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Discussing motor knocking in the 5.0 Mustangs Forum. the motor is knocking and its coming from the valvetrain is there any way to ... Modded Mustangs is the premier Ford Mustang Forum on the internet. We discuss all aspects of the Ford Mustang on the forum. Registered Users do not see the above ads. Please Register - It's Free! |
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#1 |
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Regular
1987 mustang GT
Join Date: Oct 2008
Location: tx
Posts: 257
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motor knocking
the motor is knocking and its coming from the valvetrain is there any way to tell whats making it knock for sure. i dont wanna pull apart the motor right now just to find out then order the parts. i rather order then pull apart. im pretty sure its a lifter but my be a push rod.
if its a lifter what kind of lifters should i buy
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5.0, steeda short shifter, edelbrock intake upper and lower, bbk cold air intake, 3.73, b303 cam, 65 mm throttle body, 65mm mass air, 24 lbs injectors, h pipe, dual flows dump and more to come
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#2 |
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Hardcore Enthusiast
Join Date: Aug 2008
Location: Phoenix,AZ
Posts: 2,454
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How are you going to fugure it out with out pulling it apart....You going to call ms Cleo?
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“No track close to me, but with my old stock head, E cam setup N/A I was hitting 14 flat at 105 on cheap street tires using a G-tech” "I want some nice super high flow CAST IRON heads. " PeteAndersonRacing.com |
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#3 |
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Regular
1997 Mustang GT
335rwhp/370rwtq
Join Date: Jul 2008
Location: Tennessee
Posts: 339
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i doubt knocking would be a lifter, if it were a lifter it would be in the ticking section IMO
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#4 |
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Hardcore Enthusiast
2000 gt
Join Date: Feb 2009
Location: La grange, KY
Posts: 1,325
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some people confuse a knock for a tick. i doubt it's rod knock if it's coming from up top. if it's a "tick" then it's likely a lifter or a header leak.
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Procharged 2000 5 Speed BAB GT, 7.3 lbs, 368 hp, 406 rwtq.HARDCORE CREW |
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#5 |
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Regular
1987 mustang GT
Join Date: Oct 2008
Location: tx
Posts: 257
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well thats y i was asking idk sometimes theres a trick i may not know or something
i had a header leak before but this is diff
__________________
5.0, steeda short shifter, edelbrock intake upper and lower, bbk cold air intake, 3.73, b303 cam, 65 mm throttle body, 65mm mass air, 24 lbs injectors, h pipe, dual flows dump and more to come
Last edited by 87gtmustang : June 30th, 2009 at 06:24 PM. |
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#6 |
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Regular
1997 Mustang GT
335rwhp/370rwtq
Join Date: Jul 2008
Location: Tennessee
Posts: 339
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+1 knocking would be the sound pistons/rods make
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#7 |
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Hardcore Enthusiast
2000 gt
Join Date: Feb 2009
Location: La grange, KY
Posts: 1,325
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a knock will be a deeper sound down in the block. listen from the bottom and see if you can tell. it's hard for me to say over the internet. any way you can post a good vid of it???
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Procharged 2000 5 Speed BAB GT, 7.3 lbs, 368 hp, 406 rwtq.HARDCORE CREW |
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#8 |
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Hardcore Enthusiast
2002 Mustang GT
14.20@100.62
Join Date: Jun 2009
Location: Waco, Texas
Posts: 1,036
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You mighta spun a bearing... i'm pretty sure thats what this is.
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#9 |
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Regular
1987 mustang GT
Join Date: Oct 2008
Location: tx
Posts: 257
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a little throtle
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5.0, steeda short shifter, edelbrock intake upper and lower, bbk cold air intake, 3.73, b303 cam, 65 mm throttle body, 65mm mass air, 24 lbs injectors, h pipe, dual flows dump and more to come
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#10 |
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Hardcore Enthusiast
2002 Mustang GT
14.20@100.62
Join Date: Jun 2009
Location: Waco, Texas
Posts: 1,036
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Yeah, my friends car spun a bearing and sounded just like that.
