Re: Comp Hyd Roller Fail
[Re: tubtar]
#2792014
07/02/20 07:58 PM
07/02/20 07:58 PM
|
Joined: Jun 2004
Posts: 926
birdtracker
super stock
|
super stock
Joined: Jun 2004
Posts: 926
|
That top roller doesn't look like it did too much rolling ! Ouch !! By the looks of it, it never rolled. All 3,000 miles. Birdtracker
|
|
|
Re: Comp Hyd Roller Fail
[Re: birdtracker]
#2792096
07/02/20 10:47 PM
07/02/20 10:47 PM
|
Joined: Jan 2003
Posts: 1,807 Mopar Country, Mi
ccdave
OP
The Ultimate
|
OP
The Ultimate
Joined: Jan 2003
Posts: 1,807
Mopar Country, Mi
|
That top roller doesn't look like it did too much rolling ! Ouch !! By the looks of it, it never rolled. All 3,000 miles. Birdtracker I built the engine 6 years ago. My customer said " it just started making a loud ticking noise " . That was last week. The engine ran great on the dyno and made just a tad over 500 horsepower. Bottom line, the tie bar rivets fatigued over time and BOOM!!! The tie bar currently resides on the bottom of the oil pan. The Johnson lifters do cost more however when this sh!t happens its worth paying more...
|
|
|
Re: Comp Hyd Roller Fail
[Re: ccdave]
#2792225
07/03/20 09:39 AM
07/03/20 09:39 AM
|
Joined: Oct 2007
Posts: 4,210 New York
polyspheric
master
|
master
Joined: Oct 2007
Posts: 4,210
New York
|
The tie bar slot length is always greater than the inter-tappet distance to allow for the tappets being on opposite ends of the lift scale. Any chance the button was bottomed out in the slot?
Boffin Emeritus
|
|
|
Re: Comp Hyd Roller Fail
[Re: ccdave]
#2792852
07/05/20 07:48 AM
07/05/20 07:48 AM
|
Joined: Sep 2004
Posts: 2,093 oberlin, Ohio
Rapid340
top fuel
|
top fuel
Joined: Sep 2004
Posts: 2,093
oberlin, Ohio
|
You may want to double check and verify spring pressures are HIGH enough. If pressures are low that can do far more damage than running more than you need.
1971 Factory Appearing Duster 340 11.000 @ 122 mph
|
|
|
Re: Comp Hyd Roller Fail
[Re: tubtar]
#2792857
07/05/20 08:29 AM
07/05/20 08:29 AM
|
Joined: Jan 2004
Posts: 1,468 N.Y.
sixpacksteve
pro stock
|
pro stock
Joined: Jan 2004
Posts: 1,468
N.Y.
|
my buddy just lost a 318, mild build with just hydraulic lifters, 30 miles after break in. 2 lifters went soft, wiped cam and then crank
Hell Hath No Fury Like Mine
|
|
|
Re: Comp Hyd Roller Fail
[Re: Rapid340]
#2802331
07/28/20 10:53 PM
07/28/20 10:53 PM
|
Joined: Jan 2003
Posts: 1,807 Mopar Country, Mi
ccdave
OP
The Ultimate
|
OP
The Ultimate
Joined: Jan 2003
Posts: 1,807
Mopar Country, Mi
|
You may want to double check and verify spring pressures are HIGH enough. If pressures are low that can do far more damage than running more than you need. Because when a customer hands you a check for 12K to build his engine you don't check spring pressure???? Thanks for the response but...... everything and then some was checked on this engine. Keep in mind this 440 had been running fine since 2014. A single tie bar out of 8 failed 3 months ago. We sent the bad roller pair to Comp, they said sorry and fixed the galled two lobes on the cam for free and assured us that they have corrected what may have been a quality issues with that production run on their roller lifters. All is good however, I now use Johnson lifters on all of my builds. They truly are the best hydraulic roller lifter money can buy. Check them out!!!
|
|
|
Re: Comp Hyd Roller Fail
[Re: Wailin D]
#2802438
07/29/20 10:50 AM
07/29/20 10:50 AM
|
Joined: Jan 2005
Posts: 4,449 Michigan
MarkZ
Worthy
|
Worthy
Joined: Jan 2005
Posts: 4,449
Michigan
|
All these threads on Comp hyd roller failures has me a little unsettled. I just had a 512 built in 2017 using a Comp kit with a few thousand street miles on it.
Did you notice the lifters being quieter after swapping to the Johnson lifters?
1987 Fifth Avenue - 512/518/D60
|
|
|
|
|