse over time) and what has been done to the engine so fa

 

[Toxin]

I pumped the hand pump but didnt starts

I dont know how it started or when i took over job that has been through quite a few operators.the turbo was bad i replaced it.i just replaced the injectors i doubt its been replac

 

[Toxin]

Ok the injectors helped gave it little more power,but still wont start without either.it has 15k hours on it im starting to think the rings are about gone and it not got enough compression to fire the injector.
Does anybody habe any other idea.on possible reasons why wont start without either?

 

[d9gdon]

Check injector pump timing to engine.

Also check the valve lash at TDC.

 

[Dave Neubert]

Your injection pump could be wore out that will cause hard starting

 

[Toxin]

Your injection pump could be wore out that will cause hard starting

Is hard starting what its called? It literally will not start without either.if i break line loose to injector and crank engine fuel comes out.

 

[OzDozer]

At 15K hours, I'd have to opine the engine is well worn in the rings and cylinders dept, and compression may be well down, on what it was when new.
Does it produce a lot of grey smoke when you're cranking, without ether?

 

[Dave Neubert]

but does fuel come out when under pressure does it smoke wile cranking it without either. had a customer with the same symptoms in a 615 with a 3306 rebuilt the pump and that solved his problem. just because fuel comes out with line loose don't mean fuel will come out under pressure

 

[Toxin]

No it doesnt

 

[Toxin]

but does fuel come out when under pressure does it smoke wile cranking it without either. had a customer with the same symptoms in a 615 with a 3306 rebuilt the pump and that solved his problem. just because fuel comes out with line loose don't mean fuel will come out under pressure

Thats what i was leaning towards is not enough compression to fire injectors

 

[Toxin]

Your injection pump could be wore out that will cause hard starting

Thanks ill have to see get a rebuilt one maybe

 

[joe--h]

Turbo = not fixed

New injectors = not fixed

Now you're gonna throw an injection pump at it and see if it's fixed?

STOP

Check the compression.

How much have you spent so far?

Joe H

 

[OzDozer]

Joe H is right on the mark - the simple stuff first, don't just start throwing new components on it, willy-nilly.
Do a simple crankcase blowby test using a manometer, or a little more involved cylinder leakdown test.
You have to determine whether those cylinders, pistons and rings are still providing adequate sealing performance.

 

[Toxin]

Joe H is right on the mark - the simple stuff first, don't just start throwing new components on it, willy-nilly.
Do a simple crankcase blowby test using a manometer, or a little more involved cylinder leakdown test.
You have to determine whether those cylinders, pistons and rings are still providing adequate sealing performance.

It will push the oil fill cap out if not in all the way.the fins on turbo were gone it was useless needed replaced anyway and injector were most likely original.how many motors anybody seen with 15k hours that has had multiple operators and dont know if was properly maintained.i was hoping of avoiding engine rebuild but i dont think thats happening lol.thanks for everyones input its greatly appreciated.

 

[Dave Neubert]

If it pushes the cap off the motor is wore out

 

[56wrench]

The worst worn-out diesel engines i ever saw wouldn’t even fire on ether