overheating TR4

Do you have the correct cardboard shroud around the sides in front of the radiator? Cheers, Bill.

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Did you check your thermostat?

you could also have gunged up waterways in the block, or a knackered head gasket.

did you get rid of the original "fan on a stick" ? (I'd put it back, there are tales of cracked crankshafts due to vibrations not being damped by the fan.)

A final thought, no chance of binding brakes or siezing engine is there?

Having cheered you up, I'll go and have a beer.

J.

A fine help you are. Norm (I'll stand you the beer, say, my truck has this problem...)

-- So, so you think you can tell Heaven from Hell, Blue skys from pain. Can you tell a green field From a cold steel rail? A smile from a veil? Pink Floyd, Wish You Were Here

Is it really overheating or does the gauge say it is? The temperature sender might be faulty.

Otherwise, test the thermostat, and when you take it out, have a look in the housing to see if there is a build up of limescale. If so, then the waterways in the head or pump might be constricted.

Is there good water circulation? Is the bottom hose boiling hot when you think it is overheated? If not, have you checked how well the pump circulates water. The impeller (sp?) might be fouled.

Jim

Is the engine is actually boiling and not just show hot on the gauge - electric gauges tend to read hoter as the grow older. Assuming you have done the obvious and changed the thermostat, you should also be able to see if the water is circulating by the running the engine when hot with the raddiator cap off, you can check the water pump by checking if the heater matrix is warm. Check the inlet and outlet temperatures to the rad and thermostat with a digital temperature probe, at top hose it should read about 70 to 90 degrees, on the cylinder head just below the thermostat expect to see 90 degrees while the bottom hose should be much cooler.

-- Also check the ignition centra fugal advance isn't sticking, retarded timing will cause bad overheating at mid to high rpm.