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Last Updated 1/1/13

Series Land Rover - Problematic Noises (Part 2)

The December 2012 the USA homepage dealt with noises eminating from places other than the engine. This month the focus is upon engine related noises and we are primarily concerned with the original standard gas and diesel engines of Series Land Rovers.
General noises

Using a wooden stick, as a stethoscope, to CAREFULLY listen to the water pump bearing whilst the engine is idling slowly.

Many diagnostic noises are commen to both gas and diesel engines:
Squeeling: indicates that a drive belt is slipping on a pulley and trying to impersonate a violin (bad impression!). Feel for slackness in the belt (engine OFF) and tighten it. Inspect the belt carefully for cracks and replace belt if found.
Grinding: If it is at the front of the engine, suspect the water pump bearing or the bearing in the alternator/dynamo. A stick can be CAREFULLY used as a stethoscope to confirm the location of the grinding sound.
Rapid clicking: If from the top of the engine (or also from the side, if its a 2.6litre gas engine) then it's probably due to valve adjustment being incorrect, but could also be a sticking valve. A sticking valve, or even a broken valve spring, would also produce pops and bangs though the exhaust. If the stick stethoscope locates the ticking to the side of the engine then suspect a broken piston ring.
Deep rumbling: Confirmed with the stethoscope as being low down in the engine - most noticeable when the engine is idling slowly. The cause will be worn con rod bearings and/or crankshaft bearings. If oil pressure is measureable it will be low - though maybe not engough to light the iol warnng lamp. The 3-bearing 2286cc engines tend to suffer from this problem more than the 5-bearing.
Gas engines
Knocking sounds in the upper part of the engine can be fuel detonation problems caused by faulty ignition timing, or a cylinder head that needs decarbonising.
Diesel engines
Knocking sounds in the upper part of the engine, coupled with a smokey exhaust, could be a faulty fuel injector.

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