I read about block problems fairly often, but it seems like few are verified and most are associated with overheating.

If I have a undamaged block with 100000 miles on it, and I never overheat it, what are the odds the block will have issues?

 

Should be good . If you have a obd2 port get a ultra gage & never get close to overheating again , it will let you know way before you are even close to meltdown . The factory gage one min your fine next min your toast!

 

There are a number of owners in the 200,000 mile+ club. Oil change at 5000 miles or less intervals, maintaining coolant system and reasonable temps go a long way. A 180F stat if you are not in the frozen north helps.

 

The 4.0 had less problems with sleeves and overheating so don't worry about it.

 

Im pushing 175,xxx and going strong. 3-5k oil changes with rotella and maintain the cooling system = worry free.

 

Ok, thanks. I'vd been reading these forums but just couldn't get a feel for how common block problems are.

 

I have seen both engines crack a liner all the way to the cylinder head bolt hole. The Bosch engine is re-known for cracking liners. The blocks are graded for thickness by the factory and you can tell which block you have by the colour of the paint daub in the vee of the block. If your block is not cracked I would rebuild it using ARP studs to hold it all together with instead of those horribly designed stretch bolts that cause all the problems to begin with. If you have ever removed any of the factory head bolts on a Bosch engine you understand to a degree why the liner cracks. You can also get ARP studs for the rods too! So no, if in doubt, check the liners closely for cracks or send the block off to a reputable machine shop that has the proper plates for a Rover V8 so that a pressure check can be done. DON"T BE CHEAP!!!