Blown CAT D-398

JackConrad · October 24, 2009, 05:29:27 AM

Here a a couple photos from a CAT D-398 on an emergency generator at a hospital that "let loose". Cat engines are in some buses, so I think that makes this bus related LOL Jack

wrench · October 24, 2009, 05:34:38 AM

oil overfill, create too much pressure in the crankcase.
wrench

Busted Knuckle · October 24, 2009, 06:20:45 AM

Looks to me that it needed more room to " breath !"

BK

luvrbus · October 24, 2009, 08:05:27 AM

I bet it was a 398 DF running on natural gas those don't do that on diesel,that a good engine in equipment 1200 rpm and will run for ever

good luck

TomC · October 24, 2009, 08:49:09 AM

These were called a 6.25 x 8.00 engine for the bore and stroke (compared to a 4.25 x 5.00 for the 71 series). Big engines, and the 398 was a V-12. Even though Cat stopped making these engines many years ago, still alot of them running. The 3500 series have taken the place. But- since the 3500 series goes to 1900rpm, not the long lived engine like the 390 series. Good Luck, TomC

Tom Y · October 24, 2009, 09:32:44 AM

With 2 rods on that bearing it looks like one or both rods lost their pistons and beat the piss out of the block. Tom Y

Len Silva · October 24, 2009, 03:00:02 PM

A little J-B Weld fix it right up.

kyle4501 · October 24, 2009, 03:40:59 PM

don't forget the duct tape

Iceni John · October 24, 2009, 08:12:47 PM

It's the prototype of Caterpillar's new VCMS (Visual Crankshaft Monitoring System).

Gary '79 5C · October 25, 2009, 04:29:47 AM

Jack,

Any idea of how many hours on this engine ?

JackConrad · October 25, 2009, 06:09:54 AM

Quote from: Gary '79 5C on October 25, 2009, 04:29:47 AM
Jack,
Any idea of how many hours on this engine ?

No, This engine was on an emergency generator at a hospital where my SIL works. No idea how old it was, but probably only ran during scheduled starts for testing. My brother works for a company that installs these generators. I know they are at their cabin for the weekend. I will email my brother tomorrow and see if I can get any additional information. Jack

Busted Knuckle · October 25, 2009, 06:48:26 AM

It's probably a last ditch effort from CAT to pass 2010 emissions! They misunderstood what "clean exhaust flow meant" meant!

BK

junkman42 · October 25, 2009, 10:49:01 AM

No need to analyze this obvious problem! It is simple someone just let the cat out of the yellow bag! John

Fredward · October 25, 2009, 05:36:13 PM

Wow that's one heck of a shot.!Thanks for sharing Jack.
Fred

Lonnie time to go · October 25, 2009, 06:34:45 PM

ouch that has to hurt