Hydraulic Lifter Weirdness
3 posters
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Hydraulic Lifter Weirdness
Several years ago I rebuilt a 460 for my '87 F-250 4x4 and it has always, from day one, had a noisey (sp) lifter. It took forever to quiet down (as quiet as it ever gets) during cam break-in. It always makes noise during cold starts and never gets quiet like the others.
I figured I must have gotten a bad lifter so a few years ago I changed them all. The noise is STILL THERE!
The engine consists of: D9TE block, .030 over Speed Pro forged pistons, stock truck rods and crank-balanced-, Comp Cams Extreme 4x4 camshaft .514-.524 lift and 218-226 dur. @.050 111 lobe sep., Big valve DOVE-C heads with Crane single springs, screw-in studs and guide plates, Harland Sharp roller rockers, Edelbrock Performer intake, Road Demon 625 carb, Hedman headers.
I do know I need different valve springs as I'm experiencing valve float around 5000-5200 rpm. I rarely rev it past about 4500 so I've been negligent and lazy in replacing the springs.
I have adjusted the valves numerous times to no avail. I'm at a loss here.
Have any of you run into anything like this? Any help or advice is much appreciated.
I figured I must have gotten a bad lifter so a few years ago I changed them all. The noise is STILL THERE!
The engine consists of: D9TE block, .030 over Speed Pro forged pistons, stock truck rods and crank-balanced-, Comp Cams Extreme 4x4 camshaft .514-.524 lift and 218-226 dur. @.050 111 lobe sep., Big valve DOVE-C heads with Crane single springs, screw-in studs and guide plates, Harland Sharp roller rockers, Edelbrock Performer intake, Road Demon 625 carb, Hedman headers.
I do know I need different valve springs as I'm experiencing valve float around 5000-5200 rpm. I rarely rev it past about 4500 so I've been negligent and lazy in replacing the springs.
I have adjusted the valves numerous times to no avail. I'm at a loss here.
Have any of you run into anything like this? Any help or advice is much appreciated.
1EFF100- Posts : 265
Join date : 2009-10-31
Age : 59
Location : Eureka, Ca
Re: Hydraulic Lifter Weirdness
I see where you said you have adjusted the rockers a few times are you putting some preload on them.The roller rocker will need preload on them to on a hdro cam.
69F100- BBF CONTRIBUTOR
- Posts : 5384
Join date : 2009-01-04
Age : 57
Location : Irwinville Ga.
Re: Hydraulic Lifter Weirdness
Yes sir, I am preloading. Zero lash then a quarter turn or so.
The thing is, it's the same lifter that's making the noise. The rest are all quiet. I was kinda wondering if it's the cam. Maybe one lobe got ground with a too agressive ramp or something?
The lifters I removed all looked great with no perceivable wear.
The thing is, it's the same lifter that's making the noise. The rest are all quiet. I was kinda wondering if it's the cam. Maybe one lobe got ground with a too agressive ramp or something?
![scratch](https://2img.net/i/fa/i/smiles/icon_scratch.png)
The lifters I removed all looked great with no perceivable wear.
1EFF100- Posts : 265
Join date : 2009-10-31
Age : 59
Location : Eureka, Ca
Re: Hydraulic Lifter Weirdness
i have had the same problem with hyd. cams from lunati if i remember right it was the pass. side
quick 52- Posts : 612
Join date : 2011-01-14
Age : 73
Location : leonard mi.
Re: Hydraulic Lifter Weirdness
quick 52 wrote:i have had the same problem with hyd. cams from lunati if i remember right it was the pass. side
Thank you quick52! I was hoping someone else had run into this. So it very well could be the cam.
The problem lifter is on the passenger side of mine too.
1EFF100- Posts : 265
Join date : 2009-10-31
Age : 59
Location : Eureka, Ca
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