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Load noise


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2005 Ford mustang 203,276 miles. I’m just a girl who can’t afford to take my car to a mechanic so I’ve been doing my best to take care of it needs. It was overheating so I put in a new thermostat. Did a radiator flush and changed out temp sensor gasket which was bad. All that went well but I think from driving it while overheating I may have cracked a head gasket. It had all the signs of a blown head gasket. I watched your video about using the sealant, and I went ahead and followed it to the T. Now 100 miles later after the sealant, the car is making an extremely loud internal noise. It sounds like it’s coming from where you would put the oil in. Like something broke loose and is going to town knocking or like a helicopter landing. It’s not as loud when driving it compared to idling maybe that’s because I’m driving and I can’t hear it. . The check engine light is on all that it’s reading is misfires. I was going to change the spark plugs and doing oil change. I just haven’t made it that far yet. There’s still fluid in the radiator. It’s not overheating. There’s no other signs of anything wrong besides the loud noise. The car was running great prior to this. I did, however, turn on the AC when I was on the freeway, and once I got off the freeway is when I noticed the noise and turn off the AC. 
even with the loud noise, the car is actually running fine. Unfortunately I do have to drive the car. - Single parent of three, no backups.- 



This topic was modified 2 months ago by desosa8789
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3 Answers

Unfortunately, it sounds like the blown head gasket has torched your engine.


Is there oil in it? What does the oil look like?


"Sealants" are at best temporary bandaids and at worst can cause engine damage. Of course it is possible that the noise is coincidental.

What you might want to do is an oil change and see if there is anything suspicious in the oil, chunks of metal or pieces of sealer material that may have gotten into the oil via the blown head gasket.

Are you sure the noise is coming from inside the engine? Noises can telegraph all over the place and it can be hard to tell. A mechanic's stethescope can help pinpoint noises. You could also remove the fan belt and spin all pulleys to make sure you're not hearing some belt-driven accessory in its death throes. (You could also run the engine VERY BRIEFLY with the fan belt off to see if the noise persists.)

It is also possible for a worn harmonic balancer to make knocking sounds. However if it's a rod knock the engine is done for and will self-destruct in pretty short order.