tjblack03ss Posted April 2, 2014 Report Share Posted April 2, 2014 Well on my way home from work just getting into town I started to hear a tapping and screatching sound thought it was the truck next to me so kept driving. As I got down the street I could still hear it so thought my engine was knocking so I parked it. I have my valve cover off and on the driver side the second rocker from the front had way to much play. So know my question is how would I know what is bad pushrod seems fine but I'm not sure about the rocker is bad or if it's something more internally bad Quote Link to comment Share on other sites More sharing options...
12'SROCK Posted April 2, 2014 Report Share Posted April 2, 2014 Post a video of the sound if you can. Is you oil psi ok? Quote Link to comment Share on other sites More sharing options...
dieseltech320 Posted April 2, 2014 Report Share Posted April 2, 2014 (edited) not sure how reliable this is on smaller pushrods such as whats in our trucks. but I work on 18 wheelers and an old fashion way of checking the push rods is to drop them on the floor, concrete or something hard, about 10 in off the ground and should all have relatively the same sound. if one is bad you we hear a definite difference in the sound it made Edited April 2, 2014 by dieseltech320 (see edit history) Quote Link to comment Share on other sites More sharing options...
Blown 346 Posted April 2, 2014 Report Share Posted April 2, 2014 Some push rods will have play as the rocker arm doesnt have pressure on them. I do not suggest dropping them on the floor. You could have a collapsed lifter. To check that you have to remove the rocker arm, and push on the push rod, If its easily moved downward on the lifter that is your issue. The best way to check for bent push rods is to put them on glass and slowly roll them. Quote Link to comment Share on other sites More sharing options...
dieseltech320 Posted April 2, 2014 Report Share Posted April 2, 2014 That is why I said not sure about that method on or trucks, but that method has been very popular on larger engines where the pushrods are almost the size of our cams! Lol Quote Link to comment Share on other sites More sharing options...
tjblack03ss Posted April 2, 2014 Author Report Share Posted April 2, 2014 Ok it's the lifter been working on it all evening and cam looks fine but not like that matters since I was going to put a comp cam in this weekend Quote Link to comment Share on other sites More sharing options...
Blown 346 Posted April 2, 2014 Report Share Posted April 2, 2014 If it is the lifter and it feels collapsed I would replace all of them with a good set. Since the heads have to come off to get to the lifters, if you have some cylinder heads or extra money to have your stock ones gone thru now is the time. lol Quote Link to comment Share on other sites More sharing options...
tjblack03ss Posted April 2, 2014 Author Report Share Posted April 2, 2014 Like get the heads redone? Lol Quote Link to comment Share on other sites More sharing options...
Blown 346 Posted April 2, 2014 Report Share Posted April 2, 2014 If you can afford it. The heads will have to come off to replace the lifters. Quote Link to comment Share on other sites More sharing options...
tjblack03ss Posted April 3, 2014 Author Report Share Posted April 3, 2014 I probably won't since I'm getting the whole cam kit, efans, pulleys, gaskets so I'll just get another set of heads and send them off Quote Link to comment Share on other sites More sharing options...
sprayed99 Posted April 5, 2014 Report Share Posted April 5, 2014 (edited) Stick some of BTRs lifters in it and you wont have that issue. DO NOT USE LS7 lifters! Edit* Why is this in the How To Section? Edited April 5, 2014 by Sprayed99 (see edit history) Quote Link to comment Share on other sites More sharing options...
tjblack03ss Posted April 7, 2014 Author Report Share Posted April 7, 2014 I didn't know what section to post it to. Well I put the new cam springs pushrods and lifters in started the truck and still kind of hear a knocking now I have to drop the pan and see what's going on in the bottom end Quote Link to comment Share on other sites More sharing options...
Blown 346 Posted April 7, 2014 Report Share Posted April 7, 2014 Did you le the new lifters sit in oil for awhile to pump them up?? If not I bet thats what your hearing. Quote Link to comment Share on other sites More sharing options...
Fireman31 Posted April 7, 2014 Report Share Posted April 7, 2014 Edit* Why is this in the How To Section? Fixed that, topic moved to proper section* Quote Link to comment Share on other sites More sharing options...
tjblack03ss Posted April 7, 2014 Author Report Share Posted April 7, 2014 Well I covered them in oil before I put them in I didn't soak them and so what would I do about that? Quote Link to comment Share on other sites More sharing options...
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