How common are block problems with the 4.0?
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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!!!
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Disco Alan
Discovery II
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07-10-2006 08:18 PM