Metal in oil and knocking noise

2002 HYUNDAI ELANTRA
8,000 MILES • 6 CYL • 2WD • AUTOMATIC
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KARISSAK6
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  • 1 POST
I had a mechanic look at my car and he said it needed a new head gasket and that was it. He did the repairs. A week later the car started making a knocking noise. The same mechanic is now telling me there is metal in oil and it needs a new rod. Is this something he may have caused or should have noticed when putting in the new head gasket?
Oct 14, 2018 at 12:17 PM
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ASEMASTER6371
  • ✓ASE Certified Mechanic
  • 52,796 POSTS
  • ASE Certified Mechanic
Good evening.

When a head gasket fails, coolant gets into the oil. When it does, it damages the main and rod bearings. The clearance increases and the result is the noise.

I never do a head gasket without replacing the main and rod bearings just for this reason. He should have known this if he is a technician. He did not cause the issue as it is a result of progressive damage from the head gasket failure.

You will now need an engine overhaul to repair this issue.

Roy
Oct 14, 2018 at 5:32 PM
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