richnsx said:

Freelander V6 65K Miles

I have two current issues.
1) Loosing coolant again at rapid rate. half gallon in 40 miles.
2) Engine noise...drone after 10 mins of running.

As history I had what appeared to be a HGF on the back head in Dec. My mechanic machined and replaced gasket on both heads.

NOISE: Since then I have noticed a strange noise. (can't recall if it was there prior).
- not present upon cold start up.
- noise starts after say 10mins of running
- sounds like a droning or engine laborring noise.
- appears to come from rear of engine.
- no noticeable change in performance
- does not seem related to drive-train as noise is present in neutral and also when stationary.

COOLANT LOSS: The coolant loss is as I said about 1/2 gal per 40 miles. Like before no obvious signs of leaking.

I am taking back to my mechanic but wanted to check others first.

R

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Tempus Fugit said:

Hippo

Why does the V6 in our cars run hotter than than it does in the MGR cars 75 and ZT? Is it possible to get them to run cooler as surely this would make them less prone to suffering with HGF?

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• Yes it is under warranty and is back at the mechanics now. He is checking for obvious leaks etc.
• We did check the oil dipstick straight away and confirmed no "milkly appearance". That seemed to satisfy him that coolant was not leaking to oil.
• Will advise what I hear.

• It is proportional to engine speed vs road speed. In fact it is independent as sound is still present in neutral or stationary.
• Also noise only starts when it warms up. Approx 2 miles. The car sounds great initially and then the laborring or groaning noise starts.
• I am fairly confident (80%) that the noise first started after I had the HGF....so wonder if it is a re-assembly issue.
  • HGF repair included: both heads re-machined and new gaskets; new cooling pump; and new timing belt.
  • Was wondering if timing belt job might be done wrong....but would noise be present even on initial start up.

Hippo said:

Don't know to be honest. I've had an air flow meter put under the bonnet in several locations and there plenty of air flow around the engine when driving. Even round the back. So it's not as if it's sheltered from the wind. LR set the software so it ticks over at higher revs when cold so they must want it up to temp where it will run betterer or more economically. Betterer fool burn etc. But why they run hotter I don't know. Not sure about the zt and 75 setup. Most of the stuff is the same. Only thing thats majorly different is the addition of the IRD with coolant flow through it. zt and 75 can have an auto too I think so that rules that out.

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Tempus Fugit said:

Hippo

Why does the V6 in our cars run hotter than than it does in the MGR cars 75 and ZT? Is it possible to get them to run cooler as surely this would make them less prone to suffering with HGF?

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Tempus Fugit said:

Thanks Hippo

75/ZTs have autos. Fans kick at 100c low speed and 106 for high speed, I see the fans come in on ours at 109c?

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Nodge68 said:

It doesn't run at a different temp to the other KV6 powered vehicles as they all run the same temp thermostat
The cooling system on the Freelander is harder to get all the air out after a coolant change as there are less bleed points, and there are also more pipes for the air to get trapped in. The engine is also worked harder in the Freelander due to it's extra weight.

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Tempus Fugit said:

Right thank you. Had the coolant changed very recently and have had to top up a couple of times. Was wondering why, but it's the same for the 75/ZTs they take some time to settle following fluid changes also.

Good job I'm used to lifting the bonnet and checking.

Sorry for hijacking your thread OP.

Thanks again.

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Hippo said:

My hawkeye ses the fans come on at 109 degrees and off at 106 degrees. Usual running temp is 90 degrees when moving. When cold like this time of year (tis still winter) it can be 70 to 80 degrees until you stop for a short time then get going. Temp is then hotter. Rave says on at 105 and off at 102 degrees.

I was thinking about this topic today and thought the difference between the FL and zs/75 is weight and size, with the v6 FL having to work harder because of this.

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Tempus Fugit said:

Recently aquired a Torque App for the phone and it too shows fan on at 109 and off at 107(?), it also mimics the On Board Display (OBD) of my ZT 1.8T quite accurately so I'm fairly confident these figures are accurate. Is there anyway the fan operating temps can be reduced so that it comes on earlier - say 106c for example?

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