Rocker Clatter?

acobraman · November 25th, 2008, 09:13 PM

I have what I would have to call "rocker clatter" over 2200 rpms til at least 4000 rpms. Definitely loud enough to hear over the vortec blower. Hear it when I put in the clutch and the motor comes down, hear it cruising at 80 on the hiway. The only time I don't hear it is below 2000 rpms. Recently rebuilt again motor, supposed to be all fresh new parts through out. Any body have any ideas what it could be and how to make it go away?

SWEET2KSTANG · November 25th, 2008, 09:21 PM

lash adjusters (lifters), or something in the bottom end.

acobraman · November 25th, 2008, 09:26 PM

can they be adjusted? Definitely sounds like it's coming from top of engine.

SWEET2KSTANG · November 25th, 2008, 09:35 PM

no they can not. we had that issue with doc's mach after rebuild. we had to go in and change them.

futureMACH1racer · November 25th, 2008, 09:36 PM

I'd go to the shop that rebuilt the engine and have them warranty it.

acobraman · November 25th, 2008, 09:37 PM

Could they be the wrong ones? Rocker or the lifters? They put wrong pistons in the first time.

SWEET2KSTANG · November 25th, 2008, 09:39 PM

no, the issue we ran into was they didnt pump back up all the way. they are suppose to be bled out and reinstalled, they suppose to pump back up whan they get oil pressure. his didnt for some reason, after changing them, the valvetrain clatter went away.

acobraman · November 25th, 2008, 09:40 PM

What was changed?

SWEET2KSTANG · November 25th, 2008, 09:40 PM

the lash adjuster (lifters)

acobraman · November 25th, 2008, 09:41 PM

Before the piston came apart, they were back into the top end 3 or 4 times chasing noises. Assumed it was the piston that came apart.

SWEET2KSTANG · November 25th, 2008, 09:46 PM

that sucks. what all is done on the motor now?

acobraman · November 25th, 2008, 09:48 PM

complete rebuild .0030 over, mahle pistons, manley rods

SWEET2KSTANG · November 25th, 2008, 09:51 PM

thats cool. any headwork or cams?

acobraman · November 25th, 2008, 09:53 PM

valve job was all.

SWEET2KSTANG · November 25th, 2008, 09:54 PM

thats cool. i would look into that chatter a little more to make sure everything is good before i go out and take it out for a nice thrashing.

acobraman · November 25th, 2008, 10:00 PM

I haven't run it hard, that noise just won't go away, think I'll take it back again tomorrow. Just brought it home today after a year. Thanks for the advice SWEET2KSTANG

futureMACH1racer · November 25th, 2008, 10:07 PM

best of luck to you man.

SWEET2KSTANG · November 25th, 2008, 11:03 PM

no problem. i hope you get it figured out.

mustang95 5.0 · November 25th, 2008, 11:09 PM

Originally Posted by SWEET2KSTANG

lash adjusters (lifters), or something in the bottom end.

+1 on the lifters i have the same problem with my ride. I have to check mine out but sounds to me like you have the same problem.

Mustang RacR94 · November 26th, 2008, 12:14 AM

there was a loud tapping noise coming from the motor of this one guys cobra, turned out to be the guides on the timing chain wore down or something and the chain was hitting stuff

November 25th, 2008, 09:13 PM	#1
acobraman Regular 96 Cobra Vert. , 97 Cobra 12.55@111.33 Join Date: Sep 2007 Location: Texas Posts: 97 iTrader: 0 reviews	Rocker Clatter? I have what I would have to call "rocker clatter" over 2200 rpms til at least 4000 rpms. Definitely loud enough to hear over the vortec blower. Hear it when I put in the clutch and the motor comes down, hear it cruising at 80 on the hiway. The only time I don't hear it is below 2000 rpms. Recently rebuilt again motor, supposed to be all fresh new parts through out. Any body have any ideas what it could be and how to make it go away? __________________

November 25th, 2008, 09:21 PM	#2
SWEET2KSTANG mm's nitrous mod 2000 mustang gt 11.79@115.83 (old set up) Join Date: Oct 2006 Location: N.W. AR Posts: 12,540 iTrader: 8 reviews	lash adjusters (lifters), or something in the bottom end. __________________ project warhorse under construction wagon burner under construction as well (04 lightning) being built by MP2 Performance

November 25th, 2008, 09:26 PM	#3
acobraman Regular 96 Cobra Vert. , 97 Cobra 12.55@111.33 Join Date: Sep 2007 Location: Texas Posts: 97 iTrader: 0 reviews	can they be adjusted? Definitely sounds like it's coming from top of engine. __________________

November 25th, 2008, 09:35 PM	#4
SWEET2KSTANG mm's nitrous mod 2000 mustang gt 11.79@115.83 (old set up) Join Date: Oct 2006 Location: N.W. AR Posts: 12,540 iTrader: 8 reviews	no they can not. we had that issue with doc's mach after rebuild. we had to go in and change them. __________________ project warhorse under construction wagon burner under construction as well (04 lightning) being built by MP2 Performance

November 25th, 2008, 09:36 PM	#5
futureMACH1racer I.D.G.A.F. 2009 John Deere 9670 Join Date: Sep 2007 Location: United States of America Posts: 11,347 iTrader: 0 reviews	I'd go to the shop that rebuilt the engine and have them warranty it. __________________ RIP Travis Bilings 5/6/1982-7/5/2011 Be polite. Be professional. But have a plan to kill everyone you meet.

