Freelander 1. 8

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There are 2 shown in some places when I look for a replacement online. Just wondered if they both need to be done or is it just the green rubber one? See picture attached - if it come out lol!! View attachment 192668

The green elastoplymer gasket is for the inlet, and one that is likely to be the cause of the coolant loss.

The high temperature composite gasket is for the exhaust, which isn't responsible for coolant loss.;)
 
How much coolant would normally be lost if the img has failed?
That depends on the size of the leak. However if too much coolant is lost into the cylinder, then it'll start misfire.
And would it cause the engine to boil?

Not unless the coolant has dropped low enough for a vapour lock to occur.

If the system is bled correctly, and it's still throwing its coolant out the cap, then it's likely the HG has failed. Running the engine with low coolant will also make the HG fail very quickly.
 
There is no white smoke and no oil/water mix anywhere just a lot of coolant loss . Does this still sound like IMGF or HGF?
 
Will an IMG failure draw air into the system causing an air lock?
Potentially, but as the inlet manifold is under vacuum, it draws coolant into the cylinder.


Oh and that composite gasket is for the alloy inlet manifold used on the VVC K series, which needs different gasket. The plastic manifold of the standard K series requires the green elastopolymer gasket.
 
There is no white smoke and no oil/water mix anywhere just a lot of coolant loss . Does this still sound like IMGF or HGF?

It's impossible to say without looking at the vehicle. But if it's not blowing its coolant out the pressure cap, then one assumes the HG is currently OK, or at least not the cause of this huge loss.
 
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