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Hi, sorry for posting such a basic question but i cant see any posts that tells me the answer or in RAVE (well, not so i can understand it). Ref yr2000 petrol 4.0 Ltr Thor engine - looking from the front of the car into the engine bay, what are the cylinder Nos on the left bank (nearest to...

oh **** indeed..........................

its definitely boiling over and not just the gauge

top water elbow - is that the steel tube coming out of the engine where the heater matrix is fed - if yes, then yes its been off - nothing in there.

i wish it was that easy - new rad a few weeks ago. Everything thing in the circuit has been replaced except for the block

when it overheats the radiator all over is cold apart from the very top. the radiator has been replaced - when there is no thermostat the radiator gets hot ( i mean hot, hot) all over indicating no blockage (i understand what you saying about alluminium

Frustrating in an under statement - i am thinking along the same lines - cracked block as it has never overheated whilst on tickover with stat in - it is only under load i get the problem. i dont think the thermosat is opening -its cold underneath whilst being hot on top.

if i am getting good flow across that wax element why then is the thermostat not opening in situ - it opened fine when tested in the kitchen? yes - looking down onto the thermostat both small pipes are pointing to the outside of the car. the bypass is connected to the more vertical sprout and...

checked this last weekend - def correct trace them back. They are different sizes so pretty dif to get them wrong way round. Just had a thought - if i restrict the by pass hose slightly then in theory i should get more flow across wax element in thermostat from the heater matrix - this may...

apart from the fact that i have changed the pump twice i can confirm that when i take off the heater matrix inlet hose and turn engine over ( take fuse out to stop her firing) - she pumps into a bag what look like to be very well - for some reason the temperature (albeit very very hot) of the...

correct

- other way around: stat in - no flow stat out - good flow - rad heats up all over tried 3 thermostats - last one OEM - all do the same

new rad - when no thermostat it gets hot all over

replaced pump a few weeks ago, thought that pump that i replaced may be faulty so bought an OEM pump.Def not pump.

If i fill up the expansion vessel to the neck and turn engine on, after approx 7 minutes the water level rises and over flows - I thought the same about the 2 smaller hoses on the top of the thermostat but they are different sizes and you struggle to get them the wrong way around - checked...

"Just above the blue" was only when i had a wedged open thermostat - i would have expected this reading - what this confirmed was that i had circulation throughout with no blockages. If the pressure was rising surely this would mean that pump was circulating coolant, if this was the case why...

correct - how do you do a flow test ?

The coolant i believe is boiling but if this is the case why does the boiling coolant not open the thermostat - hot coolant is passing through the heater matrix therefore being pumped confirmed by getting hot air in cabin and down from the top hose via the by pass hose - either should open the stat?

New viscous fan - air movement increases with engine revs. New thermostat is OEM - i made sure i paid more for it that i would have normally of done Temperature gauge sits just above the blue marks on the temp gauge

tested stat - all working ok - zzr1200 from this forum can round and we tested it together