X TYPE 3.0 Sports Engine Seized

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fogarty - 17 Mar 2006 19:27 GMT

Hi, My car is just four years old and has done 80,000 miles. The car has
always been serviced by a Jaguar dealer and the next service is due in
1000 miles. Whilst driving the car last week, the oil indiactor flashed on
the screen. I pulled over and switched the engine off and back on. The
light was no longer present. At the next services (2.5 miles)i pulled over
and checked the oil, i checked the oil level, this showed the oil to be low
but not excessivley low, 1 put 1 litre of new oil. When i opened the oil
cap the oil in the system look normal. Approximatlet 4.5 miles futher the
engine started juddering and came to a stop. When the car was taken to the
garage the engine had seized. On investigation the garage advised that the
coolant had been dumped (temperature guage showed normal). The insureres
are now questioning if the car had been run with no oil? or if the coolant
had been purged through a split hose.

HAVE ANY OTHER PEOPLE HAD SIMILAR PROBLEMS??

THANKS

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Hazey - 17 Mar 2006 20:32 GMT

Wow. Just wow.

>From what you describe, and since the temp light never went up and from

the sound of the death throws, it sounds like lubrication not coolant.

The only thing that I can think of is a catastrophic failure of your
oil sytem. The crank shaft engine is not passively lubricated by
dipping into the crank case oil. The crank case bearings are positively
lubricated by pressure from the oil pump moving through channels in the
block to the bearings. Failure of that positive pressure from an oil
pump failure will lead to oil startvation of the bearings. The light
coming on would also be due to a lack of pressure in the system from
the pump.

There are a couple of things that could have done this. The oil pump
could have failed. It is also possible that, if there are plugs in the
crank oil galleries (which I don't know since I have never had to dig
into one of these engines this far), that one or more of those plugs
backed itself out of the crank spilling oil from the system and oil
starving the bearings.

I would have a mechanic check the crank bearings, which will almost
certainly be destroyed, and check the pump and the crank assembly
plugs, or any possible O rings in that system, to see if they are all
in place. Other than that, I really can't think what else it could be.

Wow, I am so sorry for you. That is just a terrible thing to have
happen. Best of luck with it.

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old man - 17 Mar 2006 22:17 GMT

Old Jag 4.2 xj engines had a habit of when the head gasket blew, the temp
gauge would momentarily go up then revert to normal. It was v.easy to miss
this warning, the next warning would be that the oil pressure would
disappear due to overheating.

> Hi, My car is just four years old and has done 80,000 miles. The car has
> always been serviced by a Jaguar dealer and the next service is due in
[quoted text clipped - 13 lines]
>
> THANKS

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