Parts Ordering for Chinese Engines

[mbryner]

Well, he said he found a good one.  $37 total for sleeve, O-rings, and shipping.   And he had more parts for Changfas available.   I told him to come over to this forum and he might find takers.

I can see how blow-by itself is not that awful, but it's blasting oil all over around the engine, and I'm going to have to keep filling the crankcase after each time.

Marcus

[Tom Reed]

When its blowing the oil out of the crankcase its time to fix it.

[Henry W]

Tom is correct. One thing you do not want to have is a runaway engine. This can happen with engines where the crankcase is vented in the intake. When the oil is going past the rings causing lots of blowby and than getting sucked in the intake it could cause a run away condition. Do not wait for this to happen.

[vdubnut62]

Had a runaway like that on an 85 Jetta in a hard curve. I was lucky, at 48hp I was able to kill it with the brakes and not lose it.
 In a stationary application if a fellow wasn't right there and able to plug the intake-- I guess it would scatter bits everywhere?
Maybe the genhead would come apart first?

[veggie]

My understanding is that a diesel runnaway occurs when the turbo oil seal leaks sufficient oil into the intake and the engine runs at full speed without throttle control. Theoretically the engine will run this way until it breaks or runs out of oil (or the user stops it).
However, I have never heard of a diesel runaway ocurring from piston ring blowby.
Presumably there is not enough fuel in the blowby mist to power much more than an idle speed ?
I could be wrong, but a blowby runaway does not make sense to me.
Anybody seen one ?

veggie

[Hugh Conway]

Over-speed caused by blow-by? Not exactly, but.....

  I had a problem with my newly acquired Japanese grey market truck. Sometimes it would go into runaway mode for no apparent reason.
I was new to any diesel engines at the time, so asked several mechanics about the cause.........all answers were very costly repairs.
This was a normally aspirated engine BTW. After about the third exciting occurrence, I realized the runaway situations were happening when driving uphill.
The third time I could not shut down. We pulled over and bailed, expecting the thing to blow up, smoke everywhere, couldn't even see the truck.
It eventually stopped on its own. After a cool-down, it restarted, I drove carefully home.
In the end, I discovered someone had replaced the original dipstick with a shorter one from an unknown source. Filling the crankcase to the mark on the wrong dipstick took about 6.5 quarts instead of the designed 4 quart capacity. Drained some oil, never had the problem again in 100K miles. Found a different dipstick and added my own marks.......
Sometimes a simple solution serves, just have to find it!!!

Cheers,
Hugh