First Bronco Broke

[pissyellow73]

I am 16 and just picked up my first car on sunday a 73 bronco so as we began every thing was fine then 13 miles later, smoke starts blowing out of the oil cap and loud clunks are herd in the motor. We stop the truck to see iff it had over heated but no, it was somthing else. The motor is now sezied, I checked the plugs today and they were covered in oil. PLEASE if you know what could be wrong or know how to fix such a problem,please help me, My dad said It might be a head gasket But I just don't know.

 

[94_bronc]

if the motors seized its time for a re build (

 

[Broncoholics]

Better take it apart and take a look. If the cylinder walls are all scraped up or the oil pan is filled with metal flakes the motor is toast. If not you might be able to get it honed out, new rings, rod bearings, cam and crank shaft. Have the heads looked at so the valves are in good shape. Its all standard maintenance! :blush:

 

[Toby the Dancing Bronco]

Sounds like you are faced with a great opportunity to do it right the first time! Some of us have to work hard at breaking engines and such. You don't have to go big dollar parts to make a lot of power and reliability. I suggest that you start at the begining and find a machine shop that can (and in this order): verify your block and heads are rebuildable; line bore the crank saddles; surface grind the decks on the block THEN bore it out; consider a new crank if it won't clean up at .010/.010. Balance the things that spin and go up and down. Replace the Harmonic balancer if it looks cracked and stuff. If you have California heads, consider getting older 302 heads, or better yet, 351 W heads for the larger valves and combustion chambers. (The valves in these heads are also able to be adjusted) Surface grind the heads, replace the guides (brass liners are great) and replace the exhaust seats. Full cam kits come with new springs, and are not too much. A double roller timing set is a must. A cleanly machined engine will give you years of peace of mind and effecient operation. Done right, you will get enough power for your needs for a long time to come!