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Read articles →A first-person owner walkthrough of a full head gasket R&R on a Yanmar SA424 (3TNV80F engine), roughly 30 minutes long. It covers disassembly sequence, radiator and water pump removal, parts sourcing pitfalls (TNV76 vs. TNV80F gasket differences), reassembly, valve lash, and an honest ending: the repair didn't fully solve the exhaust-into-coolant problem. Best for owners tackling the same job who want a realistic, unfiltered account rather than a clean how-to.
Posted by the cvsahara channel, which appears to be an individual owner working through this repair on their own tractor with no professional shop background evident.
They look identical and most parts interchange, but the cylinder size differs between the 76 and 80F, so the gaskets are not the same.
No. After the repair it was still blowing exhaust into coolant, just at a slower rate than before, and the cause was not fully fixed.
The owner checked the head with a straight edge across multiple directions and down both sides, and saw no visible signs of warpage.
The owner estimates it would take about five hours to do the job again, start to finish.
