Blown Motor 04 4.6L Disco.. Options??
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Rock Crawling
Joined: Jan 2009
Posts: 414
Likes: 2
From: Charlotte NC
Blown Motor 04 4.6L Disco.. Options??
So my brother and I have been posting the tragic events of overheating, which was a direct result of the blown head gasket. Thanks for the help with that one guys. We replaced the gaskets, and did everything as told, then we had it compression tested and all checked out. A week later, water starts disappearing again, overheating starts and the same crap all over again.
We did the angled cooling system flush and it worked great for 3 days, but then back to the same problems. "My brother kept driving the damn thing even though I told him to park it" so now its making metal high pitched scraping sounds. I assume that pistons against the walls. Also there is water in the Oil that he can see from looking in the top hole of the engine.
The cooling system is so pressurized, that it was spiting water out of everywhere!! ex. the thermostat hose clamps, the lower radiator hose clamp, and the heater core hose clamps.. all these hoses where spitting water with clamps tight.
So I contacted the Land Rover specialist in town and he said he had the same issues with his '03 disco 4.6L, and that it is a pin hole in the piston chamber that is pumping air into the cooling system. Have you guys heard of this, he described my problem to a T so I assume he knows whats going on.. "he gets great reviews and has a parking lot full of Rovers"
My question to you guys is, where do I go from here?? can the engine be rebuilt or is it most likely junk? Will a used motor swap put me in the same position in a year or two?? Buying a short block and using my parts on it as a rebuild??
any advise from here is very helpful.. Thanks
Rover guy recommends putting Range Rover engine in it which is better built, but my 04 S Model Disco is only worth $6K, is it worth the effort?
p.s. I owned an old CJ-7 304 and swapped out the motor 3 times myself. Is this motor swap a tough one?
We did the angled cooling system flush and it worked great for 3 days, but then back to the same problems. "My brother kept driving the damn thing even though I told him to park it" so now its making metal high pitched scraping sounds. I assume that pistons against the walls. Also there is water in the Oil that he can see from looking in the top hole of the engine.
The cooling system is so pressurized, that it was spiting water out of everywhere!! ex. the thermostat hose clamps, the lower radiator hose clamp, and the heater core hose clamps.. all these hoses where spitting water with clamps tight.
So I contacted the Land Rover specialist in town and he said he had the same issues with his '03 disco 4.6L, and that it is a pin hole in the piston chamber that is pumping air into the cooling system. Have you guys heard of this, he described my problem to a T so I assume he knows whats going on.. "he gets great reviews and has a parking lot full of Rovers"
My question to you guys is, where do I go from here?? can the engine be rebuilt or is it most likely junk? Will a used motor swap put me in the same position in a year or two?? Buying a short block and using my parts on it as a rebuild??
any advise from here is very helpful.. Thanks
Rover guy recommends putting Range Rover engine in it which is better built, but my 04 S Model Disco is only worth $6K, is it worth the effort?
p.s. I owned an old CJ-7 304 and swapped out the motor 3 times myself. Is this motor swap a tough one?
Camel Trophy
Joined: Feb 2007
Posts: 4,959
Likes: 11
From: Tulsa, OK
Not too bad to swap. I think you can put a Rangie 4.6 in. If you are getting a used engine, just be aware that the locating pins on some 03 engines werent right and there is a VIN range. Make sure you don't get an engine in that range.
Never heard of what your mechanic is describing. Usually the motor overheats and the liner drops. This allows cumbustion gasses into the cooling system and all of the fuids to mix. Block is toast when this happens. What it will cost to re-sleeve is more than a new short block.
It is worth the effort if you have the resources. If you like the truck and want to keep it, do it. If you are looking to make money out of it, I would sell it like it is. Then again, if you wanted to make $$, you wouldn't have gotten a Rover..(ha ha)
Take the manifold and intake off, and you are just swapping a motor out of a Buick.
Never heard of what your mechanic is describing. Usually the motor overheats and the liner drops. This allows cumbustion gasses into the cooling system and all of the fuids to mix. Block is toast when this happens. What it will cost to re-sleeve is more than a new short block.
It is worth the effort if you have the resources. If you like the truck and want to keep it, do it. If you are looking to make money out of it, I would sell it like it is. Then again, if you wanted to make $$, you wouldn't have gotten a Rover..(ha ha)
Take the manifold and intake off, and you are just swapping a motor out of a Buick.
TReK
Joined: Oct 2008
Posts: 3,106
Likes: 8
You probably dropped a sleeve or have a cracked block and the engine is done. If you can find a low mileage engine locally and replace all the gaskets go for it. Otherwise autosports unlimited and roverland parts sell good rebuilds. Don't waste anymore money on that engine though.
Drifting
Joined: Feb 2010
Posts: 33
Likes: 0
i have a 4.6L from a 2003, with just 67K on the clock, i am selling the engine to include the intake manifold and probably the exhaust manifolds (if i can get it out with them attached) for $2750. you can email me about it on benpearson05(at)gmail.com
Pro Wrench
Joined: Feb 2008
Posts: 1,706
Likes: 3
From: Meridian, Idaho
Your engine dropped a sleeve... remove the heads and confirm. You will need a new engine unfortunately. I wish LR NEVER EVER EVER EVER EVER used GDAMNED liners on their engines. WTF were they thinking!!!! At least make it so they won't slip! Sorry, just a rant. I am always worried about it on mine.