Crown schooly, "A history of UncontroledRevs" ???

superpickle · April 16, 2009, 02:47:50 AM

Saw this on Ebake.. What could be wrong with her

http://cgi.ebay.com/ebaymotors/Crown-38-School-Bus-1978-esd-09-1028_W0QQcmdZVi
ewItemQQ_trkparmsZ72Q3a317Q7c65Q3a12Q7c39Q3a1Q7c240Q3a1318QQ_trksidZp4506Q2ec
0Q2em245QQhashZitem220396884562QQitemZ220396884562QQptZBusesQQsalenotsupported

boogiethecat · April 16, 2009, 06:42:13 AM

What's wrong with her? Probably the fact that it's not a Cummins engine in there!

I'm not sure I'd go for a Crown that has a pancake DD engine. Well maybe... as scrap the body has to be worth a lot.. it's totally aluminum....
Ask Don Fairchild what'd make a pancake DD run away, I'm sure he'd know

PADoug · April 16, 2009, 06:59:08 AM

What happened? It's not there

Hope it comes back.

Dallas · April 16, 2009, 07:15:36 AM

Doug,

It's there... but....

eBay has such long convoluted URL's a lot of website software won't consider the whole thing a URL. If you notice the original post, only the first line shows as a URL.

Put this into your search function at eBay: 220396884562

HB of CJ · April 16, 2009, 11:22:40 AM

Maybe the engine didn't like its owners? Or the kids? He he he. What could cause a 671 to run wild? Burning lube oil? Worn valve/injector seals? Bad rings? Too much oil in crankcase? Hung injector? Hung over driver? Just a bad day?

What can happen to such an engine? Obviously the governor would not govern. How high of rpm can a 671 turn? Anyway, except for all the unknowns, everything is fine? Looks like a flat glass Crown with the heavy body. HB of CJ

Crown Post

Dallas · April 16, 2009, 11:30:53 AM

a hung injector can cause a runaway, as can a rack that is improperly set. The governor control rod could be bent and hang up every so often, I've seen all of these at one time or another.

If it were slurping enough oil past the rings to make it runaway it would probably have such low compression it would be hard to start.

Since it seems to be an intermittent problem I would look for something simple in the governor/rack/injector area.

IT could also be something as simple as the throttle cable hanging up which isn't a real runaway, but will scare the peewaddin' out of you if your driving when it happens.

buswarrior · April 16, 2009, 03:32:06 PM

Dallas hits the nail:

What do they mean by "run-away"?

Stuck throttle is a completely different ball of wax than stuck governor/rods/injector.

One is no big deal, the others, a show stopper unless you got some CA$H....

Something in the fuel delivery system being wrong comes in a long way ahead of the mythical theories of running on engine oil.

Takes a lot more effort (read: abuse/lack of attention/bad maintenance) to run it away on engine oil alone.

happy coaching!
buswarrior

luvrbus · April 16, 2009, 04:00:51 PM

To much idling for long periods the only time I lost a 2 stroke in equipment was from the guys letting it idle for hrs at 500 rpm or bad blower seals. When they gave it throttle it was off to races. good luck

Len Silva · April 16, 2009, 05:50:28 PM

Well, I'm not an expert, but I think that if the engine didn't self destruct, then it probably didn't actually "run away".

If it runs good, sounds good and no excess smoke, I don't think that bit of history would prevent me from buying it. I would certainly check out the entire throttle linkage and governor.