New motor gone south? *SICK STOMACH*

1993SSP

Founding Member

Sep 5, 2001

1,194

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37

Ky

Dec 30, 2004

#1

• Dec 30, 2004

• #1

Took the stang out for a spin, probably 75 or 100 miles on it, fresh bottom end, thumper combo up top, well i get on it going from 1st to 2nd, didnt hit the RPM's too high, I hear a pop and is starts missing, the motor is making a ticking noise and you hear a clunking noise every few seconds while idling, anyone have any guesses on this one? All i know is IM SICK! I dread tearing it back down. Holds oil pressure fine and doesnt get hot

 

Rick 91GT

Mustang Master

Nov 29, 1999

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Dec 30, 2004

#2

• Dec 30, 2004

• #2

First thing I would do is a compression test and leakdown test, then pull the valve covers.

 

M

manpowermustang

Member

Sep 25, 2004

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16

Milwaukee, Wi

Dec 30, 2004

#3

• Dec 30, 2004

• #3

I think its best off tearing it down,and spending a few days going over it. Whats it gonna cost ya? 150.00 in gaskets and about 5 hours? sounds a bit better then just guessing and asking everyone here. Yeah it could be something spimle but who knows.

 

1993SSP

Founding Member

Sep 5, 2001

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Ky

Dec 30, 2004

#4

• Dec 30, 2004

• #4

Ah, I'll just get some rest and start the tear down tomm, better it happening now than later, hopefully its something simple in the upper end, I dont think it's a bottom end problem

 

bluevenom867

I will have images of molesting stuffed animals in

Dec 15, 2003

1,704

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St.Petersburg,FL

Dec 30, 2004

#5

• Dec 30, 2004

• #5

Thats what my 351 did when it blow a head gasket.Feel like it got a miss and doesn't got the same power it always does?Doesn't want to revv like normal?I just pulled all the plugs, stuck my finger in each plug hole and found two next to each other that were low feeling.Took off thew heads and it burned thru the
num. 3-4 fire rings.

 

sheff2720

New Member

Nov 30, 2003

182

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Horsham, PA

Dec 30, 2004

#6

• Dec 30, 2004

• #6

i'm going to have to agree with rick on this one.. dont go taking it all apart just yet.. do a few tests first to narrow your search.. after youve done those tests pull the valve covers and check out all of the springs, rockers, pushrods ect.. if you dont find any problems thewre, then go ahead and start taking the rest apart.. hope it all works out

 

Rick 91GT

Mustang Master

Nov 29, 1999

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Dec 31, 2004

#7

• Dec 31, 2004

• #7

sheff2720 said:

i'm going to have to agree with rick on this one.. dont go taking it all apart just yet.. do a few tests first to narrow your search.. after youve done those tests pull the valve covers and check out all of the springs, rockers, pushrods ect.. if you dont find any problems thewre, then go ahead and start taking the rest apart.. hope it all works out

Click to expand...

That was my theory...first you need to find the problem, then figure out what happend and why, then fix it.

 

1993SSP

Founding Member

Sep 5, 2001

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Ky

Dec 31, 2004

#8

• Dec 31, 2004

• #8

thanks for the feedback guys, i'll get the guy who built mu engine to help me out.

 

5.0 HOtrain

Founding Member

May 20, 2001

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New Hampshire

Dec 31, 2004

#9

• Dec 31, 2004

• #9

Sounds like a pushrod/rocker/valve spring problem. With the popping and missing fire and ticking all of a sudded. Do what Rick suggested, leakdown/compression test. Then pull the vavle covers. If nothing is found, then time to dig deeper. Good luck.
mike.

 

1993SSP

Founding Member

Sep 5, 2001

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Ky

Dec 31, 2004

#10

• Dec 31, 2004

• #10

The culprit has been found!! Damn rocker arm bolt broke off in the head, and ended up with a warped pushrod. Any easy ways to get the broken bolt out that any of you all know? If not I'll get my motor guy to come drill and tap it, but at least its not a major problem...........yet.............

