'99 S70 Engine Temperature Indicator

[polskamafia mjl]

...the coolant level...is just a hair below the min line - will this trigger the coolant light?

Yes...that's the only time the light will be triggered.

[DePonce]

Thanks! got some OEM stuff on the way.

I understand this is a close system, how much loss is expected over time if there are no leaks on the system? gee this car is 15 years old and I cant remember adding coolant since I bought in 99

[jblackburn]

Thanks! got some OEM stuff on the way.

I understand this is a close system, how much loss is expected over time if there are no leaks on the system? gee this car is 15 years old and I cant remember adding coolant since I bought in 99

None. Well, very very little. Check the cap as well - they sometimes split in half.

It's time for a cooling system flush for sure. I would find the leak and overhaul the rubber hoses as well.

If you smell coolant when you use the heater, the heater core is also a common leak point as these cars age.

[DePonce]

Will do! Thanks for all the pointers!

[DePonce]

By the way, any pics to help in identifying potential leaks on the heater core?

[DePonce]

I found some videos on YT, I believe I have a heater core leak! One tip is the unexplained sticky stuff on some of the controls on my door, etc! Crap!

[jblackburn]

One tip is the unexplained sticky stuff on some of the controls on my door, etc! Crap!

That's fairly normal for these cars; it's just a coating on the switches that wears off.

Do you smell coolant when the heater's run? Is the carpet near the gas pedal wet?

[DePonce]

One tip is the unexplained sticky stuff on some of the controls on my door, etc! Crap!

That's fairly normal for these cars; it's just a coating on the switches that wears off.

Do you smell coolant when the heater's run? Is the carpet near the gas pedal wet?

Thanks. So the sitcky stuff on switches/controls on doors and dash has nothing to do with leaking/fume residue from coolant? By the way, what's the best way to clean this w/o further damaging the original plastic/rubber?

My sense of smell is not as acute as compared to my wife's - so I can't confirm or deny a leak problem based on smell! I have not noticed any wetness in the carpet either - now that is that time of the year and the heater will run more frequent, I will keep an eye on the carpet.

Thanks again!

[jblackburn]

Nope, no relation whatsoever. A bad heater core may also make a consistent, annoying film on the inside of the windshield that comes back soon after cleaning.

Go to the bottom of this thread:
https://www.matthewsvolvosite.com/forums ... 29&t=34056

I haven't tried it myself, but worth a shot.

[DePonce]

Nope, no relation whatsoever. A bad heater core may also make a consistent, annoying film on the inside of the windshield that comes back soon after cleaning.

Go to the bottom of this thread:
https://www.matthewsvolvosite.com/forums ... 29&t=34056

I haven't tried it myself, but worth a shot.

Good info! I'll keep an eye on my windshield. Thanks again!