What is your coolant level height at the fill point on the engine after you have driving for a week and check it first thing in the morning?

Since the expansion tank (AST) is below the fill point on the engine after you drive the car a while will the coolant always be down an inch or two on the fill point on the engine?

 

Not near the car at the moment, but from memory between 1" to half inch down seemed to be the stable normal coolant height, below the filler cap lip.
Never moves below that/never have to add anything, even after months of use (I'm probably one of the lucky ones though) stock setup, still have the stock AST too.

I run straight de-ionised water only, plus a bottle of Redline water wetter, and a sacrificial anode in the middle iron housing and I have no dramas. Idles and runs at 80C, push it hard and I get 90- 98C temp.
After a hard run, give it time to idle, then park it, open the hood with the fans running, and it will help the plastic components live a little longer

 

factory, expansion tank is lower than fill point. Seems like the coolant would always be low.




Something higher than the fill point seems like it would work better.

 

Thanks for checking for me.

 

Anyone else care to upload a pic and comment.

 

Mine stays full to the top. Always.

 

Can you take a photo of your engine bay please that shows the fill point and your ast height in relation to your fill point.

thx for the quick response.

 

Mine is similar to your photo racerx7, I run no AST and .9bar cap.

 

thanks for the post.

I a trying to figure what normal is for our cars.

On regular cars the radiator sits perpendicular and the radiator is higher than the engine. That makes it easy to always have coolant in the engine and get all the air out.

FD the radiator is slanted and LOWER that the engine. The fill point is above the engine but the AST is lower. I know on german cars they have their AST above the engine.

 

 

Mine varies a little from full up into the filler neck down to about where yours is. The difference is only about 1 ounce.

 

Mine would look full or dip a 1/2" after letting the engine cool after running it at normal operating temperature. But if I let it sit it would always drop several inches. I'm in the process of redoing some things on mine right now and I found I had a slight leak where I tapped into the throttle body coolant line for a water temp gauge. Coincidentally it was where the coolant would always settle to. I new I had a slight leak somewhere, because no matter how many times I burped the system I always got a little air in it. (I'd hear a gargle in the fill neck after turning off the engine and popping the hood.)