I moved this thread and it was NOT useful in the D2 section at all

Most 4.0L engines didn't have SAI which cluttered up the engine bay, oil cooler standard, different fan clutch/fan blade (smaller one piece unit on all 03-04 D2's, 03-04 D2's also had a stupid diaper to keep em from leaving drip marks everywhere. Some people swear it helped cool them, but IMHO it kept the engine bays even hotter as hot air was trapped vs flowing out from underneath the vehicle (99-02 4.0L D2's didn't have it). Different fuel pumps for SAI/Non SAI. 4.0L D2's also had the HP22 while the 4.6L D2's had the HP24 transmission to handle the extra torque/HP.

 

SAI? Sounds like they were having trouble with the emissions of the bigger engines.

Smaller fan? So they made a bigger engine with a smaller fan or only the clutch was smaller?

 

Wow this went off the rails fast,new jeeps are fine as the are new Defenders it will go most places the old ones did without too much issue.

But the Rover V8 has been used in everything from basic sedans to Morgan sports cars and TVR's. The problem the 4.6 in the Disco had was a 190 thermostat as delivered, an idiot light for a temp gauge along with an overly complex cooling system that had multiple areas small leaks could occur.
Many engine were poorly cast with thin cooling jackets running along the inside of the jacket at the rear most cylinders, repeated thermal cycling resulted in micro cracks forming in those areas. As pressure built from under filled and over heated cooling systems the micro cracks expanded to big enough to be a problem, from what I have seen mostly a about 1/4 inch or less long.
The oil and water pumps are pretty marginal too, with very little excess capacity.

It was just an engine that was used for about 5 years too long.

Personally I would take my Disco to Tuk and back for Vancouver with a thought, it is old so it could die on the way, odds are it will be fine but hell that is the fun of it all. That is about 5000 miles round trip 3 1/2 week on the road and good chunk in the middle of nowhere.

 

If I had to choose between the Jeep JLU Rubicon or Defender 90/110 = I'd hold out for the Bronco if I had to have a newer 4x4, I think Ford really put a lot of thinking into the Bronco. Or hold out even longer for the interesting GMC Hummer EV Pickup/SUV with crab walk which certainly is an interesting feature.

 

No SAI on earlier D2's from 99-02 depended on which state it was imported to. Mainly SAI was at first a California thing, but eventually LR just made it a standard emissions feature. Fan wise do some research and see for yourself what I'm talking about. Difference is night and day.

 

The issue was the California market. California emission laws are more strict than Federal law and SAI became standard on the 03/04 model instead of being just on models sold in California.

The emissions on the 03/04 where not a problem outside California with the SAI, it was a LR decision to not have different models being sold in diffent States so SAI was standard.

The 03/04 were classified as exceedingly low emission vehicles when sold.

 

I would love to see this guy join dweb. that would be priceless

 

You guys keep feeding the troll.

 

You can’t bulletproof something with design flaws. The makeup of the engines themselves is flawed. Comes down to the engineering. They tried to push boundaries with new engines and materials that simply didn’t pan out. They had lax tooling limitation standards and tolerances. The engines just aren’t hood for long term. These are not Chevy LS3 motors.

 

besides displacement?