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You will need to remove the rail (busbar) that links the glow plugs.

Then measure the resistance between the centre of the glow plugs (where the rail was connected) and the body (where it screws...

On a GU 2.8 diesel the glow plugs are switched on by a glow plug relay that is controlled by the ECU.

You more then likely had a bad/loose connection that caused this "12v supply lead to the glow...

Hey mate. Check out your relay to see if it is stuck open. I just pulled mine apart to find it welded together causing the plugs to stay on. Good luck!

Yes the glow plugs should turn off after a certain period of time.

This depends on what model and engine you have.

All glows plug are powered by a relay.

Some models the relay is switched on...

there is a relay under the panel next to your battery. And there is usually a timer behind the kick panel to the right of your accelerator pedal

Mine coolant also was a color of coca-cola and foaming like it when I bought my shorty.
Then I drain it and fill new and no color changing more than 9 month.

Coffee colour is usually just rust from the cast block.
The rd28 should be renamed the crackhead.
Number 5 on the head usually gets a hairline crack.

head and or head gasket. sorry

Check that the timing mark on the crank sprocket is at 3 oclock in relation to the keyway at 6 oclock, (see Albi's post)
You need to set the belt up so it's tight and straight between the fuel pump...

4 stroke, remember this.: suck, squeeze, bang, blow, -- intake,compression, explosion, exhaust..

Put it back together and time it, turn it by hand and see if all valves are doing the full travel and not sticking.
If the valves are all good (which I doubt) then it should fire up.
Remove glo...

ZD30 Prior series 4
there should be 4 wires at your MAF they'll be Red, White, Black and White terminal 1,2,3 and 4 respectively,
With the car idling, warmed up to normal operating temp, vehicle...