help - i screwed up on my v8 - advice needed Options

[jimkelly]

last week we determined that some of my oil leak problem was 4 bolts holding my carb intake to the heads, so we applied sealant and 3 stopped leaking. on Saturday I thought i'd address the last one that did not stop leaking, so not only did I add sealant to it again, I decided to use a longer bolt because the other 3 were longer. I used a 1.5" bolt but it turns out the other were probably 1.25", the max that should be used. so anyway, monday go for a drive but power is weird, I figured it had to do with engine being cold and I just changed the fuel filter and thought maybe there was some starving going on, but 30 minutes later I decided to go back home and figure out what was wrong. anyway, yesterday I pull the valve cover off to find a cracked valve rod that I retrieved from the head with a magnet on a stick but I had to remove the intake to put the lifter back in the head. anyway, it is all back together but it revs ok in neutral but under load it is either valves or knocking. what you think? anyway, why does a guy with so little mechanical prowess own a 914, who the hell knows. i'd like to think the noise is due mostly to timing cause I of course had to pull the distributor. and I never put a tdc mark on my flywheel or crank balancer, need to, asap. I first thought it was vacuum advance problem but vacuum is pulling thru hose.


https://www.youtube.com/watch?v=tfKEa1-W0XQ


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[veekry9]

It's an old Chevy... Put a push rod in, adjust the valve and put it back together.

Yep.
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If it blows,a near new wrecker is available for less than 1K.
Almost as disposable as shoprags.
One other thing,be certain the pressed in rocker stud was not damaged,inspect the rocker's bowl and stud's ball,make sure the rocker's face is not marred.
These stamped rockers can bend in some interference circumstances.
If the cylinder will hold air,screw in an airhose plughole adapter and release the spring keepers.
Don't lose them,use a magnet,or rag to keep them from falling.
Make certain the cylinder is at TDC,you don't want the valve to fall into the hole.
You can now check the run-out and clearance of the valvestem.
With 0.0025" wiggle or runout,the max wear has been reached.
With a worn guide and poor seals,the engine will blow blue smoke and foul plugs.
A scope of the piston top will show heavy carbon buildup.
Once you find the heads beat,check the shortblock's bottom end.
A new set of heads is on the getlist,because the aluminums are cheap enough.
Check your local craigslist,they're hot commodities.
Have fun,it doesn't get cheaper than this.
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