Alternative to BMW brand coolant?

[JG330i]

Awesome!

Thanks man for the tip!

I'll go ahead and get some 50/50 mix shortly. I probably will just top it off with some distilled water for now.

~Jon

[danewilson77]

I think mixing said amount prior to adding is preferred.

[JG330i]

I think mixing said amount prior to adding is preferred.

Will do!

I'm doing this tomorrow and am also going to try and see if there might possibly be a leak :crossing fingers there isnt: or the sensor has gone bad.

[BCS_ZHP]

Searching for leaks, take the tension off your serpentine belt and try to wiggle the pulley on the water pump, there should be no play. If there is, leak is probably from the weep hole on the bottom side of the WP. Also look at the o-rings on the expansion tank cap. If they're not plump and protruding, you may be losing some vapor right there and it leaves no sign of a leak. This latter situation was the case for my wife's car. And while you have the cap off, look at the coolant level thing, it looks like a bobbing thermometer. A tech told me it should be dark red in color, if it's faded to pink or white then it's time to replace the expansion tank at a minimum and maybe a whole cooling system refresh.

[JG330i]

Searching for leaks, take the tension off your serpentine belt and try to wiggle the pulley on the water pump, there should be no play. If there is, leak is probably from the weep hole on the bottom side of the WP. Also look at the o-rings on the expansion tank cap. If they're not plump and protruding, you may be losing some vapor right there and it leaves no sign of a leak. This latter situation was the case for my wife's car. And while you have the cap off, look at the coolant level thing, it looks like a bobbing thermometer. A tech told me it should be dark red in color, if it's faded to pink or white then it's time to replace the expansion tank at a minimum and maybe a whole cooling system refresh.

Good to know! I checked all of the above and all seems fine. I think its simply a sensor and that is about it. My indy mechanic is gonna look more into it sometime in the next week.

[BCS_ZHP]

The coolant temp sensor is plugged into the lower radiator hose. Not that expensive and it has an o-ring on it to make the seal. Possibly that o-ring is not plump and protruding and you're losing a little bit every time you drive. If you pull that sensor, have someone nearby to stick their finger in the hole while you get the new one to install.

[JG330i]

The coolant temp sensor is plugged into the lower radiator hose. Not that expensive and it has an o-ring on it to make the seal. Possibly that o-ring is not plump and protruding and you're losing a little bit every time you drive. If you pull that sensor, have someone nearby to stick their finger in the hole while you get the new one to install.

Cool! Thanks for the tip!

I'll probably get this fixed in the next week or so. My car has been heating up nicely lately, but the air has been blowing way too hot...I think maybe this might be the cause?

71 feels like 90!

[Jesse M]

Prestone baby!

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