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gdbar 11-07-2004 09:26:18 209.102.135.156 56347 Report to Moderator	I just started to pull the heads on my 135 z145 cont gas engine when cleaning off old sludge i found on the heads this # z134 a601 but on the block it has z145 a600 on the mafg tag it has z145 5382 009-011 011-013 oil w20 s? 30 and close to the oil pan it has a-19u can anyone tell me whats up with this engine? other than the obvious i have a 145 with 134 heads [Reply]   [No Email]
Gerald J. 11-08-2004 09:22:14 67.0.108.144 56369 Report to Moderator	Re: z145 ? I've checked some books. in reply to gdbar, 11-07-2004 09:26:18   I've checked the parts book and a value built catalog. The head gaskets and rocker arms are the same. Bore and stroke are different. The heads show different part numbers as do the valves and exhaust valve seat inserts. The MF parts book doesn't show casting numbers. In the value built catalog they show the same replacement rebuilt head for Z134 and Z145 with casting number Z134. The MF-135 parts book shows different exhaust Z134 valve seats depending on vintage, some alloy steel, some stellite. The material for the single style of exhaust valve seat for the Z145 doesn't indicate the material. My I&T shop manual gives dimensions for valve stems but not for valve heads. So its no help. My GUESS at the outside is that the heads come from the same casting, Just machined slightly differently for the Z145 engine, maybe a slightly larger valve head for the larger bore (3-3/8 vs 3-5/16) or always with stellite exhaust valve seats. Or maybe value built doesn't care but makes them all the same when rebuilt. Perhaps the real MF shop manual would show more detail. I picked up a supposed one on Cd-ROM from England but its most another model of tractor and engine and mostly useless. Be sure you get oil to the rocker arm assembly and that the corks in the ends of the rocker arm shaft hold the oil in so the rockers don't wear. They are a pain to fix. Gerald J.   [Reply]   [No Email]
Gerald J. 11-07-2004 18:45:33 67.0.108.193 56356 Report to Moderator	Re: z145 ? in reply to gdbar, 11-07-2004 09:26:18   I think the only difference between the Z-134 engine and the Z-145 engine is the bore of the sleeves (and then the pistons and rings). Everything else is identical. I might check the parts book later if I remember. Gerald J.   [Reply]   [No Email]