|
|
Post by car6car on Aug 20, 2011 9:34:49 GMT -5
I was repairing car engines for pretty long time. Only about 2% of them died w/o owner's help. Usually coolant or oil leak kill engines.
Sometimes oil is not changed for too long. If antifreeze is not changed, it begins destroying gasket.
What was the reason for damaged engine, you repaired? Let us get some statistics.
How long Chinese scooter engine can run, if oil checked every day and replaced as it should?
|
|
|
|
Post by Scooter Elements on Aug 20, 2011 9:56:34 GMT -5
i have customers that there scoots have more than 65,000 miles on them. they take very good care of them changing the oil often and change parts as they get worn out.
|
|
|
|
Post by Doug in San Diego on Aug 20, 2011 11:16:09 GMT -5
Looking back on what was the start of my troubles.
1) I stripped the threads on my spark plug hole
2) this required a new head (since heli coils for scooter = more than a new head)
3) Having never done it before I probably did not do the best job, because after that I started blowing rings....
Tried A12 cam and BBK
If I had one bit of advice for new scooter owners.
Leave it alone.
Maybe get a better variator and weights. Other than that change the oil and take care of it.
That is my plan for my new engine. (although I do have a UNI and exhaust still (mostly because I no longer have the stock pieces)
Doug
P.S sad to say that all my troubles stemmed from me, but that's how we learn right?
|
|
|
|
Post by sprocket on Aug 20, 2011 11:24:38 GMT -5
The GY6 engine has an average life of 15K-20K miles... after that the crank bearings start to go and the connecting rod bearing fail.
Much of engine life is based on who made the engine. Some are made in modern production facilities others are made in tool sheds...quality varies dramatically.
Generally 2007-2008 are the worst years for the GY6 engine... demand exceeded production and quality went into the crapper...
Many of the 2010+ engines rival the quality of Taiwanese scooters and companies like CFMoto have excellent engines that should last a very long time...
Most of engine life problems are that people know squat about the engines, run them too hard and add on aftermarket crap parts.
|
|
|
|
Post by Doug in San Diego on Aug 20, 2011 14:49:17 GMT -5
How can I tell when my engine was made (given that I just bought the engine) Is there a made on date stamped anywhere? How about an expiration date?  Doug |
|
|
|
Post by larrball on Aug 20, 2011 17:35:48 GMT -5
|
|
|
|
Post by sprocket on Aug 20, 2011 17:59:26 GMT -5
Replacement engines don't have VIN number DAWG... they may have a two letter maker code in front of the engine number on the front of the CVT case.
|
|
|
|
Post by traeldor on Aug 20, 2011 22:10:03 GMT -5
worst mistake........I cleaned a carbureator once, on a volare, slant 6, with no replacement gaskets. (( it was 25 years ago so let it go, lol)). Ran good at idle but no power when I stepped on gas. I've learned a thing or two since then........ READ THE DAMN MANUAL!!!!! Chiltons Rules!!!
Oh yeah and most important, STOP pretending I know what I'm doing, when I obviously don't. LOL
|
|
|
|
Post by 2wheels4ever on Aug 21, 2011 1:39:53 GMT -5
IDK about bad brands in specific but my soon to be resolved issue with my Roketa has taught me a couple things; it is easy enough for some of the most competent people to add too much oil to the case. As far as someone posted, about that causing the rings to bend, may be a little far fetched but it can cause the excess oil to shoot out the vent line. 2; it appears they can run for quite some time on a weak rod, giving off no red flags until you just begin to trust it again after a few belt breaking episodes. 3; a good amount of flashing left in some of the slosh holes in case walls, 4; lugs where cooler lines would go, had they not been bolted in and the heads sawn off, and 5; case gasket blocking 80% of internal oil passage
|
|
