"tanks" TANK

[Busman]

Subjecting the injector to the same heat stresses it would see in operation is impossible. Each ignition stroke the tip of the injector is in the main combustion flame front yet the body of the injector is in a water jacket sleeve designed to carry the heat away from the injector, the top of the injector is in air and has cool fuel flowing through it, how could anyone possibly duplicate that on a test bed. then consider that at 2,000rpm that injector is exposed to this 2,000 times a minute yet cooled by the fuel flowing through and intake air during the other parts of the cycle, how could anyone duplicate that on a test bed. The golden rule appears to be that electronic injectors are a one use item, not for reconditioning, unlike the older mechanical injectors that could be rebuilt time after time.

T1 Terry

Think you might have meant 1,000 times a minute T1 (not being narky, just didn't know of any other 2 stroke diesels out there ? )

[T1 Terry]

Subjecting the injector to the same heat stresses it would see in operation is impossible. Each ignition stroke the tip of the injector is in the main combustion flame front yet the body of the injector is in a water jacket sleeve designed to carry the heat away from the injector, the top of the injector is in air and has cool fuel flowing through it, how could anyone possibly duplicate that on a test bed. then consider that at 2,000rpm that injector is exposed to this 2,000 times a minute yet cooled by the fuel flowing through and intake air during the other parts of the cycle, how could anyone duplicate that on a test bed. The golden rule appears to be that electronic injectors are a one use item, not for reconditioning, unlike the older mechanical injectors that could be rebuilt time after time.

T1 Terry

Think you might have meant 1,000 times a minute T1 (not being narky, just didn't know of any other 2 stroke diesels out there ? )

Very good, slipping in my senior yrs 1,000 times @ 2,000rpm for a 4 stroke, the other cycle the injector tip is being cooled by the intake air.
Nissan/UD made a screaming 2 stroke diesel, amazing engine that didn't fly apart like the GM tends to do when it gets a bit long in the tooth. Had one in a Hino bus that we used to replaced the Hino 210 pony hand grenade engine, last I saw of it there were well over a million kms on that 2nd hand Jap import engine and all we did was change the oil regular. Huge mileage for a passenger service bus as they get the very worst treatment possible for a diesel engine, the only ones that go close to that are the Isuzu 6 turbo engines, and they throw a leg out of bed just after they clock up the million generally, probably a safety feature so you don't try to rebuild it

[bob r]

The old commer knocker was 2 stroke diesel and supercharged.

Bob

[Keith Morris]

"tanks" here---
I had a trip to Perth to meet with an injector specialist and get some action going on the motorhome. The head has been removed and now [today] Skippers Trucks are going to remove all pistons and bits and pieces while the expert is there\.
On looking at the piston [no.2 cyl] from the 1st meltdown and also trhe piston [no 1 cyl] from the second meltdown it is almost certain that the injectors have caused an overfuel situation which caused the damage, and not a pre-existing condition as claimed by United Fuel Injection. This was shown when the engine blew up after only a few km from being a complete rebuild.
It is now just a matter of who pays for the damages so as Skippers can get to have another rebuild.
As there are no new engines available in Australia and they do not have any factory crate motors, I have to be satisfied with a rebuild motor [my original engine rebuilt a second time with ALL new parts. United have offered a set of new injectors, BUT Skippers want United to foot the bill for the 1st rebuild and the 2nd rebuild plus any other financial loss I have had to meet--towing fees and loss of use of the recreation lifestyle. GO FOR IT SKIPPERS TRUCKS.
I am told that this 2nd rebuild is not a problem as there is just a matter of removing and replacing the cylinder liners and fitting a new lot of bearings/seals/rings/pistons etc.
Keith.

[pet-els]

Best of luck Keith.

[Shirley]

Hoping you get mobile again real soon Tanks & hope you get all expenses reimbursed.

[Keevo52]

What a saga, we feel for you Keith, you must of run over a battalion of china men to have had this much bad luck with your motorhomes over the past two years, keep the bas*ards honest old mate.

Chris & Glennis

[supersparky]

What a saga, we feel for you Keith, you must of run over a battalion of china men to have had this much bad luck with your motorhomes over the past two years, keep the bas*ards honest old mate.

Chris & Glennis

Nup, wrong war.
Tanks, we all feel for you mate and hope that you can eventually get a satisfactory outcome.
Good luck.

[dapope]

Well, you are off the hook now Keith, its really between Skippers and United. Hopefully sense will shortly prevail.
Fingers crossed for you.☺

[jon_d]

Keith,

I've said this on a few other places.

Please make sure they certify that the electronics is ok. The the electronic sensors are faulty, it could be causing the computer to squirt more fuel. aka over fuel.

If they don't check the electronics, and a sensor is faulty, or the computer is faulty, they'll be doing another rebuild again.


Also, ask them to put it on a dyno and confirm the air/fuel ratio is ok.


Question for the repairers, what readings are stored in the computer? If it was over fueling so much to cause an engine faulire, the codes in the computer must have been going beserk.