bobby

when i first starrt my stang up and it is cold it will knock.sometimes it will last for 30 seconds, and other times it will last several minutes but it always eventually go away , what is it, any help would be great, thanks.

Quik

just about every old 5.0 does that. I have two that do that and my buddies does it also. all three motors have over 120,000 miles. run thicker oil it should help out.

jhogan2424

First check and make sure you actualy have oil in the car.

johnc

It is usually a rod with too much clearance. The oil pressure builds up, and the slop is taken up by oil.

Muscles

He better have oil, a true Stang Lover doesn't neglect their baby!

vfast

heavier oil will make it worse in the mornings,check you oil pressure you could have a failing oil pump or a half stopped up oil pick-up or worse the above just wore out main,rod bearing,wrist pin. if your running synthedic and this is happening changing oil wt won't help either way. you could always go to an exturnal pump so you can primp the engine before starting..one day all cars will have this and engines will last 500k easy<img border="0" src=smileys/smiley6.gif border="0">

Muscles

Uh oh, hope it is not the oil pump, that was a b**ch to change out I just finished doing mine, ahhh I guess it is not to bad once you get going. It fixed my problem, I had the similar thing, except mine was more of a ticking sound, thanks to VFast and a few others here I got the job done, they are great!!!!!!! So Id advise to listen to their info.

Pitviper100

yea i hope you dont have a hudge prob... always sux