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Cub Lo Boy 154 Manifold

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#1 oliver2655 OFFLINE  

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Posted March 25, 2014 - 10:04 PM

I have a cub lo boy 154 motor that we are rebuilding and i noticed that you need to take the manifold off to have enough room to remove the valves. does anyone have any tips on how to get off the 2 bolts toward the center of the manifold? i cant seem to get a socket or wrench on them and im running out of ideas on how to remove them.

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#2 diesel nut OFFLINE  

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Posted March 25, 2014 - 10:39 PM

When I take them off at work I have to take the carb off and get at them from the bottom.  Depending on how bad there stuck I use a short box wrench or most of the time I can get in there with an open end offset wrench and they come right out.  I think the original nuts were brass so they wouldn't rust and from the picture it looks like they might be original.  Hope this helps.      Stewart

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#3 farmerall ONLINE  

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Posted March 25, 2014 - 11:10 PM

If you remove the carb you will be able to have just enough room to get the valves out without pulling the manifold out. It will be tight working around everything but it can be done.

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#4 searstractorfan OFFLINE  

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Posted March 26, 2014 - 10:19 AM

I used a wrench. Had to pull the carb off and work from the bottum to take it off.. Shot them with pb blaster to make sure they loosened up lol

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#5 _swede OFFLINE  

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Posted December 14, 2015 - 09:01 PM

I used an offset box wrench too like the one pictured below. If I recall correctly, the two studs close to the front of the engine (it might actually be the two top ones) connect to the water jacket so if the nuts are seized to the studs you may end up pulling the whole stud out and draining part of the block. Ask me how I know this... :D

Make sure when you reinstall the studs that connect to the water jacket you use a PTFE thread sealant otherwise you'll saturate the manifold gasket with coolant and probably created other problems.

Hope this helps.


#6 _swede OFFLINE  

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Posted December 14, 2015 - 09:04 PM

I want to clarify I meant the thread sealant paste, not the tape.