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Old 10-25-2012, 12:46 PM   #1
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Default 35plus21 sleeve crack

did anyone facing the sleeve crack or break to 2 pieces(up and down),in my club had happened few cases.
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Old 10-26-2012, 03:28 AM   #2
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did anyone facing the sleeve crack or break to 2 pieces(up and down),in my club had happened few cases.
wow, I didn't know you had a club. how big is "your" club?
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Old 10-26-2012, 04:33 AM   #3
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Yes it can happen. Especially if they overheat or don't have enough castor oil in the fuel.
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Old 10-26-2012, 07:57 AM   #4
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vibration will normally cause this
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Old 10-26-2012, 12:42 PM   #5
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vibration will normally cause this
that means 35plus21 is not well balance engine?
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Old 10-26-2012, 12:47 PM   #6
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Yes it can happen. Especially if they overheat or don't have enough castor oil in the fuel.
usually the engine temp will between 115c~125c,but i don't think that will be overheat.
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Old 10-26-2012, 02:09 PM   #7
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that means 35plus21 is not well balance engine?
A bad working clutch or a bend clutch spring can cause an unbalance on the crankshaft
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Old 10-27-2012, 05:30 AM   #8
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that means 35plus21 is not well balance engine?
Maybe the person causes the engine off balance
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Old 10-27-2012, 07:26 AM   #9
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A bad working clutch or a bend clutch spring can cause an unbalance on the crankshaft
thks,i will check it out
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Old 10-27-2012, 07:28 AM   #10
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Maybe the person causes the engine off balance
not really,it is standard engine.
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Old 10-29-2012, 03:01 AM   #11
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Hi Alex, every weekend I'm at the track I can see why something like this can happen. Many people take their cars straight to the cleaning air compressor after a run or didn't allow enough time for the engine to cool down before blowing cold air at it.

The 9 port liner from the 35+ tend to more fragile as it is thinner than say a Keep-On liner. Rapid cooling from 100+ degrees several times over will eventually result in metal fatigue and cause it to break at it's weakest points, across the port edges.
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Old 10-29-2012, 09:40 AM   #12
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Are you now looking to sell that motor? if so I'd be interested with the right price?
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Old 10-29-2012, 03:02 PM   #13
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It happens from over revving the engine, beyond 40,000 rpm makes for some bizarre vibrations. ( although sounds freakin awesome )

Double check the gears your running might want to go up a gear or two to compensate. probably find that you are a tick or two faster as well
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Old 10-31-2012, 10:57 AM   #14
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It happens from over revving the engine, beyond 40,000 rpm makes for some bizarre vibrations. ( although sounds freakin awesome )

Double check the gears your running might want to go up a gear or two to compensate. probably find that you are a tick or two faster as well
thks CFowler,i will try it
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