Oil in my coolant tank. What could this be?

50

Asked by recartwright Jul 30, 2014 at 11:34 AM about the 2002 Buick Century Custom Sedan FWD

Question type: Maintenance & Repair

When I had my oil changed 2 weeks ago, they said I should have my coolant flushed since they saw some oil in it.  They do the flushing.  I have an appointment with my dealer's service department Friday, but am nervous about what this could mean.

9 Answers

63,145

Lots of things. From a cracked block to a bad gasket some place. How's it running?

3 people found this helpful.

Do you trust the people that told you that? Do you know for FACT it has oil in it? I agree with those guys, BohoMark and Colin but it's possible the dealer is trying to take advantage of you, spend money on a flush you don't need. If it is indeed a head gasket, you really ARE blowing money, a big waste to flush it before fixing it.

3 people found this helpful.
50

It runs fine. Not hot and no apparent problems. Oil Can Henry's is where I have my oil changed and they are the ones that told me. I saw it when my son checked it for me. Almost definitely was oil and quite a bit. The oil, however, has not gone done since the last oil change and doesn't appear to have any water in it. Thanks for your help. Please keep responding.

4 people found this helpful.
50

The first paragraph I wrote should have said "they (Oil Can Henry's) DON'T do flushing".

1 people found this helpful.
144,795

Are you lossing oil?If you are,then check head gasket,if you are not,flush it,and see if it return,s.If it doe,s then you defenatly have a head gasket problem.

1 people found this helpful.
Best Answer Mark helpful
70

This is an odd situation, usually coolant ends up in the oil pan. If the engine has been overheated I guess there could be a cracked block or maybe you've lucked out and it's just a head gasket. Either way, I'd use a mixture of 50/50 water and white vinegar, it will cut through any sludge that's developed and when you've found the problem buy straight antifreeze and cut it 50/50 with distilled water otherwise you're paying 6 bucks a gallon for the water in the premixed stuff, distilled water is only around $0.69 a gallon. You want to used distilled because there isn't any mineral in it. Happy Motoring! Good Luck.

2 people found this helpful.
5

Have you added any radiator stop leak..That will look like oil in the coolant reservoir...Sometimes a cloudy buildup occurs if you have not flushed in a long time also..and of course the old you need a flush routine..

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