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#11 |
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Enthusiast
1994 Ford Mustang GT
Join Date: Sep 2006
Location: Shawano, WI
Posts: 573
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hmm sounds like a tick/knock almost lol
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#12 |
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MM Fanatic
1993 5.ohhhh
14.47 at 96 mph
Join Date: Apr 2006
Location: Gatorland
Posts: 4,707
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Piston slap, got the volume down the women is watching tyra banks so I can't hear to well.
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exploder top end with 12 psi of v-tech
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#13 |
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Hardcore Enthusiast
Join Date: Nov 2006
Location: Orlando, Fl
Posts: 1,742
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yeah, um def in the valve train, either collapsed lifter, bent pushrod or broke a rocker off the pedestal. just pull the valve covers, no big deal and the prob should be stairing you right in the face
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#14 |
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Regular
1987 mustang GT
Join Date: Oct 2008
Location: tx
Posts: 257
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ok i pulled the intake and the valve covers so far the driver side lifters seem to be ok i havnt checked the passanger side yet got to lake and i couldnt get a bolt off so tomorrow after work ill check the passanger side and if thats good to then ill check the rods
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5.0, steeda short shifter, edelbrock intake upper and lower, bbk cold air intake, 3.73, b303 cam, 65 mm throttle body, 65mm mass air, 24 lbs injectors, h pipe, dual flows dump and more to come
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#15 |
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MM Fanatic
1993 5.ohhhh
14.47 at 96 mph
Join Date: Apr 2006
Location: Gatorland
Posts: 4,707
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Huh, huh? There both in the valley of the motor, how could u see one side and not the other?
I'm guessing you mean you didn't take the rockers off on the passenger side to pull the pushrods off, so you can take out the lifters?
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exploder top end with 12 psi of v-tech
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#16 |
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Hardcore Enthusiast
Join Date: Aug 2008
Location: Phoenix,AZ
Posts: 2,454
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How you checkin the rods? Pullin the motor all apart?
__________________
“No track close to me, but with my old stock head, E cam setup N/A I was hitting 14 flat at 105 on cheap street tires using a G-tech” "I want some nice super high flow CAST IRON heads. " PeteAndersonRacing.com |
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#17 |
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Regular
1987 mustang GT
Join Date: Oct 2008
Location: tx
Posts: 257
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kind of but not completely
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5.0, steeda short shifter, edelbrock intake upper and lower, bbk cold air intake, 3.73, b303 cam, 65 mm throttle body, 65mm mass air, 24 lbs injectors, h pipe, dual flows dump and more to come
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#18 |
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Hardcore Enthusiast
Join Date: Aug 2008
Location: Phoenix,AZ
Posts: 2,454
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So how....pullin rod bearings?
__________________
“No track close to me, but with my old stock head, E cam setup N/A I was hitting 14 flat at 105 on cheap street tires using a G-tech” "I want some nice super high flow CAST IRON heads. " PeteAndersonRacing.com |
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#19 |
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Regular
1987 mustang GT
Join Date: Oct 2008
Location: tx
Posts: 257
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how do you pull the fuel rails
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5.0, steeda short shifter, edelbrock intake upper and lower, bbk cold air intake, 3.73, b303 cam, 65 mm throttle body, 65mm mass air, 24 lbs injectors, h pipe, dual flows dump and more to come
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#20 |
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Zippee is my step sister.
1990 Mustang LX
9.36@143 mph
Join Date: Jan 2006
Location: Fond du Lac, Wisconsin
Posts: 10,356
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It sounds like a valvetrain noise like a loose rocker arm, broken valve spring or bad lifter BUT that doesn't mean it is in the valvetrain. I destroyed a rod bearing once that sounded like a loose rocker. I swore the noise was in the valvetrain, it sounded like it was under the valve cover. I was even going to make another pass with it but decided to go the safe route. If you don't find anything out of place in the valvetrain, you are going to have to pull the engine out and pull it apart.
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