My ?'s are---#1.Does the 4.0 liter 6 have a mechanical or electric oil pump and #2 if it's a mechanical can i still install an electric oil pump as a preprimer tool to bring the oil pressure up before i start it? Or is there something i can use that's already on the market to preprime b4 starting it up?

 

oil pump is mechanical. I can't even remember if I've ever seen an electric oil pump.

What you want is called a preluber. Basically a tank of oil that your oil pump system pressurizes. You have to get out of the car while it's running, and close the valve to trap pressurized oil in the tank before you turn the engine off. Then prior to starting your car again you open the valve and the pressurized oil flows through your oiling system in your engine. There are others I'm sure, probably wouldn't be hard to make one, for the hassle though it just never seemed worth it. There are some out now with an electric circulation pump. Probably a bit easier than the old style but much more expensive. Most of the preluber applications are for heavy, industrial machinery. Oils today are extremely good, I don't know that a preluber would help too much.

 

What is the reason that you feel a need to preprime? All decent oils today will leave sufficient film to protect on cold start. I've owned at least 6 cars that "lived" in the north, not garaged and went well over 200,000 miles w/o ever worrying about prepriming the oil.

 

since i bought the thing it's made an odd noise when i start it after it's sat for 6 or more hours. I took it to 2 different dealers and got some story about it being the long stroke that causes piston slap from the dealers which i think is baloney. But if i turn the key enough to turn it over without starting it and wait a few seconds and then start it theres no odd noises so i figure its got oil into whatever it is that makes the sound and i feel better about it. ergo- i thought prelubing it would solve my problem once and for all