yes , obviously you drop back and check all the basics,
yes this may require partial engine dis-assembly to verify everything was done correctly
so your not guessing ,
but working with valid numbers/info verify the engine has adequate fuel pressure and no vacume leaks
and the ignition timings set correctly and TDC is correct, if you have issues drop to the basics
ideally you own a timing degree wheel that you can use on the damper bolt thats about 8--9 inches in diameter
a long damper bolt a few washers and a pointer (you can make from a clean arc welding rod,
you bend to fit and secure to a water pump bolt, or other bot location,
depending on the degree you need to remove the engine accessories or timing chain cover to verify the cams degreed in correctly,
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youll start with having
a compression/leak down test ,
during the assembly process you did verify the piston to valve clearance... didin't you
this is an old post I got asked to repost, naturally the first step is to install and correctly degree in your cam, http://garage.grumpysperformance.com/index.php?threads/measuring-piston-dome-volume.17255/...
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all cylinders should be well under a 7% -8% on the variation in cylinders compression on a new engine
and
verifying the cams been properly degreed in correctly, you used a degree wheel did you not??
IM frequently asked (why bother degreeing in a cam, the timing set comes with index marks to install it?) it basically comes down to, a question of do you accept a random install where the timing can be almost any place randomly or do you insist on maximizing the engines potential and know...
garage.grumpysperformance.com
Honestly, I have to wonder at times about the thought process or in many cases the lack of thought and research that I see going on.I don,t know about the guys you might know, but it seems all too common for guys I know to find something amiss, or out of adjustment and they immediately just...
garage.grumpysperformance.com
I’m new to this forum thing so hello, I need help building a basic engine so I’m gonna provide as much information possibly for you knowledge people. I’ve recenty bought a 1991 Chevy single cab RWD and it has a 454 that was swapped into it. Not original engine, looked up my casting numbers and...
garage.grumpysperformance.com
verify ignition and valve timing by verifying
TDC
(top dead center) on the damper and timing tab agree,)
verify your fuel pressure and oil pressure
verify the ignition wire and firing order match the cam lobe firing order
18436572 on most SBC & BBC chevy v8 's there are 4-7 swap cams (you don't have one do you..???)
now back off all the rockers, until they are all loose, no mater how far you rotate the engine,
turn the dampper to tdc, rotate the engine until your damper indicates its moved 45 degrees and tighten all your rockers only until they are
no longer floppy loose, turn the crank 45 degrees further and tighten any rocker thats now
now floppy loose, turn the crank 45 degrees further and tighten any rocker thats now floppy loose, repeat 16 times,
45 degrees at a time
at this point you can test fire the engine and properly adjust the rockers
this is an area that causes many newer guys problems ,a slight clicking noise at idle in any hydraulic or solid lifter valve train is usually the result of clearances in the valve train, obviously you should have, some clearance, to allow oil flow thru the lifters to provide lubrication on...
garage.grumpysperformance.com
let us know what you find up to this point and we can continue isolating your potential problems if they are not obvious yet