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Post by glutton4punishment on May 13, 2013 6:35:34 GMT -5
Just to let you know, I've never taken apart an engine before. so for me, this is a big learning and exploring process!
so, I got off the head, the cylinder,and the piston head (HC&P). Remember, the problem was that as I rotated the engine, I would hit a spot of greater resistance, and then it would rotate easy once through the "friction zone".
With the HC&P off, I rotated the engine again. Hmmmmmm, same "friction zone". Looking at the the connecting rod as I rotate the engine (after I fished out the timing chain), the friction came as the connecting rod (CR) was coming out (kind of like when you stick out your tongue). So what I did was spray some WD40 right at the point where the CR is attached to the crankshaft.
Wow, BIG difference! No friction!
Now, before you ask, the engine oil level is full, according to the screw in plug. But there is ONE more interesting thing (for me).
When I rotate the engine, sometimes the cams on the crankshaft get a coating of oil on them, but sometimes not. When it does get oil on it, it only covers about half of the bottom of the cams.
BTW, the crankcase seems to have been apart b/c there's red silicone sealer there.
Well, what do you think???
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Post by glutton4punishment on May 4, 2013 16:42:29 GMT -5
Unfortunately, the spark plug was out when I described the problem.
If I do find the valve dropped....what then do I have to do?
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Post by glutton4punishment on Apr 29, 2013 13:34:26 GMT -5
hi, gang.
I've got a 150cc water cooled sym joyride scooter as a "gift", DOA, around 43,000km.
At first, the engine was seized, but with a wrench to the thing that drives the variator, I got it to rotate.
It wouldn't start with the battery b/c it kept getting "stuck" in one place, i.e. the starter would turn the engine over, but that's all. The battery driven starter would work for a few seconds, hit a spot of high resistance, the engine wouldn't turn any more, and I would shut it off b/c of fear of burning up the starter.
So this is what I would like diagnosed: when I revolve the engine with the wrench, it spins pretty freely till I hit a certain spot. At that point, I have to apply a fair amount of force (let's say 3X the normal amount) to get the engine through the rough spot, and then it spins easily again till I hit "the zone".
Before I take it apart (I'm not really sure it's worth it, and that's a big part of why I'm asking here) what do you think is the problem?
Thanks a zillion.
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