Posted by Hobo,NC on January 26, 2009 at 04:39:42 from (75.89.251.228):
In Reply to: 8N PISTONS posted by rrlund on January 25, 2009 at 18:46:02:
david gillet said: (quoted from post at 03:46:02 01/26/09) Hi all,I have an 52 8n,I was getting a lot of white smoke from it.I did compression test,all cylinders were about 120 dry.It was running hot also.So I tore it down to find a bad head gaskit and valves needed new seals.I ground vavles and put in new seals had radiator redone.I pulled one of the pistons out to take a look and check rod bearings,The front and rear of the piston had scuffs from top of piston to bottom.it didn"t look severe,but you coould tell it was rocking around in there.Is this pretty normal for the 8n"s or should I replace all the pistons, rings and rod bearings.any info would be helpfull,As I just bought the tractor last year.It had been sitting for a few years so I don"t know the history on the motor.THank you David
A N engine is not different than any other engine,,, scuff marks are not normal,,, are you sure you did find the problem 2 B in the head gasket,,, clean and check the head good cracks can B hard to C,,, it would Have been nice to locate the cylinder in question B-4 the tear down,,, if I were were you were I would go for the kill and replace the rings and pistons if the bore checks out are can B conditioned and still b in spec,,, its possible overheating caused the scuffs if it did then it also probably took the tension out of the rings tho your compression readings did not indicate that,,, a leak down test would have but its 2 late for that now,,, if you want it rite take care of what you C are it will always b their and will B a problem
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