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Thread: Land Rover First start up Issue
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26th Jan 2022, 08:41 PM #1Golden Member
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Land Rover First start up Issue
Video- https://youtu.be/BM8b3zw0bGY
So I bought a Defender 200tdi that has sat in a paddock under a tree for the past 5 years and today I returned to get it running.
After cleaning the air filter, priming the lines, fitting a new battery, it fired right up no problems.
But... there's a gas leak at the back of the motor, somewhere near the head gasket, there were no issues with the vehicle before it being parked up.
I really hope it's not a crack or a head gasket, I've done 2 already in the last 12 months and don't really want to do another one.
Surely a head gasket wouldn't fail just from sitting?
I was hoping maybe a welch plug had rotted and it's just leaking crank case pressure, but it seems more like the pressure from a single cylinder escaping, No 4 and that would still mean pulling the head anyway
I'm not familiar with these engines, or diesels for that matter.
What are your thoughts?
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26th Jan 2022, 09:39 PM #2
Can you do a compression test to confirm loss of Compression? You've got 4 other cylinders to compare with with. Will also help with diagnosing overall health of the engine, although the mighty 200tdi is pretty robust.
Another trick is to give it a good dose of degreaser in the area, then run it to see exactly where and what it is leaking. If you've done HG's before, you'll know that it'll be compressing either the cooling system, oil galleries (same as blow-by), or cylinder pressure to atmosphere, with the latter manifesting as a loss of fuel/air charge past the blown gasket to the outside of the engine.
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26th Jan 2022, 10:38 PM #3
Easy peasy.
Mix up some dish detergent and water in a spray bottle.
Spray it around the noise. You'll see the bubbles.
Check that the injector is seated properly.
Check the water in the radiator.... oily? Gristles floating on top? Going down?
Check the oil. Any water contamination?
My thought is this is simply a stuck inlet valve. It isn't closing properly and we are hearing a little blowback. I sincerely hope you changed the oil.....that 5 year old stuff would be syrup. Change the oil, get the engine hot at idle. See if it goes away. If not pop the cover off and have a wee gander at the rockers and make sure there is an itty bitty bit of lash in them...
Even if its a head gasket, this is a dead easy piece of work on these old donks... its almost enjoyable!
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26th Jan 2022, 10:44 PM #4Golden Member
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G’day Commander,
I’ll have to pick up a compression gauge so I can test the cylinders, it’s a tool I don’t have but probably should. When you need it, you need it!
I’ll take the pressure washer and degreaser with me next time, probably this weekend.
and a torch/mirror, it’s bloody hard to see back there.
I just can’t imagine how a gasket would have failed from sitting doing nothing, I trust the sellers word that it was a good runner before he stopped driving it.
I’m not too familiar with these engines or diagnosing their faults, but it looks like I will be soon!
all part of owning a Land Rover i guess
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26th Jan 2022, 10:53 PM #5
Looks like you need to do a lash check anyway... so its time to get a few tools
https://www.landroverexpedition.com/...ve-clearances/
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26th Jan 2022, 10:54 PM #6Most Valued Member
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I’d think with that amount of leakage you’d possibly even see a missing piece of gasket.
Seems to be running pretty smoothly though - I’d expect it to be rougher.
Exhaust manifold perhaps?
Steve
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26th Jan 2022, 11:42 PM #7Golden Member
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I really hoped it was the manifold but it feels like it's blowing straight out the back of the motor, somewhere between what felt like welch plug and the cylinder head, but it's hard to say because I was going by feel,
you can hear my hand obstructing the flow when I put my hand against the back of the motor.
Still starts and runs like a champ
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27th Jan 2022, 07:47 AM #8Most Valued Member
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The welch plugs on the motors are in the water passages and have nothing to do with crank case pressures. I've been told by several mechanics that their purpose were to help remove the casting sands used in their production of the heads and blocks.
I can't quite see how far your hand is in behind the motor, but it sound like, to me, that an exhaust manifold gasket has let go. It could be, that it was on it's way out when parked, and the rot continued as it was "parked" and that the start up was enough to blow that edge out.. To confirm this, apply some sealant to the area of blow out, and see if that stops the blowing effect.
I wanted to become a mechanic, when I was young and FOOLISH.
KrynTo grow old is mandatory, growing up is optional.
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30th Jan 2022, 07:22 PM #9Diamond Member
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I'm a bit late to the party but i don't think it would run that well with a blown head gasket, it should be missing very bad, if it was leaking that much compression, i doubt that cylinder would fire. One way to check is to crack the injector lines one at a time while it is running and listen to how much the engine noise changes, If the back cylinder makes little to no difference, blown head gasket.
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30th Jan 2022, 10:10 PM #10Golden Member
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I hope you're right! it does seem odd that it starts and runs so well.
to me, it feels and sounds like exhaust and it's coming from the back of the block/head
The plan was to get it running and drive it home where I can work on it under the carport out of the weather, the new plan is to hire a car trailer.
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30th Jan 2022, 11:01 PM #11Most Valued Member
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If hiring a trailer, be aware the Landy is over 2T by itself - so not legal on your average hire trailer. typically they’ll only take a 1200-1400kg load.
Steve
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9th Feb 2022, 02:05 PM #12Golden Member
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Finally got her home
IMG_2022.jpg
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9th Feb 2022, 05:30 PM #13Most Valued Member
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Nice. Looks pretty solid under the general storage dirt.
Steve
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11th Feb 2022, 07:51 PM #14
Keep an eye on it, they're contagious.
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11th Feb 2022, 08:10 PM #15Golden Member
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