NEW

Hi there can any one tell me if the expansion tank needs filling with coolant my temps sits fine just see it has a tank there that seems to be empty as I said in a post before I’m new to Jimnys hope some one can help thanks

Hi,
The expansion tank should have a fill line marked about half way up and should normally contain coolant. Fill when cold.
I assume this is the same for all Generation 3's, not sure if it ever changed over the years of manufacture.

Looks like a overflow bottle type thing

Should look like this

You can see the fill line moulded into the plastic about half way up.

Thats the one I took rad cap off also can’t see nothing in there there from the cap hole the tempature sits just fine even with heating on or off and had a look for leaks the pipes get nice and hot coming from the radiator do I need to top both up ?

It should be half full of coolant when the engine is cold.
As the engine warms up the coolant within expands and is pushed past the radiator cap into this expansion bottle. As the engine cools the water contracts, this then sucks the water from the bottle back into the engine.
Its possible you are running the engine block low on coolant if its not pushing coolant into this bottle when its hot, even if the temperature gauge says all is ok.

I would top it up to half way, go for a drive then let it all cool. Check its still at half level, if not top up again. You should always have a half full bottle after every run with a cool engine (about 1 inch above half way line with hot engine). If you are continually topping this bottle up you have a leak.

Thankyou il try that so I don’t need to put any in the radiator ?

Normally no, you do everything via the expansion bottle.
However as yours may be low on coolant it's worth undoing the radiator cap and filling to the very top. Make sure the engine is cold before you go near the radiator cap. Then replace the radiator cap and half fill the expansion bottle. Then go for a drive and recheck the expansion bottle level once the engine is cool, top up if required.

Agreed, it looks a little low on coolant. I would fill the expansion tank to the fill line when cold. If it goes down, then you have a leak somewhere. Don’t worry about it going up when it is hot, that is the purpose of the expansion tank.