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10-21-2011, 08:41 PM
(This post was last modified: 10-21-2011, 08:43 PM by broncosbybart.)
Nah, if something was in there during the build, it wouldn't have made it to 5k. If it is running too lean (intake leak), you can burn pistons up. What color were the other plugs? Your push rod bent because the valve contacted the piston at TDC, as it came apart. Chances are good that the head is cracked now as well.
You ain't gonna buff that one out... That sucks.
28 oz engines were made up until about 79' to be safe. maybe 84, but 79 and earlier will be a definite. might take crawdad up on his offer.
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Missed the 5K part. Disregard.
'77 351w- Explorer EFI, 4R70W, 4-link, lockers, 4.56, 35" MT/Rs with a severe rock addiction.
mokin:
Roads? Where we're going, we don't need roads.
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The metal below the carb is former piston. Once it let go it shot metal all through the engine. It is a result of the failure not the cause of it. Check the valves and see if the guides are worn. Or if any of the valves are broken off. No space for anything that big in the combustion chamber. A greater than .500 lift cam without clearancing the piston will cause contact issues. I had a valve guide go bad and allow the valve to tip sideways just enough to contact the piston and grenade. The bent pushrod is interesting. I did that to a friends 383 Dodge one time. At 7200 rpm though. 12 sec 1/4 mile car at 3700lbs.
Tim
74 Bronco Ranger halfcab w/toys: lockers f&r, wristed arm, C4, D20, hyd assist steering, 37"MTRs, warm 302. Capability, that's what I'm talkin' bout.
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That sux dude. Good luck finding a donor. I had a guy call me other day about a 302 cheap lemme c if he still has it
If you can't fix it with a hammer and a welder then your gonna need a new one!
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Man that sucks! Sorry to hear that. I reminds me of the cash for clunkers program, we did that on purpose. What happend to yours is anyones guess. I would say something was left loose, not much worth saving. I can check our local yard for a block if you need one.
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nate...a local bronco guy here just pulled a 302 out for a new crate motor, he said i could have it...but you are welcome to get it. its here on johns island. dont know anything bout it yet. ill check tomorrow if you havent found anything yet. very sorry to hear this man...wish i was closer to help ya
77 built 306,Trickflow Cam/Alum Heads/dome pistons/10:1comp,nv3550,duff long arms,3.5" lift,family cage,protofab rear bumper,twin sticked, and 35KM2'sG.D.I.
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I'd place my bet on a valve spring.
What are the specs on the cam?
Improper balance would have knocked the bearings out long before now.
'72 TBA...
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Nate,
You still planning to come up here on Sunday still?
[SIZE="2"]77 project bronco w/ 5.0 & c4, Sagi PS, 2 hard tops, eyebrow grill [/SIZE]
WANTED: auto column, gas tank, front/ rear seats
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Yes sir, gonna head that way after church if that's cool with you. Get up there about 3ish...
