DieselEngineTrader's FREE Diesel Engine Forums

new topic search Categories login

Thread Title:

ISUZU Diesel - Asia nightmare

Created On Friday March 09, 2007 22:30 Diesel Talk
Diesel Talk Forum

Diesel Talk Forum
Posts: 1
Joined: Mar 2007

Note Friday March 09, 2007 22:30 View thread in raw text format
Diesel Talk
The vehicle is a Jeep CJ3, Viet Nam war veteran lady. The engine is an Isuzu KB 2400cc diesel. This engine is commercial, low tech, low quality. As an FYI, there have been more of these engines made than all US diesels combined. Half of Asia has rolled on the KB engine for about 35 years. Call them reliable if very primitive. The fuel injection pump is a Kiki. The engine is recently rebuilt. The fuel pump is recently rebuilt.

The problem. The engine always idles rough, smoothing out as RPMs increase. It was the same before the engine rebuild. Sometimes it runs smoother and has more power than other times. At very low RPM's it is gutless. Grandma could yard hay bales through thick mud better than this critter can take off up a hill. At higher RPM's it is a serious threat to the U-joints. I ended up having to change the old jeep driveshafts out and adapt heavier truck shafts in to keep the torque from ripping the u-joints to shreds.
Could someone give me a list, in order of probability, what to check and try fixing to get bottom power and smooth out the idle?

An oddity: This jeep was an Air Force munitions and equipment hauler with the lowest speed gearing a jeep can get. Top road speed is about 50 MPH with the valves almost floating. Thus I drive slow. I treat the engine like my old Cummins. Driving reasonably slow, in town I get around 12 to 15 miles per gallon. When I get out on the highway, keeping her at about 45 MPH, she gets close to 40 miles per gallon. Why the great difference in mileage? Is this to be expected from mini diesels? Is this a part of the problem?
Diesel Talk Forum
Reply Diesel Talk Forum Quote Diesel Talk Top Diesel Talk Forum Bottom Diesel Talk
Diesel Talk Forum
Adelman's Truck Parts Corp.
Adelman's Truck Parts Corp.
Young & Sons Inc.
Diesel Sales
Nationwide Transport Services, LLC
Big Bear Engine Company
Advertize on Diesel Engine Trader

Customer Testimonials


Subscribe to our mailing list to get all the latest DET news.as well as daily or weekly notifications of new engines, gensets and spare parts listings.

'Listed a few engines to see the response and we're getting calls every other day!'

Richard Bemsee, Live Oak Diesel, Florida, USA

'Had an Deutz engine in our yard for 10 years then we thought - let's try listing on DieselEnginetrader.com and it sold within 2 weeks!'

Steve Spencer, Midwest Engine Inc., Michigan, USA

'Our volume of calls has increased and we've had lots more email inquiries from around the world since listing our inventory. DieselEngineTrader.com. is fantastic value and definitely an asset to our business.'

Brian, Adelman's Truck Parts, Ohio, USA