November 25th, 2008, 09:37 PM	#6
acobraman Regular 96 Cobra Vert. , 97 Cobra 12.55@111.33 Join Date: Sep 2007 Location: Texas Posts: 97 iTrader: 0 reviews	Could they be the wrong ones? Rocker or the lifters? They put wrong pistons in the first time. __________________

November 25th, 2008, 09:39 PM	#7
SWEET2KSTANG mm's nitrous mod 2000 mustang gt 11.79@115.83 (old set up) Join Date: Oct 2006 Location: N.W. AR Posts: 12,540 iTrader: 8 reviews	no, the issue we ran into was they didnt pump back up all the way. they are suppose to be bled out and reinstalled, they suppose to pump back up whan they get oil pressure. his didnt for some reason, after changing them, the valvetrain clatter went away. __________________ project warhorse under construction wagon burner under construction as well (04 lightning) being built by MP2 Performance

November 25th, 2008, 09:40 PM	#8
acobraman Regular 96 Cobra Vert. , 97 Cobra 12.55@111.33 Join Date: Sep 2007 Location: Texas Posts: 97 iTrader: 0 reviews	What was changed? __________________

November 25th, 2008, 09:40 PM	#9
SWEET2KSTANG mm's nitrous mod 2000 mustang gt 11.79@115.83 (old set up) Join Date: Oct 2006 Location: N.W. AR Posts: 12,540 iTrader: 8 reviews	the lash adjuster (lifters) __________________ project warhorse under construction wagon burner under construction as well (04 lightning) being built by MP2 Performance

November 25th, 2008, 09:41 PM	#10
acobraman Regular 96 Cobra Vert. , 97 Cobra 12.55@111.33 Join Date: Sep 2007 Location: Texas Posts: 97 iTrader: 0 reviews	Before the piston came apart, they were back into the top end 3 or 4 times chasing noises. Assumed it was the piston that came apart. __________________

November 25th, 2008, 09:46 PM	#11
SWEET2KSTANG mm's nitrous mod 2000 mustang gt 11.79@115.83 (old set up) Join Date: Oct 2006 Location: N.W. AR Posts: 12,540 iTrader: 8 reviews	that sucks. what all is done on the motor now? __________________ project warhorse under construction wagon burner under construction as well (04 lightning) being built by MP2 Performance

November 25th, 2008, 09:48 PM	#12
acobraman Regular 96 Cobra Vert. , 97 Cobra 12.55@111.33 Join Date: Sep 2007 Location: Texas Posts: 97 iTrader: 0 reviews	complete rebuild .0030 over, mahle pistons, manley rods __________________

November 25th, 2008, 09:51 PM	#13
SWEET2KSTANG mm's nitrous mod 2000 mustang gt 11.79@115.83 (old set up) Join Date: Oct 2006 Location: N.W. AR Posts: 12,540 iTrader: 8 reviews	thats cool. any headwork or cams? __________________ project warhorse under construction wagon burner under construction as well (04 lightning) being built by MP2 Performance

November 25th, 2008, 09:53 PM	#14
acobraman Regular 96 Cobra Vert. , 97 Cobra 12.55@111.33 Join Date: Sep 2007 Location: Texas Posts: 97 iTrader: 0 reviews	valve job was all. __________________

November 25th, 2008, 09:54 PM	#15
SWEET2KSTANG mm's nitrous mod 2000 mustang gt 11.79@115.83 (old set up) Join Date: Oct 2006 Location: N.W. AR Posts: 12,540 iTrader: 8 reviews	thats cool. i would look into that chatter a little more to make sure everything is good before i go out and take it out for a nice thrashing. __________________ project warhorse under construction wagon burner under construction as well (04 lightning) being built by MP2 Performance

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November 25th, 2008, 10:00 PM	#16
acobraman Regular 96 Cobra Vert. , 97 Cobra 12.55@111.33 Join Date: Sep 2007 Location: Texas Posts: 97 iTrader: 0 reviews	I haven't run it hard, that noise just won't go away, think I'll take it back again tomorrow. Just brought it home today after a year. Thanks for the advice SWEET2KSTANG __________________

November 25th, 2008, 10:07 PM	#17
futureMACH1racer I.D.G.A.F. 2009 John Deere 9670 Join Date: Sep 2007 Location: United States of America Posts: 11,347 iTrader: 0 reviews	best of luck to you man. __________________ RIP Travis Bilings 5/6/1982-7/5/2011 Be polite. Be professional. But have a plan to kill everyone you meet.

November 25th, 2008, 11:03 PM	#18
SWEET2KSTANG mm's nitrous mod 2000 mustang gt 11.79@115.83 (old set up) Join Date: Oct 2006 Location: N.W. AR Posts: 12,540 iTrader: 8 reviews	no problem. i hope you get it figured out. __________________ project warhorse under construction wagon burner under construction as well (04 lightning) being built by MP2 Performance

November 26th, 2008, 12:14 AM	#20
Mustang RacR94 MM Fanatic 99 cobra N/A Join Date: Dec 2006 Location: Fayetteville NC Posts: 3,169 iTrader: 0 reviews	there was a loud tapping noise coming from the motor of this one guys cobra, turned out to be the guides on the timing chain wore down or something and the chain was hitting stuff __________________ 99 Cobra 03 Cobra motor AFCO H/E Pulley JLT CAI BBK L/T off road H/steeda catback SCT MAF Tune 03 cobra pumps HVGC

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