4.2 headgastket problems?

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davran

4.2 headgastket problems?

#1 Post by davran » Tue Nov 23, 2010 4:33 pm

All,

I've read that the 4.2 engine in the LWB RR Classics was a stronger engine, which was originally designed to be a diesel, but didn't end up being strong enough for that. Do they have the same head gasket problems as the 4.0 and 4.6?

Thanks,

rezdiver
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#2 Post by rezdiver » Tue Nov 23, 2010 5:15 pm

i believe it had around 20 more hp, but still had the same headgasket issues. and i do not believe it was ever designed to be a diesel, i dont think that is even remotely possible with that engine block. as far as i am aware it is a bored and stroked 3.5 standard gas engine block.

davran

diesel project info

#3 Post by davran » Wed Nov 24, 2010 6:01 pm

So the block wasn't a diesel project, but some engine parts were:

4.2
Land Rover extended the 3946 cc engine for the top LSE[6] specification of the Classic Range Rover. The 4.2 L engine had a displacement of 4,275 cc (260.9 cu in), and used the crankshaft castings from the failed "Iceberg" diesel engine project.[7] Bore remained the same at 94.0 mm (3.70 in), while stroke increased to 77.0 mm (3.03 in).

Applications:

1992–1995 Land Rover Range Rover

http://en.wikipedia.org/wiki/Rover_V8_engine

Project Iceberg
In the late 1970s, British Leyland became aware of the increasing importance of diesel engined cars to the British and European markets in the wake of the 1979 energy crisis. It was decided that a new series of diesel engines powerful, refined and economical enough for use in BL cars was needed. However, with development funding tight, it was necessary to use existing BL petrol engines as a base. This included a diesel version of the 3.5-litre V8, the development project for which was code-named 'Iceberg'. BL collaborated with Perkins Engines of Peterborough to develop a turbocharged unit using a Stanadyne rotary mechanical fuel injection system. Power outputs of around 100-130 horsepower were achieved. The Iceberg engine was slated for fitment in the Range Rover and the Rover SD1, but the project encountered problems with failure of the alloy cylinder heads and internal cooling. They were limited by the need to use the same basic block casting as the petrol engine to allow the Iceberg engine to be produced on the same production line to reduce costs. BL finally pulled out of the project in 1983. Perkins initially decided to pursue the project alone, and even produced advertising brochures for the engine as an industrial power unit, but BL withdrew all technical support and Project Iceberg was wrapped up in late 1983. BL's other collaboration with Perkins (producing a diesel version of the O-Series engine) produced the highly successful 'Prima' unit. BL (and its Rover Group successor) bought in 2.5-litre 4-cylinder turbodiesel units from VM Motori to use in the SD1 and Range Rover.

http://www.worldlingo.com/ma/enwiki/en/Rover_V8_engine

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