Hey everyone, new here and had a question. I have a 2004 land rover discovery. 164k and runs decent but sense I got the truck two years ago its always has the "land rover tap" in the motor. I've just ran it like it is sense I got it with really no problems besides the noise, figured when it blows it goes. I can't complain I got the truck for cheap.. my question is how difficult would it be if I wanted to put a smaller motor in it? We know our rovers are gas guzzlers and I don't want to get rid of my truck, but gas is killing me. Would a smaller motor fit without doing anything major? And if so what motor? Or would a lot have to be done? Or is this completly impossible without spending tons. By the way, I personally wouldn't be doing this, I would take it somewhere to get it done if this is possible. Any feed back would help. If this is impossible I'm just buying another vehicle and sadly selling my truck. Thanks

 

Your best bet would be a diesel. But being an '04 your truck is probably subject to emissions testing and won't pass with a diesel instead of the gas engine they have on record.

 

You could convert it to TD5, mostly a bolt in conversion.

 

GM 4.3L V6

Tank of an engine.

Do not know if anyone sells a kit for that engine. Doubt it.

One route: 2wd tranny (4L60?) to divorced TC (NP205?) ...would be tasty.

To actually answer your question, this would be remarkably difficult for anyone who is not an experienced/handy mechanic & welder. What purpose does this Discovery serve? They have emissions inspections in your state?

 

Buy a 4cyl 4Runner. Done

 

Discoveries are heavy. Odds are good a smaller engine would be working harder and so get worse mileage, or at best no better.
If you have to do much in the way of modifications to install a different engine then it's likely any fuel savings would be overshadowed by the cost of the modifications, unless you find something that gets a lot better mileage and you put a lot of miles on the car every year.

 

TD3 or TD5 are the only why it could possibly be worth while

 

The only way a smaller engine would be worth while and actually work for the disco is if you used forced induction ie turbo or supercharger. Because of the weight, you need a V8 to push it all around. BUT if you put in V6 with a turbo or supercharger that might do the trick. Only thing is that is going to require a lot of tuning and money. After all the dollars hit the fan it wouldn't offset the cost of fuel. The most reasonable (and cost effective) thing to do is rebuild the engine that is in it and pay a little extra for fuel