motor knocking

87gtmustang · June 30th, 2009, 06:04 PM

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

93mustank · June 30th, 2009, 06:12 PM

How are you going to fugure it out with out pulling it apart....You going to call ms Cleo?

ModularSteed · June 30th, 2009, 06:14 PM

i doubt knocking would be a lifter, if it were a lifter it would be in the ticking section IMO

mustanginky · June 30th, 2009, 06:20 PM

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.

87gtmustang · June 30th, 2009, 06:21 PM

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

ModularSteed · June 30th, 2009, 06:22 PM

+1 knocking would be the sound pistons/rods make

mustanginky · June 30th, 2009, 06:23 PM

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???

BadBlackGT · June 30th, 2009, 06:25 PM

You mighta spun a bearing... i'm pretty sure thats what this is.

87gtmustang · June 30th, 2009, 07:10 PM

[IMG]http://i94.photobucket.com/albums/l112/paintd...

a little throtle

[IMG]http://i94.photobucket.com/albums/l112/paintd...

BadBlackGT · June 30th, 2009, 07:45 PM

Yeah, my friends car spun a bearing and sounded just like that.

Lind · June 30th, 2009, 08:47 PM

hmm sounds like a tick/knock almost lol

flattusmaximus78 · June 30th, 2009, 11:33 PM

Piston slap, got the volume down the women is watching tyra banks so I can't hear to well.

86er · July 1st, 2009, 12:10 AM

Originally Posted by BadBlackGT

Yeah, my friends car spun a bearing and sounded just like that.

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

87gtmustang · July 2nd, 2009, 11:34 PM

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

flattusmaximus78 · July 3rd, 2009, 12:35 PM

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?

93mustank · July 3rd, 2009, 04:21 PM

How you checkin the rods? Pullin the motor all apart?

87gtmustang · July 3rd, 2009, 04:29 PM

kind of but not completely

93mustank · July 3rd, 2009, 04:30 PM

So how....pullin rod bearings?

87gtmustang · July 3rd, 2009, 11:17 PM

how do you pull the fuel rails

1slo5.0 · July 3rd, 2009, 11:44 PM

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.

June 30th, 2009, 06:04 PM	#1
87gtmustang Regular 1987 mustang GT Join Date: Oct 2008 Location: tx Posts: 257	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 __________________ 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

June 30th, 2009, 06:12 PM	#2
93mustank Hardcore Enthusiast Join Date: Aug 2008 Location: Phoenix,AZ Posts: 2,454	How are you going to fugure it out with out pulling it apart....You going to call ms Cleo? __________________ “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

June 30th, 2009, 06:20 PM	#4
mustanginky Hardcore Enthusiast 2000 gt Join Date: Feb 2009 Location: La grange, KY Posts: 1,325	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. __________________ Procharged 2000 5 Speed BAB GT, 7.3 lbs, 368 hp, 406 rwtq. HARDCORE CREW

June 30th, 2009, 06:21 PM	#5
87gtmustang Regular 1987 mustang GT Join Date: Oct 2008 Location: tx Posts: 257	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.

June 30th, 2009, 06:23 PM	#7
mustanginky Hardcore Enthusiast 2000 gt Join Date: Feb 2009 Location: La grange, KY Posts: 1,325	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??? __________________ Procharged 2000 5 Speed BAB GT, 7.3 lbs, 368 hp, 406 rwtq. HARDCORE CREW

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June 30th, 2009, 08:47 PM	#11
Lind Enthusiast 1994 Ford Mustang GT Join Date: Sep 2006 Location: Shawano, WI Posts: 573	hmm sounds like a tick/knock almost lol __________________ My Daily Driver

June 30th, 2009, 11:33 PM	#12
flattusmaximus78 MM Fanatic 1993 5.ohhhh 14.47 at 96 mph Join Date: Apr 2006 Location: Gatorland Posts: 4,707	Piston slap, got the volume down the women is watching tyra banks so I can't hear to well. __________________ exploder top end with 12 psi of v-tech

July 2nd, 2009, 11:34 PM	#14
87gtmustang Regular 1987 mustang GT Join Date: Oct 2008 Location: tx Posts: 257	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 __________________ 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

July 3rd, 2009, 12:35 PM	#15
flattusmaximus78 MM Fanatic 1993 5.ohhhh 14.47 at 96 mph Join Date: Apr 2006 Location: Gatorland Posts: 4,707	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? __________________ exploder top end with 12 psi of v-tech

July 3rd, 2009, 04:21 PM	#16
93mustank Hardcore Enthusiast Join Date: Aug 2008 Location: Phoenix,AZ Posts: 2,454	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

July 3rd, 2009, 04:29 PM	#17
87gtmustang Regular 1987 mustang GT Join Date: Oct 2008 Location: tx Posts: 257	kind of but not completely __________________ 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

July 3rd, 2009, 04:30 PM	#18
93mustank Hardcore Enthusiast Join Date: Aug 2008 Location: Phoenix,AZ Posts: 2,454	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

July 3rd, 2009, 11:17 PM	#19
87gtmustang Regular 1987 mustang GT Join Date: Oct 2008 Location: tx Posts: 257	how do you pull the fuel rails __________________ 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

July 3rd, 2009, 11:44 PM	#20
1slo5.0 Zippee is my step sister. 1990 Mustang LX 9.36@143 mph Join Date: Jan 2006 Location: Fond du Lac, Wisconsin Posts: 10,356	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. __________________ Thanks to: Trick Flow, Team Z Motorsports, Total Engine Airflow and Furo Racecraft My daily driver has 16 cylinders and 4400hp @ 1000 rpm....

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