Re-torquing roller rockers need help!!!!

b-on-b 5.0 · February 7th, 2009, 08:23 PM

I have a 1993 cobra longblock in my car and it came with 1.7 roller rockers from comp cams i just now got 4000 or so miles on the motor and one of the rockers on the driverside seems to knock louder than the rest at idle so i am guna re-torque everything back down but do not know the proper procedure for doing this so if anyone can help me i would greatly appreciate it.

86er · February 7th, 2009, 08:28 PM

nothing special just 18ftlbs and thats it

b-on-b 5.0 · February 7th, 2009, 08:51 PM

so i dont need to make sure any of the valves on the motor are closed when i tighten each one cuz i herd u have to make sure that it is on the flatest part of the cam when i tighten them??????

flamestang · February 7th, 2009, 09:15 PM

that would be the logical way to do it

ryans88gt · February 7th, 2009, 09:27 PM

If it is making noise, it isn't a pedestal mount rocker issue, perhaps a collapsed lifter or flat spotted roller.

b-on-b 5.0 · February 7th, 2009, 09:35 PM

ok you dont think it is that bad of a problem then? becuz one of my buddies builds engines for street/strip cars and said it might have just lossened up from the facotry i am just guna re-torque them anyways to be safe...idk this guy knows his shit and the motors he build are lagit.....his car is in the low ten's at about 6,000 feet so idk i would just guess it was that i mean everything on the motor is new u really think there is a collapsed lifter or flat spot?

ryans88gt · February 7th, 2009, 09:52 PM

If an adjustable valve train rocker backs off it will make noise. If a pedestal mount rocker backs off enough to make noise the bolt will be completely loose and the rocker would fall off or break the bolt. Pedestal rockers do not adjust, they are either bolted down or not.

Possible sources of ticking noise
1) leaking header gasket
2) sticking injector
3) worn out roller on the lifter or rocker
4) misadjusted valve train (yours is nonadjustable, so if it came out of adjustment there is a underlying issue)
5) sticking valve guide
6) burned valve
7) collapsed lifter
8) bent pushrod

b-on-b 5.0 · February 7th, 2009, 09:59 PM

okm thanx i appreciate it yea i just talked to him and he said that its a possibilty that i have an exhaust leak but he said the sound is too minor to be a collapsed lifter or a flat spot i mean it sounds like a lifter to me but am guna check my header bolts and i am replacing the injectors so that is taken care of but maybe i will check for a leak first before tearing eveything apart

TKOTLARZ · February 7th, 2009, 10:31 PM

definitely check the exhaust..if its not a header..check the back of the head to cause i had this little plug back out, causing a leak...

86er · February 8th, 2009, 02:54 AM

Originally Posted by b-on-b 5.0

so i dont need to make sure any of the valves on the motor are closed when i tighten each one cuz i herd u have to make sure that it is on the flatest part of the cam when i tighten them??????

info isnt needed now, but now, set torque wrench to 18ft lbs and turn till it clicks, end of story

93mustank · February 8th, 2009, 01:17 PM

Pedestals suck.... You probably have the wrong rocker arm geometry

February 7th, 2009, 08:23 PM	#1
b-on-b 5.0 Regular 1993 Mustang 5.0 LX 11.45@122.34 Join Date: Jul 2008 Location: Lakewood, CO Posts: 344 iTrader: 0 reviews	Re-torquing roller rockers need help!!!! I have a 1993 cobra longblock in my car and it came with 1.7 roller rockers from comp cams i just now got 4000 or so miles on the motor and one of the rockers on the driverside seems to knock louder than the rest at idle so i am guna re-torque everything back down but do not know the proper procedure for doing this so if anyone can help me i would greatly appreciate it.

