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Coolant Level Question/ Help

J&D2003
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J&D2003 Member

J&D2003

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Currently my car 2003 c4s is using a little coolant. Some background...

- I have searched the forums and found it could be a tank issue.

- My cap ends in 30. Is this one that needs replaced?

- The car runs just a tick over 180 under normal driving, I assume this is normal? Never has gotten out of the middle area, even on a 94 degree day.

- The level when needing filled is slightly below the min level on the tank and never gets lower than this point.

Any help or suggestions would be greatly apperciated. As stated, the car runs and performs perfectly...no issues. Also, I have no visiable leaks under the car. I have checked it after every drive. Thanks for your help in advance. :D

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dr914jr Member

dr914jr

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Check the dipstick and oil filler neck for emulsification. This would be a sign that the moisture has made its way into the engine case and thats ungood. If you don't find any have the cooling system pressure tested and observed for leaks. The part number on your expansion tank cap should end in 01. Is that the case?

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J&D2003 Member

J&D2003

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Check the dipstick and oil filler neck for emulsification. This would be a sign that the moisture has made its way into the engine case and thats ungood. If you don't find any have the cooling system pressure tested and observed for leaks. The part number on your expansion tank cap should end in 01. Is that the case?

As of now I see no sign that moisture has made its way to the engine case...I assume this is the whitish look that I have seen pictures of? Also the cap ends in 30 and not 01. Thanks for the quick responses!

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Loren Member

Loren

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Check the dipstick and oil filler neck for emulsification. This would be a sign that the moisture has made its way into the engine case and thats ungood. If you don't find any have the cooling system pressure tested and observed for leaks. The part number on your expansion tank cap should end in 01. Is that the case?

As of now I see no sign that moisture has made its way to the engine case...I assume this is the whitish look that I have seen pictures of? Also the cap ends in 30 and not 01. Thanks for the quick responses!

I've seen 00, 01, 02 and 03 part number caps but not a 30. Can you take a pic?

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J&D2003 Member

J&D2003

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Check the dipstick and oil filler neck for emulsification. This would be a sign that the moisture has made its way into the engine case and thats ungood. If you don't find any have the cooling system pressure tested and observed for leaks. The part number on your expansion tank cap should end in 01. Is that the case?

As of now I see no sign that moisture has made its way to the engine case...I assume this is the whitish look that I have seen pictures of? Also the cap ends in 30 and not 01. Thanks for the quick responses!

I've seen 00, 01, 02 and 03 part number caps but not a 30. Can you take a pic?

Loren,

Thanks for the help. I will take a pic tomorrow and post it. Thanks for the help as always...

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J&D2003 Member

J&D2003

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Update: The cap does end in 01...Don't know what I am looking at. However, it seems damp on the inside of the cap. What are the symptoms of a bad cap? I have ordered a new one that should be here tomorrow. Thanks!

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Loren Member

Loren

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Update: The cap does end in 01...Don't know what I am looking at. However, it seems damp on the inside of the cap. What are the symptoms of a bad cap? I have ordered a new one that should be here tomorrow. Thanks!

Usually a bad cap sweats or leaks. Look for residue on the top of the coolant tank.

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J&D2003 Member

J&D2003

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Update: The cap does end in 01...Don't know what I am looking at. However, it seems damp on the inside of the cap. What are the symptoms of a bad cap? I have ordered a new one that should be here tomorrow. Thanks!

Usually a bad cap sweats or leaks. Look for residue on the top of the coolant tank.

Thank you Loren. I did noticed some moisture and residue around the threads of the cap. I will update once the new cap is installed and car is driven. Thanks again.

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