300Tdi knock vibrate black smoke

**pk.hoarder** · 27th November 2012, 09:04 PM

Hi LR Gurus,
My D1 300Tdi with a recently installed (6+ months) cyl head (previous owner) had been running well until last Friday going up a gentle incline in 4th at around 60kms, bang noise, mega-vibration, total power loss and heaps of black smoke.

I pulled over and shut it down - no obvious external damage, no oil or coolant on ground, exhaust not hanging off or anything.

I started it, it would run but very very roughly. I was about 1km from a friend's place so I limped it there amid clouds of black smoke and an awful knocking noise (I always wanted to drive a head-turner for a car but this isn't how I imagined it). Seemed less rough near 2000rpm and symptoms didn't seem to get noticeably worse in the 5 min more that I drove it.

Any ideas? I fear big end or crank bearing after reading some forum articles. Would a broken rocker or rocker shaft cause huge vibration? It shakes so much at idle it looks like it could tear off the mounts! Gets a bit smoother but still dreadful around 1500-2000rpm.

Could a dead turbo cause that? It seems to me the turbo wouldn't make it vibrate so much?

Thanks for any advice you can give... one of the best things about Landies is this forum!

One other clue maybe - I haven't had this one very long but I have driven a few 300Tdi D1s and this one is much quicker than any of the others, even though economy was the same or perhaps slightly better than my old slow one. The previous owner assured me they hadn't tweaked anything. I put the improvement down to the new head.

Gearbox is manual and year is 1995. Wasn't reading hot at gauge and had plenty of oil and coolant (new water pump, heater core, expansion tank, tank cap and radiator filler plug was sealing OK).

Cheers
Paul.

**gazk** · 27th November 2012, 09:18 PM

Possibly a Failed Timing Belt tensioner and Slipped Belt ?

**jakeslouw** · 27th November 2012, 09:29 PM

Originally Posted by gazk

Possibly a Failed Timing Belt tensioner and Slipped Belt ?

That sounds plausible and since you'd need to start pulling off things to diagnose the problem anyway, the timing belt cover may as well be first.

**rangieman** · 27th November 2012, 11:26 PM

Originally Posted by gazk

Possibly a Failed Timing Belt tensioner and Slipped Belt ?

I have a feeling someone is on the money , Only recently suffered the same and yes the belt

**pk.hoarder** · 28th November 2012, 07:00 AM

Thanks, will start at the front and post what I find...

**camel_landy** · 29th November 2012, 07:42 AM

Yep, check the belt, timing, etc...

It'll also be worth pulling the rocker cover off and just checking the top end for anything obvious.

M

**pk.hoarder** · 4th December 2012, 05:57 PM

Guys, have not forgotten but car isn't at my place so I have to visit it to work on it... and learning about taking hub fan off with a special tool or a ground-down 32mm open-ender...arrrggh. So, still not even looked behind timing cover!

**Blknight.aus** · 4th December 2012, 06:55 PM

before you do that...

unbolt the AC tensioner and eyeball the pump timing holes, the TDC marker on the crank and the valve positions.

If they all make sense remove the glow plugs or injectors then check out whats happening in the pots

**pk.hoarder** · 17th December 2012, 07:49 PM

At last - stubborn inspection plug removed (hammer, vise grips, blowtorch, drill and 2 ezi-outs later - should have just gone straight to the big ezi-out and heat), rotated motor tonight and found the TDC mark on the flywheel.

It seems like there is more than 1 spot in the revolution of the fuel injection pump where a 3/8" drill shank will slide into the U-shaped slot easily to a depth near 50mm. But one of those spots (near 4 o'clock position looking from the front) has the flywheel mark NOT dead in the middle of the inspection hole - if I look at a bit of an angle, I can just see it but it's definitely not in the middle. The other spots (near 10 o'clock on the injector pump if I recall rightly) there is no flywheel mark near the inspection hole.

Peeking through the oil filler cap we confirmed that the front 2 valves were shut at that position (and those 2 vales move which I hope means the rocker gear isn't too mangled).

Motor isn't too hard to turn and we haven't taken any injectors out - I expected the compression would stop us turning it and removing injectors would be necessary. Probably something broken inside...

So - next step is to take off the timing cover. Should be straightforward, only took me a week to get the flywheel inspection plug out...

redrovertdi · 17th December 2012, 07:57 PM

I had a similar problem happen, it turned out to be a broken rocker shaft

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