I am in the process of removing the head off my ym1610. I have loosened the four bolts inside and the two bolts, two studs from the outside. Am I supposed to loosen the four smaller bolts on the inside, or do I need to tap the head with a rubber malt to loosen it?
Inside = if valve cover on the bolts would be inside
Outside = if valve cover on the bolts would be outside
Looking at your head gasket Yanmar Tractor Parts: HEAD GASKET_ you have 8 large bolts/studs as you can see the big holes. You then have 3 small bolts called cylinder head assist bolts. So if you remove 11total bolts/nuts the head should come off. Need to remove rocker arms and push rods as ttstpsvernon stated.
main cylinder head bolts in stages of 29 ft lbs, 58 ft lbs and then 72-79 ft lbs. Start in center and work outward in a diagonal pattern. Cylinder head assist bolts 22 ft lbs. Rocker arm shaft support nuts 40 ft lbs. Valves to set at .008". What else? I have read back over this thread and am curious just what you have found. Any thing you could report??
See what happens when you buy on consignment. It had a poorly welded muffler that went after the first year. However, I should have replaced it myself when it stated wiggling on its own. Putting a can on top did not help because of the crack.
Dont think you can blame this on a used tractor from a previous buyer if thats what you mean? You knew it was bad and he did too, but he may have kept it in a shed so there was no way it could leak into the engine. Dont blame stuff on others all the time if thats what you are doing.
Anyway i hate this for you hate to see anything that is stuck and frozen, good luck and hope you can hone that mess out and its not pitted to deep.
See what happens when you buy on consignment. It had a poorly welded muffler that went after the first year. However, I should have replaced it myself when it stated wiggling on its own. Putting a can on top did not help because of the crack.
Yikes! That is definitely going to take a bit of work to fix.
At the very least, I see a set of rings, and honing. Worst case scenario is that you'll have to have it bored and go with oversized pistons and rings. What kind of shape is the head in?
Looks are always worse than the the actual damage is, Acre Garden. When was photo taken and where are you at now? Keep us posted. She'll be running before you know it.