Hmm what gives comp hydralic roller lifters not pumping up?
#2306861
05/18/17 05:12 PM
05/18/17 05:12 PM
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Joined: Jul 2009
Posts: 237 Redding,CA USA
440charger500
OP
enthusiast
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OP
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Redding,CA USA
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Ok so pretty fresh 360 been running great & making good power with not an issue. Fired it up last week & lots of lifter noise on both sides where it was pretty quiet before. Adjustable rockers that are set correctly ran thru them all again last night & its getting oil to the shafts. Kinda scratching our heads trying to figure this out & wondering if a cam bearing could have possibly spun causing an oiling issue or possibly something else??? What do you guys think?
Last edited by 440charger500; 05/18/17 09:41 PM.
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Re: Hmm what gives comp hydralic roller lifters not pumpig up?
[Re: 440charger500]
#2306868
05/18/17 05:23 PM
05/18/17 05:23 PM
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Joined: Jan 2003
Posts: 14,531 So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
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Posts: 14,531
So. Burlington, Vt.
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So....... They were fine, and all of a sudden none of them pump up?
I'm thinking it's something else.
Did the motor get run into pretty hard valve float at all?
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: Hmm what gives comp hydralic roller lifters not pumpig up?
[Re: 440charger500]
#2307039
05/18/17 10:17 PM
05/18/17 10:17 PM
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Joined: Aug 2003
Posts: 43,719 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,719
Bend,OR USA
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No valve float tach & shift light is set to 6,000 rpm. Im sure thats way below the capability of the valve springs & cam Never ASS U ME anything when it comes to HI Po motors and Hi Po parts There is a reason for this problem, let us know what you find
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Hmm what gives comp hydralic roller lifters not pumpig up?
[Re: 440charger500]
#2307294
05/19/17 12:16 PM
05/19/17 12:16 PM
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Joined: Jan 2003
Posts: 14,531 So. Burlington, Vt.
fast68plymouth
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I Live Here
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So. Burlington, Vt.
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I doubt all or most of the lifters failed just sitting there.
What oil is in the motor?
If you have "thicker" oil in it, and the spring pressure has bled the lifters down, then they may be having a hard time getting the air bled back out of them with thick cold oil in the motor.
Also, if you have the pro magnum rockers, and not a lot of preload on the lifters, I've seen where pushrods can fall out on start-up after the lifters have bled down. The pushrod cup on the rocker isn't very deep, and if the lifter is bottomed out and doesn't recover quick enough on start-up...... The pushrods can fall out of position.
I have not seen or heard of this happening with rockers that use ball and cup pushrods.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: Hmm what gives comp hydralic roller lifters not pumping up?
[Re: 440charger500]
#2307935
05/20/17 01:53 PM
05/20/17 01:53 PM
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Joined: Jan 2003
Posts: 14,531 So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
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So. Burlington, Vt.
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They're going to bleed off after shut down....... So a little clatter after start up may be a fairly common occurance for you.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: Hmm what gives comp hydralic roller lifters not pumping up?
[Re: 440charger500]
#2308292
05/21/17 01:23 AM
05/21/17 01:23 AM
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Joined: Feb 2011
Posts: 4,302 Nebraska
72Swinger
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master
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Posts: 4,302
Nebraska
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Comp lifters don't have a great track record imo.
Mopar to the bone!!!
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Re: Hmm what gives comp hydralic roller lifters not pumping up?
[Re: fast68plymouth]
#2308565
05/21/17 03:57 PM
05/21/17 03:57 PM
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Joined: Jul 2009
Posts: 237 Redding,CA USA
440charger500
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Redding,CA USA
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They're going to bleed off after shut down....... So a little clatter after start up may be a fairly common occurance for you. Took the car to the strip last night & ran some passes went 12.50's @ 109. I noticed in between passes letting it cool down cuz it was HOT 95 out, upon start up lifters clattered then calmed down after 15 seconds. Wondering if i should look into some different roller lifters as preventative maintenance Hmm
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Re: Hmm what gives comp hydralic roller lifters not pumping up?
[Re: 440charger500]
#2308639
05/21/17 07:01 PM
05/21/17 07:01 PM
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Joined: Dec 2013
Posts: 4,804 Wichita
GY3
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master
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Wichita
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They're going to bleed off after shut down....... So a little clatter after start up may be a fairly common occurance for you. Took the car to the strip last night & ran some passes went 12.50's @ 109. I noticed in between passes letting it cool down cuz it was HOT 95 out, upon start up lifters clattered then calmed down after 15 seconds. Wondering if i should look into some different roller lifters as preventative maintenance Hmm You couldn't GIVE me a set of Comp. Hydraulic roller lifters!
'63 Dodge 330
11.19 @ 121 mph Pump gas, n/a, through the mufflers on street tires with 3.54's. 3,600 lbs.
9.92 @ 135mph with a 350 shot of nitrous and 93 octane pump. 1.43 60 ft. 3,750 lbs.
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