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Old 10-15-2011, 08:47 PM   #1
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Question about the coolant level.

Ran a search already.

I checked my coolant level (while the engine was hot) and noticed that it was pretty low. I went ahead and added 50/50 coolant until it was at the MAX level.

I left it for about 5 days, because I was out for a vacation. I came back and checked the level again (completely cold engine) and noticed that it was at the MIN level.

I looked under the car for leaks and found no signs of anything. I looked under the air box and around the cooling system for a white powdery substance and nothing either.

My question: Does the coolant level rise when the engine is hot? Thus explaining why the level dropped as the engine became cold?
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Old 10-15-2011, 08:58 PM   #2
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Quote:
Originally Posted by restore View Post
Ran a search already.

I checked my coolant level (while the engine was hot) and noticed that it was pretty low. I went ahead and added 50/50 coolant until it was at the MAX level.

I left it for about 5 days, because I was out for a vacation. I came back and checked the level again (completely cold engine) and noticed that it was at the MIN level.

I looked under the car for leaks and found no signs of anything. I looked under the air box and around the cooling system for a white powdery substance and nothing either.

My question: Does the coolant level rise when the engine is hot? Thus explaining why the level dropped as the engine became cold?
It would, but then, as you open the ET cap when it's hot, it presumably would expand a little more. Why, because you've released the pressure. It's a closed system. Liquid expands when hot, and that creates pressure in a sealed system. PV=nRT Reduce the pressure, the volume will increase.

For now, in the a.m., when it's cool, you should open the cap and get level to between min and max. That way you'll be able to notice a loss of coolant sooner. Check on level ground when the car is cool.

If you have a leak, you'll want to find out from where it's coming and fix it pretty soon.

If you begin to overheat, pull over right away, turn key to pos 2 (stop car, but keep fan and heat on high to let it cool down a little quicker).

HTH
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Old 10-15-2011, 10:57 PM   #3
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Does the coolant level rise when the engine is hot? Does a bear sh!t in the woods?
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Old 10-16-2011, 06:43 AM   #4
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Thanks dmax.

The coolant level actually lowers when hot, so something may be off here. I filled it to the MAX capacity last night while the engine was cold. I'm going to check on it shortly to see where it is now. One thing to add is that I have not bleeded the system.

If there is a legitimate non-visible leak, I may go ahead and do the cooling system overhaul.

How many hours of labor do shops usually charge for that job? I plan to pickup the kit from Tischer's website.

edit: Checked the level and it hasn't changed.
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Old 10-16-2011, 07:20 AM   #5
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Keep adding until the tank blows. Then you are done, and come tell us how we should change our tanks every couple of miles..

Last edited by GoingNuts; 10-16-2011 at 07:22 AM.
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Old 10-16-2011, 07:21 AM   #6
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I was quoted four hours of labour from a shop to do the overhaul.

Took me around six hours with breaks and not having done it before.
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Old 10-16-2011, 07:33 AM   #7
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Keep adding until the tank blows. Then you are done, and come tell us how we should change our tanks every couple of miles..
Don't worry, I'm not like that.

What have you done to your car in terms of repairs? I actually hold a similar philosophy (to you) regarding cars and their maintenance. This being my first "luxury" car, however, changed all that. I hear a squeal, and I'm ready to research for hours on what the cause was...
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