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VL HEAT GAUGE

I have a VL sedan and every time I go up a hill (will air-con on) the heat gauge tells me its sitting just over the half way mark and up to 3/4. Is this normal? I just got a new radiator, thermostat and clutch fan to try and fix the problem, but the gauge is still registering 1/2 to 3/4. Could it be just something simple - the gauge not working properly? or do I need to replace the gauge?

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Could be a few problems...
Does it leak water from anywhere? Does it use water?
If you keep having to fill it up with water, there may be a leak. Check your hoses.

Have you checked your oil? What does your oil look like? You might have a cracked head and water may be leaking into the oil.

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replace thermostat cheap and easy to repalce yourself

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You could also check timing and if using SU carby, check needle size. It can also be that your fan belt is slipping or even the harmonic balancer is twisted on the shaft (causing the timing to be off when it looks right). Also check the radiator is not blocked with bugs stopping airflow from front to rear. To check for a cracked head, look at the oil filler cap for 'mayonaisse'. Its a sign that oil and water are mixing. And also make sure the radiator cap is the right one. Hope this all helps. I am not real familiar with VL's. Cheers

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The vL motor was notorious for being difficult to fill the radiator correctly as it was prone to develope air bubbles and these would develope into corrosion in the head.
The Nissan never had the same problems because the radiator filler cap was higher so less chance of air bubbles. Have a look at the shop manual for the correct filling procedure and follow that.

johnperth

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