Re: 81 bronco 351 timing adjust w aftermarket pulley?balancer
On 12 Jun 2005 18:14:54 -0700, "BRONCO BIFF"
>I was doing about 70 on the freeway when my bronco decided to quit.
>>From previous discusions it looks like it jumped timing. With 12k on
>(assuming 112 ) it(the engine) just stopped as if someone had turned it
>off. Can the timing be adjusted just to get it home? What usually
>jumps? The distributor or the cam? This engine looks like it has an
>pulley/ balancer and I don't see any numbers,marks on pulley or
>nor a marker on the engine. How do I adjust?? The cap and rotor are
>weird and the distributor was throwing out some oil just before this.
>Can I get away with just a new chain or should I change the gears too??
>It does have a spark,and no alves are hitting,when the starter cranks,
>but it cranks fairly fast. Can anybody with the same experince help me
If the timing chain has jumped so that it quit while going
down the road, it is not going to run until repairs are
made. Also, it is not usually possible to tell what kind of
valve damage you may have w/o doing a compression test as
the lifter will partially collapse allowing some clearance
even though a valve may be bent. An engine that has jumped
will have uniform low compression. There is no amount of
adjusting the ignition timing to make it run if the timing
chain is jumped. If you have not already screwed around
with the timing, you can check timing with a light while
someone cranks the engine for you. If the ignition timing
is not off more than 5 deg or so, the timing chain may not
be your problem unless you make it so.