February 7th, 2009, 08:28 PM	#2
86er I Post Entirely Way Too Much Join Date: Nov 2006 Location: Memphis, TN Posts: 7,626 iTrader: 0 reviews	nothing special just 18ftlbs and thats it __________________ Just a truck 5.4 3v: 264hp 317ft lbs rock stock The "search" button, its not just for porn piecing together the next project faster than your first sexual experience

February 7th, 2009, 09:27 PM	#5
ryans88gt MM Fanatic Join Date: May 2007 Location: Bloomington, IL Posts: 4,737 iTrader: 0 reviews	If it is making noise, it isn't a pedestal mount rocker issue, perhaps a collapsed lifter or flat spotted roller. __________________ 88 GT CHI headed 351w 10.8 @ 125 - still figuring it out. 03 Cobra 2.3 whipple 10.7 @ 129 - sold it 04 Mach 1 12.7 @ 109 mostly stock - sold it 89 LX procharged 302 515 hp 497 ftlbs 10.7 @130 mph - sold it

February 7th, 2009, 09:52 PM	#7
ryans88gt MM Fanatic Join Date: May 2007 Location: Bloomington, IL Posts: 4,737 iTrader: 0 reviews	If an adjustable valve train rocker backs off it will make noise. If a pedestal mount rocker backs off enough to make noise the bolt will be completely loose and the rocker would fall off or break the bolt. Pedestal rockers do not adjust, they are either bolted down or not. Possible sources of ticking noise 1) leaking header gasket 2) sticking injector 3) worn out roller on the lifter or rocker 4) misadjusted valve train (yours is nonadjustable, so if it came out of adjustment there is a underlying issue) 5) sticking valve guide 6) burned valve 7) collapsed lifter 8) bent pushrod __________________ 88 GT CHI headed 351w 10.8 @ 125 - still figuring it out. 03 Cobra 2.3 whipple 10.7 @ 129 - sold it 04 Mach 1 12.7 @ 109 mostly stock - sold it 89 LX procharged 302 515 hp 497 ftlbs 10.7 @130 mph - sold it

February 7th, 2009, 10:31 PM	#9
TKOTLARZ Hardcore Enthusiast 1994 GT Join Date: Nov 2007 Location: lake worth, Florida Posts: 1,002 iTrader: 0 reviews	definitely check the exhaust..if its not a header..check the back of the head to cause i had this little plug back out, causing a leak... __________________ Cohagan Engineering, Inc.

February 7th, 2009, 08:51 PM	#3
b-on-b 5.0 Regular 1993 Mustang 5.0 LX 11.45@122.34 Join Date: Jul 2008 Location: Lakewood, CO Posts: 344 iTrader: 0 reviews	so i dont need to make sure any of the valves on the motor are closed when i tighten each one cuz i herd u have to make sure that it is on the flatest part of the cam when i tighten them??????

February 7th, 2009, 09:15 PM	#4
flamestang Regular Join Date: Apr 2007 Posts: 338 iTrader: 0 reviews	that would be the logical way to do it

February 7th, 2009, 09:35 PM	#6
b-on-b 5.0 Regular 1993 Mustang 5.0 LX 11.45@122.34 Join Date: Jul 2008 Location: Lakewood, CO Posts: 344 iTrader: 0 reviews	ok you dont think it is that bad of a problem then? becuz one of my buddies builds engines for street/strip cars and said it might have just lossened up from the facotry i am just guna re-torque them anyways to be safe...idk this guy knows his shit and the motors he build are lagit.....his car is in the low ten's at about 6,000 feet so idk i would just guess it was that i mean everything on the motor is new u really think there is a collapsed lifter or flat spot?

February 7th, 2009, 09:59 PM	#8
b-on-b 5.0 Regular 1993 Mustang 5.0 LX 11.45@122.34 Join Date: Jul 2008 Location: Lakewood, CO Posts: 344 iTrader: 0 reviews	okm thanx i appreciate it yea i just talked to him and he said that its a possibilty that i have an exhaust leak but he said the sound is too minor to be a collapsed lifter or a flat spot i mean it sounds like a lifter to me but am guna check my header bolts and i am replacing the injectors so that is taken care of but maybe i will check for a leak first before tearing eveything apart

February 8th, 2009, 01:17 PM	#11
93mustank Banned Join Date: Aug 2008 Location: Phoenix,AZ Posts: 3,014 iTrader: 1 reviews	Pedestals suck.... You probably have the wrong rocker arm geometry __________________ PeteAndersonRacing.com

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