Yet another coolant tank issue

[ScottArizona]

I posted this question in a reply to the below post, but realized I probably should ask it in a new post so as to not hijack the thread.

So here it is: when I had my ppi done on my 99 996 c2 the coolant was a quart low, but there was no coolant light flashing to indicate this. On my boxster the coolant light would flash if the coolant level was just a little under the "min" mark. Is there a way to check the functionality of the dash coolant light? Could it just be that my sensor was bad (a new one is on route, just for good measure). My fear is that someone in the past tinkered with the system to try and mask a larger problem (like a blown head gasket!). Any input would be great. Thanks, Scott.

[Loren]

Does the red low coolant light (next to the 250 mark) come on when you turn the ignition switch to "on"? If not, the bulb could be out.

Secondly I would look to see if the sensor is plugged in - it will be hard to see since it is on the bottom of the tank.

If it turns out to be the sensor you may just want to update the tank too (if it hasn't been done) - since it has to come out to get to the sensor.

[ScottArizona]

Thanks Loren. The new tank, cap and sensor should arrive tonight. I will check the lamp to see if it is burned out.

[siddharth]

I posted this question in a reply to the below post, but realized I probably should ask it in a new post so as to not hijack the thread.

So here it is: when I had my ppi done on my 99 996 c2 the coolant was a quart low, but there was no coolant light flashing to indicate this. On my boxster the coolant light would flash if the coolant level was just a little under the "min" mark. Is there a way to check the functionality of the dash coolant light? Could it just be that my sensor was bad (a new one is on route, just for good measure). My fear is that someone in the past tinkered with the system to try and mask a larger problem (like a blown head gasket!). Any input would be great. Thanks, Scott.

I'm no expert at this but I'd imagine that if you had a blown head gasket, you'd see some oil/black residue in your coolant tank. Also if you had a blown head gasket, your cylinder compression tests would reveal that.

I could be wrong, but it'd be easier to do a compression test and rest your fears than keep hunting for something. Anyways I think during the PPI they do a compression test, so you should be covered (you DID the PPI, right ?)

Also, check the DIY section on how to replace a coolant tank. I added stuff I learnt from my adventure - hope that helps you !

Sid