Blown head gasket?

2004 MINI COOPER
128,000 MILES • 1.6L • 4 CYL • 2WD • MANUAL
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JAMES ANTHONEY
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My girlfriend's car listed above has brown coolant. it had a head gasket replacement in September last year, new radiator, head skim, valves recut, oil flush and coolant flush but it’s still dirty. It also has a P0301 cylinder one engine misfire. I’m unsure if these problems are related. Any guidance on a possible cause would be great. Thanks!
Apr 20, 2020 at 11:36 AM
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BMDOUBLE
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At this point I would do a compression test and look into the coolant bottle while you are doing it, for bubbles. I had a Mini that gave me all kinds of trouble and ended up being a cracked head on the timing chain side. The only way that I found it was that the previous owner put head gasket sealant in it and it left a calcified trace where the crack was, before that I replaced the head gasket and even told the machine shop to check the head and they didn't catch it! Luckily before I put it on I saw the tell tale hint of a crack. Here are some guides that may help:

https://www.2carpros.com/articles/coolantantifreeze-in-the-engine-oil
Apr 20, 2020 at 1:23 PM
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JAMES ANTHONEY
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Thanks for the reply. okay, sounds good, was just unsure as to why it was still brown after having head gasket done not long ago. Thanks
Apr 20, 2020 at 3:04 PM
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BMDOUBLE
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No problem! let us know what you find, and if you need more help!
Apr 20, 2020 at 4:11 PM
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STRAILER
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Hello,

Is the engine overheating? They may have mixed the blue coolant with green causing the brown color. But if it were me I would pull the #1 plug to see what it looks like. If it is super clean compared to the rest of the plugs you have a coolant leak into the cylinder.

Here are two guides to help us:

https://www.2carpros.com/articles/how-to-change-spark-plugs

and

https://www.2carpros.com/articles/head-gasket-blown-test

Please run down these guides and report back.
Apr 21, 2020 at 11:37 AM
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JAMES ANTHONEY
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The car is not overheating no, keeps temperature fine, thanks for your reply. if I pull the number 1 coil pack thing out and it’s really clean compared to the others. does this mean coolant is getting into the spark plug tubes?
Apr 21, 2020 at 11:46 AM
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STRAILER
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Can you please plug the spark plug or is that what you mean with the coil? If you pull the plug and it's clean compared to the rest you have a coolant leak inside the combustion chamber. here is how you can fix it:

https://youtu.be/Xi41RFMP8Ow

If you want to do the gasket here is how. Check out the diagrams (below). Please let us know what happens.
Apr 22, 2020 at 10:32 AM