Its hard to sit here for hours guessing, "Oh its got a loose pulley bolt" or "exhaust leak" or "rods knocking" or Oh that reed valve thingy" and "sticky valve" we could guess for hours and for years.... ya gotta make sure everythings all buttoned up good... get a good camera or somethin and lets hear a good vid and pointed where you thinks its from...... how longs it been doing this? IF your oil weight is too thin you might have lil knock in there but alas..... theres no tellin

 

mines rod knock..so ignore my posts people..lol

 

camo31.....No worries about any hijacking, that doesn't bother me if my thread gets people talking about other problems on the same engine or related problems, as long as my problem doesn't get buried that is, haha.

Kiroshu....I appreciate the sitting and thinking on your part, it's what makes this site so great. This has got me puzzled, it hasn't done it for the last two days at all, been driving back and forth to work and all around.....nothing. It never did it before that day that I came home and heard it, and hasn't done it since.....arrgghh!!

This one may be a gremlin that came up for air and went back to sleep, waiting until I am going down the beach or pulling my boat to come back and really screw me, haha, actually that's not that funny.

Anyway, thanks for giving it some thought and giving me ideas, at least now I know that reed valve thingy goes bad on the 3.0.

Thanks.

 

Take the p/s belt off and start the engine. If it's pump related, the noise will go away. Do each of the belts, one at a time, until the source of the noise is located. If you still hear it with all belts off, you should suspect something internal. With all the belts off, the fan won't be turning so watch closely for the engine to start to get hot. Use the screwdriver as a stethoscope trick to help locate internal noises if you get all the belts off and still hear the noise.

Could also be timing belt idler pulleys with toasted bearing.

 

So many things... so many noises.... so many guesses..... crazy.... You could check for hours.... and hours.... and hours.... and hours...... to be honest with you, unless you know when that noise is around it affects the performance of the truck i'd let that sleeping dog lay. Just drive it and don't worry until it becomes a driveablilty prob or extremely loud. Ever heard a 22r-e with 300k on it? Theres more noises than you can imagine but she will still run and run and run and run.... and just let it be i supose for now. Unless theres mroe update......... video.....

 

I have just solved the problem from a similar knock coming from the front of my 3vze engine. After disconnecting all belts one at a time I then took off the top timing belt cover started the engine to find the loud tapping (knocking) noise coming from the the timing belt tensioner. It seems that the hydraulic tensioner is failing, causing the arm of the tensioner to knock on the side of the cover. Changed the tensioner and solved the problem.

Hope this helps.