I have a set of crower lifters and I noticed that the valve train is getting louder and louder. I pulled the valve covers off and i noticed on a few i could pick the rocker off the top of the valve about a sixteenth of an inch. If you feel the pushrod, it still has pressure on it and, but you can push the back of the rocker down. I ran teh car about 24 hours ago. Will the lifters bleed off in that time or is there a problem here. It runs fine so I don't think the cam is going flat. What is a good sign that you have cam problems.
If you can collapse the lifter by hand after only one day then your lifters are faulty. It should take weeks not days for them to bleed down to that point. The issue of 1/16" of lash on a hyd cam is also a problem, you shouldn't have that kind of movement, it may also be a lifter issue.
Well i taked to crower today and i told them what was going on and that all of them were bleeding down. Their reply is that is normal. They also in fact said they should bleed out very fastly. I don't know if this is a different style lifer or not but, whats it going to hurt if they bleed out. It only takes a few seconds to pump up. I would think you are saving the cam, because it won't have the spring pressure at start-up.
Have you checked the torque on the rocker arm shaft bolts? Happened to me last summer, one was loose somehow after 3 years of being just fine...made a heck of a racket and drove me nuts for almost two weeks.
Well, I just went through lifter hell and I can tell you that the set I have now you can not collapse in any position, and I haven't started the engine in over a week, now the lifters that stop with a valve in the open position will bleed down a bit but you can't collapse them any farther by hand. If the day after you've run the engine you can go out to any rocker an collapse the lifter down into it's bore then you have a bad/dirty lifter (unless they're some special variable proton gravity 700hp lifter:grin), just be sure Crower isn't giving you the company line.
does anyone know if the lifters bleed out overnight, but after you start it and shut it off they are all tight. Will this hurt anything. As long as they pump up at startup you should be fine right???
If you don't mind the noise at start up, then no, it probably won't hurt a thing. What you want to keep in mind though is that if these lifters are weak and bleeding by, then you may not be getting your cams full potential. I'm not going to recommend a brand of lifter, it's like recommending a cam model, you'll get a thousand different opinions. If you want the best advice call one of the builders (not vendors) and get their advise. Good Luck.:TU:
