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TO 35, Z134 gas engine rebuild questions

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01-17-2010 11:39:01

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I'm in the process of putting my Continental Z134 back together. Had to do a quick rebuild after I found an oil pan full of coolant.

Two questions.

First: about the rear main cap that also attaches to the rear main seal housing. Book says to simply remove those two little 1/4" bolts. In my case, not so easy. There are bolts and nuts and there was no good way to hold the bolt heads by the flywheel, while trying to get the nuts off at the main cap. I finally cut them off, and then made special bolts with screw-driver slots that I could hold with a right-angle screwdriver. Seems this can't be how this thing was originally?

Second: Exhaust valves. Just redid my cylinder head. Put in new guides, springs, ground the seats, refaced the intake valves and put in all new exhaust valves (old ones getting kind of thin to reface). Bought the new valves here on this Website. Well, I didn't notice until I went to install the rocker-arms, that these new exhaust valves are NOT drilled to accept the wear-caps that are supposed to go on top (where the rocker hits them). Seems these new valves are made a bit higher and made to be used with no caps. But, there was no mention of the change that came with the valves. Anybody know about this?

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John Graham

01-20-2010 10:31:50

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 Re: TO 35, Z134 gas engine rebuild questions in reply to jdemaris, 01-17-2010 11:39:01  
Regarding the rear main oil seal... I am in the process of changing the clutch and oil seals in the engine. You need to remove the fly wheel and pan.Access is then easy. But of course you must split the tractor .
John Graham

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01-19-2010 14:05:03

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 Re: TO 35, Z134 gas engine rebuild questions in reply to jdemaris, 01-17-2010 11:39:01  
What, if I might ask, precipitated the need to rebuild the engine (with a crankcase full of coolant)? I've got a TO-35 and am getting concerned about what could happen to mine. I have seen a small coolant leak between the block and head by #1 cylinder.


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01-19-2010 17:16:34

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 Re: TO 35, Z134 gas engine rebuild questions in reply to Farmer-Wana-Be, 01-19-2010 14:05:03  
I bought it that way. The guy told me it ran fine but had not been used in years. He put fresh antifreeze in it, just before I got it. A few days later, it was all in engine oil. So maybe the guy didn't know, and maybe he was a liar?
I bought it cheap, so it's no big issue. I was expecting to find major problems inside the engine, but most was fine. No cracks anywhere. Leak was just the sleeve seals. In fact the sleeves themselves looked fine, but the piston ring-grooves were worn.
Honed the sleeves and they look great with no ridge and are already an over-bore size. Main and rod bearing also worn an extra .002"
Also found several broken valve springs and one broken valve guide. Also found three rod piston-pin bushings that basically fell out of the rods (not a press fit anymore). Did the head, put new pistons and rings, but re-used the sleeve. Put in new rod and main bearings, sleeve seals, piston-pin bushings, etc. and now it's fine.

I'm glad I didn't run it long with the sleeve leak. You can spin main-bearings pretty easy if enough water gets in the oil-pan.

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01-17-2010 16:18:11

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 Re: TO 35, Z134 gas engine rebuild questions in reply to jdemaris, 01-17-2010 11:39:01  
the caps are not mandatory. for oem parts call 210 --------

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01-17-2010 13:15:39

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 Re: TO 35, Z134 gas engine rebuild questions in reply to jdemaris, 01-17-2010 11:39:01  
I did a valve job on my TO30 last summer and I had to replace the Exhaust valves and I ran into the same problem but I just put the caps away for someone elses project.

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