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John Deere LX 279 blew blue smoke. Forums said it was blown head gasket. Tore it down and both head gaskets were fine. Re-assembled but still running very rough and jerky. No blue smoke this time.
Any advice to try next?

Did you perform a compression test?

mechanic mark said:

Did you perform a compression test?

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Also a leak down test. If unable then take it to a shop.

Ok. When I get those completed I’ll let you know results. Thank you.