Outer Limits 4x4 Board

Can anyone help? This would be greatly appreciated.

Here is the scenario set forward by my mate.

He's had a '99 model 3.0ltr TD Jackaroo for a few years. A couple of months ago a radiator hose split and apparently coolant went all over the engine bay and the engine stopped. He repaired this and kept driving it. Not long after this, the truck would stop shortly after being started. This went on for a weekend until they called RACQ who could only diagnose the problem as coolant in the fuel system.
Upon hearing about a recall from Holden regarding faulty injector sleeves or something - he had new injectors installed by Holden who believed this should have rectified the situation. All was fine for a day or two until it all happened again. Holden have now passed the responsibilty onto my mate saying that he has a cracked head and it's out of his hands.

My question is:
Can a cracked head allow radiator coolant into the fuel system?

Any help you might be able to offer will be greatly appreciated.

Regards

Anthony.

Jackeroos have a fuel rail in the head, so technically if the head has cracked between the fuel rail and a coolant passage way, coolant may contaminate the fuel system.

Layto....

If his engine has stopped from overheating, he probably has cracked the head as well as other damage. Time for him to make some serious decisions.

Andy

Yep, sure can (speaking from personal exp') I'm sure you can test coolant for fuel contamination or check for bubbles in the radiator when car is running.

The pressure of the fuel gallery is higher than that of the coolant system. Some Jackaroo owners have experienced fuel in the radiator due to breakdown of O rings and even porosity of the head between the fuel and coolant galleries is not unknown.

how much coolant did he loose and did it spray onto his electrics my old boys roojacker has a hissy fit after every time ha washes it he has to dry out the wiring to the throttle body

One of my mates had problems with his Jack stopping. I can't remember which was the solution - as he had a couple of glitches at the same time. One was the coolant temperature sender unit - had been repaired and not connected again properly - and was shorting out. The other was another sensor or something, which he replaced - and still didn't solve the problem until he took a couple of thou off it. If the problem still hasn't been resolved, let me know and I'll ask him what it was. Both are fixed, and his Jack's running fine now.

take it beck to holden and ask them to do an injector solenoid cut off test and an injector balance test. the injector recalls have been known to be faulty. this should only take no longer than half an hr.
we have had 3 come back thru our workshop.
if the injectors are ok then go looking at the other problems.