[FlyingBuckeye3]

About 6 months ago my factory coolant expansion tank cracked and spewed coolant all over the left side of my engine bay. I replaced it with the Rein tank from FCP Euro and had no issues till last week. Before leaving on a 3 hour trip Wednesday I added a little coolant to get just below the max (still within the tolerance). After about 50 miles, the Rein tank cracked and left me stranded. I ordered another to replace it this week and upon receiving, I noticed the Min/Max inside the tank can flex up and down. Has anyone else noticed this? I’m curious if I overfilled the tank as I was just below max, especially if the Min/Max indicator lifted up and read lower than actual.

[e90yyc]

Can’t comment specifically on the Rein tank, but why were you topping off your coolant? Was there a leak, and do you happen to recall how much coolant you added?

[FlyingBuckeye3]

I topped it off because I was traveling 3 hours away, just didn’t want to run on minimum coolant. No leaks that I can see. I added no more than a cup or two of coolant. I have it premixed in a gallon jug, didn’t pour enough to really even notice a difference in the gallon jug.

[KnighTT]

If you got it from FCP Euro, they should replace it for free. Lifetime warranty on all the sell.

[smass]

Did you replace your cap when you replaced the tank? A bad cap can over pressurize the system. OE caps are under $20.

The min max is a floating stick. It will clank around when empty.

[FlyingBuckeye3]

I did replace the cap but with a new Rein cap. It’s difficult to tell if the crack originated at the seam of the tank or the cap itself.