Hi everyone, newbie here

I have a great oportunity to buy a 2000 3500 Mini Bus, 100K, 5.9 V8, TBI, OHV, LD, 4 sp overdrive, 3.91.

Any known problems with those units ? Transmission, motor, handling, noise or anything anoying I should know before a put my hard earned cash on the table ?

Thanks in advance !

BTW, what does those letters : TBI, OHV, LD

Ben

 

OHV (Overhead Valve) OHV While all modern automotive piston engines have the valves arranged over the cylinders, OHV engines were named because earlier engines (like the 1930's and 40's) had valves beside the cylinders, not OVER them - so OHV was a a way to differentiate the OHV valve style from say, the Flathead engines. OHV engines have the camshaft below the cylinder head, and thus use lifters and pushrods to help actuate the valves that are in the cylinder head. Compared to OHC engines, they allow for better packaging, but are less efficient compared to OHC designs due to increased valvetrain mass. To open a valve, the camshaft pushes on a lifter, which pushes a pushrod, which pushes on a rocker am, which opens the valve. OHC engines don't have the weight of the pushrod to overcome. While the weight of a pushrod & lifter is seemingly insignificant, when you consider it can account for more than 15% of the valvetrain mass, and it has to open a valve up to 6000 times a minute (or more), it adds up to measurable difference. It's all about inertia - the less weight it has to move, the less energy is required to open the valve, and thus, there is more energy that can be transferred to the crankshaft - meaning more HP to the wheels.

TBI (Throttle Body Injection)

LD I'm not sure about though.



-Matt-