I spent my whole life laughing at Land Rover owners as a Toyota fanboy but eventually the sheer beauty and awesomeness of the Discovery won me over and I made a potentially stupid purchase. Here's the situation:

1. The car - 2006 LR3 SE. 140,000 miles (225,000km). BLOWN HEAD GASKET. Purchased for $1,500 USD. Estimate from local shop is about $5,000 to repair or replace. Someone replaced the air suspension with coilovers already but everything else appears to be stock.
2. The project: First, my goal is to have a fairly bullet-proof vehicle that I won't really need to worry about for another 100,000 miles or so. Everything I saw online indicated the LR3 was the most reliable version of the Discovery. I'm aware that I will be spending "more than the car is worth". My view is that if I invest, say, $10,000 total in this, I could have a car with a new engine and a lot of upgrades that will keep it on the road for a long time. Alternatively, I could buy a 4 Runner or Land Cruiser with 300,000 miles on it for the same cost and cross my fingers nothing goes wrong. And maybe worse than that, I'd be just another dude in a Toyota. My core bet is that a "rebuilt" LR3 is at least as reliable, if not more reliable than a questionable 300,000 mile Toyota.
3. I need help! Aside from the therapy to fix whatever is wrong with me to think this was a good idea, I'm looking for some advice from you seasoned LR3 veterans. Knowing that I will have the engine removed anyway, it seems like an ideal time to get some future-proofing stuff done in the engine bay. I'd love to hear everyone's thoughts as to what upgrades or maintenance items you would recommend while the engine is removed. Then, what are some other upgrades or maintenance items that you would recommend after the engine is back in? Anything to upgrade the transmission, maybe or are there any common failure points that I could upgrade to better-than-new perhaps? If you've got ideas, I'm all ears!

Thanks in advance!

 

Specs help..... what engine? The 4.4 rarely blows head gaskets. That Jag engine is pretty much bullet proof with very few issues and those are well known. As for the other engines, well they can blow head gaskets as well as other issues.

 

It’s a 4.4 V8 gasoline engine. The “bulletproof one” lol. My hope is that if I rebuild it or get one that has been refurbished it will last another 100,000. I’m planning on replacing the cooling system and flushing the heater core when the engine is out. Also replace the water pump. Not sure the spec of the transmission though. Aside from preemptively servicing the transmission, is there anything that comes to mind that should be addressed while the engine bay is gone? I’d hate to get all that work done and have a small or inexpensive part that costs thousands in labor go bad.

 

Are you certain, with no doubt, that a head gasket went? I know of a couple instances on the forums here where a shop said it was a head gasket issue but it was not. So keep that in mind.

As for parts to service with engine out. Depending on milage..... the AC compressor is hell to get at with the engine in place. You may want to slap a new one on as part of the engine install procedure. Otherwise there is not much beyond the usual engine swap stuff like a rear main seal on the engine and maybe the pump seal on the trans - again for peace of mind and they are cheap and fairly easy to do. O2 sensors are a pain, well the upstreams. So maybe some new ones. I would go over the exhaust manifold bolts, they work free after a while causing small leaks that sounds like engine ticks. There really is not much because while the engine is a tight fit it is still an old school design so there is not much on it.

 

Thats very helpful and I’m keeping my fingers and toes crossed that it was misdiagnosed. I had it towed to a shop and they’re going to perform a leak down test to confirm. The owner said they had it maintained regularly with oil changes every 5,000 and said the shop only wanted $1,000 to fix it. That didn’t really add up to me so there is a decent chance something else is going on. The car has been sitting in a driveway since 2019 so he may just be remembering some of this stuff incorrectly. Regardless thank you again for your advice. I definitely am considering the ac compressor. It’s a $650 part from Atlantic British but I saw someone do that job online and I don’t want any of that!

 

A Nissens compressor is cheaper. I think around $300? That is the brand I went with. Same brand for condenser and even my radiator too.

 

Great tip!!

 

Hey good luck man. I’m in a similar situation, just bought an LR3, 2007, for $1600, and currently still troubleshooting how to start it back up. Unlike yours it’s the v6. Anyway, best of luck to you.

 

Awesome and good luck! I was lucky enough to be able to take it to a shop where the owners let me look over their shoulder while they worked and they explained to me what they were doing. They are close to my office so I went and watched them diagnose the car over my lunch break. While they aren’t 100% certain yet, there seems to be a chance that the head gasket isn’t blown and it seems more likely that it’s a fuel issue at this point. There was a pretty bad coolant leak, and the fuel mixture was very rich. It seems as though that created a potential white smoke combined with the overheating that may have misled the last mechanic. Of course, it could be both a fuel issue and a blown head gasket so we shall see! I’ll let the car run tomorrow and see if it overheats. Fingers crossed!

 

The PCV valve can fail in a state that can cause smoke out the back. Also poor running engine at time. Why? No clue. But here is two examples:

https://landroverforums.com/forum/lr3-28/smoke-water-coming-out-exhaust-pcv-something-else-111992/

https://landroverforums.com/forum/lr3-28/2006-lr3-pcv-valve-114759/