I took the intake off replaced lifters & pushrods. Put it back together, now it's starts, idles real rough & dies. Vacuum gauge is reading almost nothing..... is this an indication of a vaccum leak....
Did you prime lifters? Does it have oil pressure. Why did you change pushrod and lifters? Yes it can be a vacuum leak. Can be other things. Did you move distributer at all? Leaving out a lot of information to help determine what is wrong.
Lifters primed. Good oil pressure. I built a stoker 370.... been nothing but a pain in the ASS! Machine shop thought stock pushrods would work.... too short. Pretty sure it had a stuck lifter, was sounding like a sewing machine..... hence I removed intake & replaced lifters & put in new pushrods. Distributor is good, but car won't idle worth a ****.... maybe I'll remove intake & sealed it up again with rtv
RTV only on the water ports and even then I only use a skim coat. RTV is gasoline soluble so it doesn't go on the intake ports. I use Permatex high tack. Are you using a steel gasket?
No steel gasket ..... I made gaskets for the intake. I use ultra blk permatex instead of those rubber block seals that come with new intake steel gaskets
I've set the valve lash a million fu***** times in the last month, & I will do it again. Maybe I'm doing it wrong with the roller rockers. I'm almost ready to give up on this **** box
Or it is adjusted wrong, too tight and the valves are being held open. Rotate the engine to #1 firing, and adjust both valves on #1 cylinder. Turn the engine 90* and adjust the next cylinder in the firing order. Keep going until you adjust all the valves. 1/2 turn past 0 lash.
Doesn't sound like a stroker problem, sounds more like a possible cam and lifter/intake sealing problem to me or just a plain old sbb 350 problem. How is the extra stroke causing any of your problems? Anyway, did you check cam to make sure you didn't have any wiped out lobes when the intake was off? If its that then that could of happened to any flat tappet build and is why I try not to use a flat tappet cam if in I can help it anymore. Is your distributor timed correctly? Are the wires on in the proper order? Is the cam degreed in where it should be? Did you check to make sure your coil is good? What about your fuel pump? Is it getting enough fuel? Sounding more and more like a possible tuning problem rather than a stroker problem, unless its a build assembly problem? Did you do a compression test to confirm there are no internal engine problems? With the lack of vacuum that would be where I would look after I confirmed that everything in the previous 2 paragraphs were checked. If you sent to much fuel into the cylinders you could of washed out the rings, meaning that the to much fuel washed the oil off the cylinders causing extremely fast excessive wear to rings and cylinders. When this happens you will lose compression and have symptoms that you described, hopefully this isn't it? Something to check though. Hopefully its something simple that was overlooked. Wish you were closer I would take a ride out to help, I hope you get things sorted out soon. GL Derek
Hey Derek, it's not a striker problem, just a frustrated man problem..... I readjusted all the rockers, I'm pretty sure they were too tight. I will drop intake on again tomorrow, let it seal up & hope for the best!
If you didn't already, with the intake off inspect ALL of the cam lobes to make sure they are all still as high as they're supposed to be before you set the intake on. Should only take a couple of minutes to verify with how the block is casted there makes it easy to see the cam. Hopefully it was a vacuum leak from the intake and all will be well when you re-install it. GL bud. Derek
Cam looks perfect! I initially thought I might have wiped out a few cam lobes. I'm thinking intake didn't seal.
I hope that was your problem and the re-install goes smoothly, I can't wait to hear how that thing runs! GL Derek
If you suspect a leaking intake seal use some propane around the area and if the idle speed increases there is a leak. I would do a Leakdown test to ensure the valves are sealing up ok
I made some pins on mine to make sure that the intake was going to drop right where it needed to. You could just have a leak. Look at my SP3 install and on the last page I have pics on what I am doing with the intake install.
if you have to throw the gas at it to make it run then you have a huge vacuum leak. plain and simple. this is assuming you have the timing set or at least close.
Dry fit the intake first, your dealing with decked surfaces , you could have two different angles trying to go together
