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speak to wayne & DD. re coolant
Rave has the diagrams but not sure if they're early ones. Rave first came out when the v6 and td4 was introduced in the FL1.
From an earlier post I wrote: The stat starts to open at 82 degrees and int fully open until 102 degrees. On mine my hawkeye ses the fans come on at 109 degrees and go off at 106 degrees. Rave says on at 105 and off at 102.
The rave disk ses:Really? So the readings I got for the fans to come on were much like that!! 109° is to hot imho!! Something like 95° on 92° off would be much more sensible. I wonder why the Freelander is allowed to run at such a high temp? I'm sure the other KV6 powered cars run at lower engine temps. This might go some way to explain why the Freelander KV6 suffers from HGF so often? Sadly I don't have an early UK copy of Rave for the Freelander. I have the Rover car version which covers most things I'd need to know except this!!
Intermotor do cooling fan thermostats/switches to suit different temperature ranges. Bear in mind though that the switches are not precision pieces of kit and they are unlikely to be dead accurate. Can't see any reason why a lower rated switch would do any harm...when hgf is an issue due to possible overheating problems, surely a slightly lower operating temperature is a good option.
The rave disk ses:
Siemens 2000 - v6
The ECT sensor, for engine cooling. With the engine running, the fans come on at maximum speed if the coolant temperature increases to 105 °C (221 °F). The fans go off when the coolant temperature decreases to 102 °C (216 °F).
When the temperature of the coolant bypassing the thermostat is below 82 °C (180 °F), the thermostat remains closed and prevents coolant from circulating through the radiator. When the temperature of the bypassing coolant reaches 82 °C (180 °F), the thermostat begins to open, allowing 'cold' coolant from the radiator bottom hose into the pump inlet and hot coolant from the cylinder block to flow to the radiator through the top hose. The thermostat then regulates the flow through the radiator to maintain the engine at the optimum temperature. Maximum opening of the thermostat, and therefore maximum flow through the radiator, occurs if the coolant temperature reaches 102 °C (216 °F).
MEMS3 – 1.8 petrol
Cooling Fan Operation - Vehicles Without A/C:
The ECM will energise the cooling fan relay in the E-box at a coolant temperature of 102°C (215°F) and will go off when the coolant temperature decreases to less than 96°C (204°F).
EDC DD4 – td4
As the temperature increases, at 88 °C (190 °F) the thermostat begins to open, bleeding cool fluid from the radiator bottom hose through the pump and into the cylinder block. This allows hot coolant to flow from the cylinder block to the radiator through the top hose, balancing the flow of hot and cold fluid to maintain the optimum operating temperature. When the thermostat opens fully, the full flow of coolant passes through the radiator.
What bit does yer need to know from the rave disk?
Ere go. Right click and select "save pic as..." to save to yer pc so yer gets the full size version.
Following the temp question with interest...
Found this on the Rover 75 site, which may be of interest re: 'normal' KV6 operating temps.
Will my KV6 develop into an overheat problem ? - The 75 and ZT Owners Club Forums
The thermostats seem problematic. Any way to fit another unit in?
highly paid and highly trained engineers!!!
May be a moot point, as I seem to have found some disagreement over whether they can be used on Freelanders. Would you gentlemen know whether MG/Rover 'stats can be interchanged with ours?
Thanks, Scott
BTW- my Hawkeye reads roughly the same temps as what you're seeing on both of our V6's. All within spec, and too hot for my taste also. I've setup an "Ultragauge" set to 'alarm' at 110c. on the one my daughter drives.
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