andersonj05

So we all know most of these 4.0's have a tick to them. Well mine has went from a tick to a mild knock in the past few days. I am 97% sure its coming from the top end i am thinking might be the lifters because it speeds up as i rev and then goes away until it idels down. Any help on checking/changing lifters on these 4.0's would be great. This would happen the week before i have a trip planned to MSORP, but it can be a main and my ***** will still hit the trails. If it blows good excuse for a 4.9 stroker

djb383

If I'm not mistaken, the lifters are down low inside the block but there's a whole lot of shaken goin' on up top under the valve cover (valve train).

kojoff

Mine has had a tap coming from the top end since I bought it. Not gotten worse or better, but you said yours has become a knock. I would look into it, at least try to button it down to a lifter or rod, or someting else entirely. Id rather know than to have it crater suddenly.

Bustedback

Are you sure it's not a exhaust manifold gasket leaking?

andersonj05

Its not really a "knock" i just knew no better way to describe it. I would say a tap is a better choice of what it is.

Would that make a tapping noise?

kojoff

Yes, weird huh? But that would cause a pop that sounds like a tapping.

andersonj05

Never would have even considered that. Could i just start it up and feel around it too see if i could feel anything?

Bluemax

well it's probly not recomended but i did it to see if mine had an exhaust leak. i ran a lil bit of marvel mistery oil through one of the vac line's. it smoke's a good bit so you can see where u got a leak at

kojoff

Not if its hot. You might could if it were a cold start. I cant get my hand under the intake to do that but, if you can....

Caish

I'm going to say it again....
Use a long extension, or even a long pry bar.
Put it to your ear, and touch the valve cover, then the block, and even the altenator and power steering pump till you can HEAR it through the bar.
Till you do that any advice you get is just conjecture.

andersonj05

I just got ahold of one of those stethascope(spell check) things with the long metal end. I am going to try to pin point it with that. Thanks your way works too.

Bustedback

Yep, a tapping, a ticking, and other kinds of noises.

xj_maniac_newb

well if she breaks down i can just haul you back

andersonj05

Sounds good too me. LoL but i hope she stays together.

xj_maniac_newb

Na she's got it, you should have heard my old 89 yota.....JEEZ that thing growled at you when it cranked up, and i gave that thing hell too. Did pretty good to hold together with my shinanigans at 217 xxx. And the 4.0 is a beast so if that little 1.8 can hold it's own then yours will be fine