 

RIO5.0

15 Year Member

Feb 16, 2001

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Dec 31, 2004

#11

• Dec 31, 2004

• #11

Sounds like you lucked out...Those bolts aren't TQ'd all that much so they should come out fairly easy, least if they're Ped's??....I'd drill a 3/16 hole and tap and Easy-out in there...should back out easily...

Other than your mishap...hows it pull???

 

Soupy

New Member

Nov 23, 2004

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Rhode Island

Dec 31, 2004

#12

• Dec 31, 2004

• #12

RIO5.0 said:

Sounds like you lucked out...Those bolts aren't TQ'd all that much so they should come out fairly easy, least if they're Ped's??....I'd drill a 3/16 hole and tap and Easy-out in there...should back out easily...

Other than your mishap...hows it pull???

Click to expand...

Also, to prevent chips from getting into the mix, use magnets to gather them. If you wrap them in rags, they'll clean up easier. BTW, those bolts are probably hardened, so try to find a carbide drill bit and run it fairly slow. Good Luck.

 

1993SSP

Founding Member

Sep 5, 2001

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Ky

Dec 31, 2004

#13

• Dec 31, 2004

• #13

Pulls great, its getting better as my comp adjusts, i was trying to give it time and get a dyno tune and a superchip done,im glad this happened close to home and not on the dyno

 

hllon4whls

BANNED

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Jan 17, 2002

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Covington

Dec 31, 2004

#14

• Dec 31, 2004

• #14

Check to verify that your valve has not seized and that you dont have coil bind at full lift. Other than that, you may have had a difective part. I doubt that you floated a valve into the piston at that speed.

 

RIO5.0

15 Year Member

Feb 16, 2001

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Dec 31, 2004

#15

• Dec 31, 2004

• #15

1993SSP said:

im glad this happened close to home and not on the dyno

Click to expand...

Amen to that...5800 and it lets go... A blessing in disguise...

 

1993SSP

Founding Member

Sep 5, 2001

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Ky

Dec 31, 2004

#16

• Dec 31, 2004

• #16

Well guys, Its back together and running like a fine tuned machine
Im gonna get my superchip and dyno tune in a month or so and be finished with it, it didnt feel like i cranked it too hard but i may have, anyone reccommend a comfortable RPM and a Rev limiter, i may go with one just in case my foot gets too happy in the future

 

5.0 HOtrain

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May 20, 2001

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Dec 31, 2004

#17

• Dec 31, 2004

• #17

1993SSP said:

anyone reccommend a comfortable RPM and a Rev limiter,

Click to expand...

Factory one kicks in at 6250. On the street with the 418 (COMPLETELY different animal) I run a 6,000 rpm chip. With the msd it seems to kick in at about 5800rpms. At the track I throw in the 6800rpm chip.
mike.

 

Rick 91GT

Mustang Master

Nov 29, 1999

9,692

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99

PA

Jan 1, 2005

#18

• Jan 1, 2005

• #18

1993SSP said:

Well guys, Its back together and running like a fine tuned machine
Im gonna get my superchip and dyno tune in a month or so and be finished with it, it didnt feel like i cranked it too hard but i may have, anyone reccommend a comfortable RPM and a Rev limiter, i may go with one just in case my foot gets too happy in the future

Click to expand...

Look into a MSD Digital 6+, has all the features you will ever need in a nice little package.

 

04sleeper

Founding Member

Jun 22, 2002

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89

Dallas, TX

Jan 1, 2005

#19

• Jan 1, 2005

• #19

Glad to see it's back together and running.

Hopefully that sick feeling has gone away.

 

Ourobos

Member

Apr 12, 2004

260

1

17

Jan 1, 2005

#20

• Jan 1, 2005

• #20

How old are the springs on your combo? Did you upgrade your cam when you rebuilt it? I had the same thing happen to some GT40 heads 3 times. I thought I was slapping a piston, but turned out I needed new valve springs. Solved all my problems (before I broke a rod anyways). I also use allen head cap screws, they're the hardest bolt you'll find. Good luck. (Where in KY are you at? I'm in Bowling Green)