Vehicle & Technical > Defender

Defender 300tdi - why has it died?!

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Saffy:

--- Quote from: horsepower on February 27, 2008, 13:24:24 ---My engine died whilst out on the road.


* Compression seems fine (tested with thumb over plug holes)
[/list]

--- End quote ---

Means nothing, mine old gave good compression against a finger even though two pistons and bores where trashed after a overheat. When finally obtaining a diesel compression tester it showed them to be less than a 1/3 of what it should be. I actually had the head off and the piston tops looked okay with a slight pick up evident on no.4 bore but I didn't know any better so had the head skimmed and new head gasket. Engine never actually ran again. Was only till I pulled the pistons out that I could see they was fubar.

You may want to get someone to turn it over while you look at the coolant in the header tank to check for any bubbles/lots of movement just to help towards ruling out a headgasket blown.

J13 MUD:
Hi

I had exactly the same problem with my sons Defender a few weeks back. Plenty of compression, rockers moving when the engine turned etc, etc. The RAC guy assured my son that the problem was not serious as it ran fine when he squirted easy start into the turbo hose, but it would not keep running. The first thing I did was remove the timing cover to find that about ten teeth had stripped from the timing belt!!! Fortunately there was no damage caused and a new belt was all that was required. I think its worth the effort to remove the timing case and have a look.

Good luck.

Jim

horsepower:
It was the alternator ... !

The front bearing on the alternator was shredded (lack of lubricant?), and the unit had seized - acting as a brake on the engine via the auxilliary belt.

I though I heard a screech when it died - and that's what was screaming.

At the time I was changing down while approaching a roundabout, and it must have happened while my foot was off the accelerator, allowing the belt to stop the engine, and prevent it from re-starting.

We used a squirt of Easy Start to get the engine to fire up, and then filled the garage with smoke from the belt and the pleasant song of shattered bearings.

Anyone ever seen that before?

Saffy:

--- Quote from: horsepower on March 04, 2008, 13:08:36 ---
Anyone ever seen that before?

--- End quote ---

My powersteering pump pulley seized solid just over a week ago and the serpentine belt cooked and snapped pretty much within a few moments, doing about 40-50mph.

I know alternators (esp ones that get water dunked and grit blasted ) can develop faults which cause them to overheat underload sand this melts and disperses the bearing grease which ends up trashing the bearings.

Range Rover Blues:
I've had the serpentine idler belt bearing collapse, but a big V8 doesn't worry about such triffles.  I've also had a rear diff nose bearing collapse, now that was interesting.

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