Discussion Starter · #1 ·
Hello everyone my father in law has a 2012 550 XUV that starting fouling plugs about 3 month after he got it in 2012. He is the original owner and the machine has 272 hours on it. He has done the regulars oil changes, maint and changing plugs constantly. I starting doing some googling and found that some of these engines came from the factory with bad head gaskets and John Deere was fixing them for free up to 300 hours. I called several dealerships and they act like they have never heard of the issue. I am sure its too late now. Anyway, The only thing I have done to the machine is a compression test and it all seemed fine. I was going to do a leak down test but my tester was bad. I am looking for some guidance on what I can do to 100% identify the problem before I just replace the head gaskets. I am thinking I should start with a valve adjustment. Is there somewhere I can get the service manual? Any help would be greatly appreciated. My plan is to fix it the next time he is out of town. He is 80 year old retired engineer and I want to surprise him.