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uh ohhh!
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uh ohhh!
by B.O.B. » Fri Nov 21, 2014 2:27 pm
so the last time I drove my bronco was a few weeks ago and it started backfiring through the tb. Seconds before that I heard what I thought was a nut coming loose. Finally got to pop a valve cover off and found that #3 exhaust rocker stud broke in half. How does that happen? Now I need to find a new stud to replace this with. Does anyone know if the parts houses (autozone, oreillys) carries them.
71' bronco, np435 w/trailbanger, 302 efi, 35" KM3 on 17x9 Fuel Anza, warn xd9000i, cage arms, 5" lift
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uh ohhh!
by akaFrankCastle » Fri Nov 21, 2014 3:22 pm
Unless the stud was somehow fatigued, the most likely cause I can think of is a valve tapping a piston. How does the corresponding push rod look?
I don't think you're going to find a rocker stud at a big box parts house. I would try one of the online speed shops or maybe amazon.
I don't think you're going to find a rocker stud at a big box parts house. I would try one of the online speed shops or maybe amazon.
Stroppe'd
1972 Sport, 302, 3 speed with old school Duff floor shifter, T shift Dana 20 with JB Fab twin stick, 4.11 gears with Trac-loc, Lincoln hydroboost, Chevy disc conversion, WH gas lift gate shock kit, 33" Duratrac tires on slots and about 2.5" of lift, Stroppe installed: bumper braces, dual shocks on all four corners, GM power steering, trans cooler mount, auto shift column, rollbar.
The Terrible One
1972 Sport uncut, 302, C4 with 1974 column , T shift Dana 20, 3.50 gears w/ limited slip, 1966 U13 Roadster kick panel, and factory power steering.
1973 Stroppe Baja project
1972 Sport, 302, 3 speed with old school Duff floor shifter, T shift Dana 20 with JB Fab twin stick, 4.11 gears with Trac-loc, Lincoln hydroboost, Chevy disc conversion, WH gas lift gate shock kit, 33" Duratrac tires on slots and about 2.5" of lift, Stroppe installed: bumper braces, dual shocks on all four corners, GM power steering, trans cooler mount, auto shift column, rollbar.
The Terrible One
1972 Sport uncut, 302, C4 with 1974 column , T shift Dana 20, 3.50 gears w/ limited slip, 1966 U13 Roadster kick panel, and factory power steering.
1973 Stroppe Baja project
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akaFrankCastle - Official CCB Member
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Re: uh ohhh!
by akaFrankCastle » Fri Nov 21, 2014 3:25 pm
You probably need to check your timing chain to see if slack or a break lead to a possible valve/piston collision.
Stroppe'd
1972 Sport, 302, 3 speed with old school Duff floor shifter, T shift Dana 20 with JB Fab twin stick, 4.11 gears with Trac-loc, Lincoln hydroboost, Chevy disc conversion, WH gas lift gate shock kit, 33" Duratrac tires on slots and about 2.5" of lift, Stroppe installed: bumper braces, dual shocks on all four corners, GM power steering, trans cooler mount, auto shift column, rollbar.
The Terrible One
1972 Sport uncut, 302, C4 with 1974 column , T shift Dana 20, 3.50 gears w/ limited slip, 1966 U13 Roadster kick panel, and factory power steering.
1973 Stroppe Baja project
1972 Sport, 302, 3 speed with old school Duff floor shifter, T shift Dana 20 with JB Fab twin stick, 4.11 gears with Trac-loc, Lincoln hydroboost, Chevy disc conversion, WH gas lift gate shock kit, 33" Duratrac tires on slots and about 2.5" of lift, Stroppe installed: bumper braces, dual shocks on all four corners, GM power steering, trans cooler mount, auto shift column, rollbar.
The Terrible One
1972 Sport uncut, 302, C4 with 1974 column , T shift Dana 20, 3.50 gears w/ limited slip, 1966 U13 Roadster kick panel, and factory power steering.
1973 Stroppe Baja project
-
akaFrankCastle - Official CCB Member
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Re: uh ohhh!
by Kinder » Fri Nov 21, 2014 4:45 pm
Above and I bet a machine shop may have a few laying around.
Best to Date MPG: 26.6
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Re: uh ohhh!
by D&D72 » Fri Nov 21, 2014 5:07 pm
pretty sure NAPA and CARQUEST carry that stuff. (at least they have in the past)
That guy John.... whatta Jerk.
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D&D72 - Official CCB Member
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Re: uh ohhh!
by B.O.B. » Sun Nov 23, 2014 4:34 am
Push rod is fine . Still straight. I'll have to figure out a way to get me a new one.
71' bronco, np435 w/trailbanger, 302 efi, 35" KM3 on 17x9 Fuel Anza, warn xd9000i, cage arms, 5" lift
- B.O.B.
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- Posts: 771
- Joined: Thu Nov 11, 2010 9:31 am
Re: uh ohhh!
by B.O.B. » Sat Nov 29, 2014 7:36 am
So I have my 302 engine building book packed away and can't remember the way to correctly it ten the rockers. Any help would be appreciated.
71' bronco, np435 w/trailbanger, 302 efi, 35" KM3 on 17x9 Fuel Anza, warn xd9000i, cage arms, 5" lift
- B.O.B.
- Official CCB Member
- Posts: 771
- Joined: Thu Nov 11, 2010 9:31 am
Re: uh ohhh!
by B.O.B. » Sat Nov 29, 2014 7:38 am
I believe it was a bad stud as well. Working in the tire business I have seen many of wheel studs either fail due to cross threading or just fatigue/poor metal. You can definitely tell it was just a bad stud.
71' bronco, np435 w/trailbanger, 302 efi, 35" KM3 on 17x9 Fuel Anza, warn xd9000i, cage arms, 5" lift
- B.O.B.
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- Posts: 771
- Joined: Thu Nov 11, 2010 9:31 am
Re: uh ohhh!
by B.O.B. » Fri Dec 05, 2014 2:52 pm
Finally got it all back together. Definitely needed to go back and adjust some of the other rockers. I'll run it a little bit more then maybe go back in for one more adjustment.
71' bronco, np435 w/trailbanger, 302 efi, 35" KM3 on 17x9 Fuel Anza, warn xd9000i, cage arms, 5" lift
- B.O.B.
- Official CCB Member
- Posts: 771
- Joined: Thu Nov 11, 2010 9:31 am
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