Valvetrain noise after cam swap

[19Cutlass94]

Heres mine when I first started it up. Since then its gotten ALOT better.

[3400-95-Modified]

Still something not right if you ask me...

[geldartb]

ok heres a scan and a video from today
Scan

http://www.scandepot.net/viewscan.php?pk=4967

its actually idling solid no fluctuations. i RTV'ed the t-body gasket to the plenum and the throttlebody, i think it might have not been sealing 100% causing my really low IAC count on the stock setup.

this is with the lifters rebuilt with the LT1 springs inside them. only thing i can think of is the pushrods are a smidge too long.

i also changed out the injectors with ones of the same thing, so unless every injector i have is super noisy its not them. before it seemed like it was running rough maybe a clogged injector or something along that line.

also smells kinda rich. no more metal flowing through the oil though so that phase has come and gone.

[geldartb]

beats me. thing sat for 3 months prior to taking the engine out and fired up first try with no effort and no noise from the engine and this is with having the battery out the whole time.

once i fix the idle a little lower and let it run for a few hopefully the remaining lifters should fill up.

[3400-95-Modified]

well my car sat for 2 weeks while I drove to Key west... came home put a spare diff in it since I sent mine to the black hole we referr to as EP... and yeah fired right up no noises nothing, idled perfect too... right around 960 or so.

[PCGUY112887]

Superdave wow your engine is loud even compared to mine... I guess I have the quiet cam! But I think it's super loud when I hear my valvetrain from inside the car at high RPM's...

[geldartb]

well its back together and it runs now i just gotta bring the idle down. right now its idling at 1500, 1000 would be a little better but its stable and not surging anymore.

still has the sound but i prob didnt let it run long enough only had it running for not even a couple of minutes.

its not as loud as it was before kinda like half as loud. this is with the different lifters with the LT1 springs and totally cleaned out inside.

i know i gotta do something about the fueling it smells kinda rich. but the pcm is prgrammed for the correct IFR for the injectors that are in there and the fuel pressure is where it should be.


im getting about 38-40lbs of oil pressure and i can see the oil flowing into the head so its getting oil.

im gonna try swapping in another set of injectors, and the O2 with a different one.

[geldartb]

well its 90% back together with different lifters so next week well find out whether that solves the problem. i was getting hungry and hot so i left.

yeah the LT1 looked pretty damn good inside. pretty easy to work on inside a caprice. hell i think i sat on the radiator support the whole time without moving, my legs were half asleep and pretty stiff when i got up.

if and when i do build the other engine up its getting 3500 heads with the ironhead pistons, and all new parts and another cam probably.

[IsaacHayes]

Build it up with 3500 heads and throw it in a new beretta! Find a 5spd 93 and swap it in! That LT1 engine must look like mine inside. Clean. I wonder how my lifters look if everything else looks so clean. If this thing ever gives up (not sure it ever will LOL) I'll take it apart. So are you hesitant at putting the new lifters in cause you have a feeling it won't help? LOL Been there, you're like "Great this will fix it!" Then you think, "What if it won't.... I don't want to find out now!!" hehe Good luck!

[geldartb]

well i got my other lifters all cleaned out and the LT1 springs swapped inside, so there good to go. they had no signs of wear so they should be all set.

the LT1 lifters werent too bad inside, they were actually pretty clean as far as lack of crud buildup. the 3400 lifters had a bunch of heavy dark oil shit in the bottom so they got cleaned out good.
The LT1 engine i got them out of was actually pretty clean inside no sludge or buildup anywhere, i couldnt tell the mileage cause it had a digital dash.

if i get bored today ill go rip into the grand am and swap lifters. havent decided yet.

man i get that itch everytime i walk by my old 3400 block with the ironhead pistons in it, that just happens to be sitting on the stand in front of my car in the garage to build that one up. eh maybe next year or later this year.

[geldartb]

dont know what to tell you ben. i did it a couple of times on all of them and still on the second time it was still higher.

the noise defiantely didnt go away. the day i made the video it ran for like 5 minutes that day and this was after we primed the engine till the battery on the cordless impact died which was awhile.

the day i made the video was the second time it ran for more than 5 minutes. the first time after we put it back together it ran for about 5 or so minutes and it didnt go away.

this thing sat for 3 months and when i started it up a few weeks before i pulled the egnine it ran fine and was quiet didnt make a single noise.

i checked the gap on all the plugs and regapped where it was needed so there good.

[19Cutlass94]

I know I may be a little late here, but my motor had 8,000miles and I finially started it up today and I got that desieling noise that was described. But after a while of it running, it went away.

[SappySE107]

Well that surprised me. I don't know why number 6 is that much higher than the rest.

[geldartb]

cool maybe ill add that mod to the lifters before they go in, i scored some LT1 lifters from the yard.

thanks for the pic/info dave. just waiting to hear back from ben on the compression check numbers. they all seem to fall in the normal range except the one cylinder. this was a cold compression check btw.

[Superdave]

Yes, They help out with the higher RPM's as well..

here are some pics:
stock on the left and LT1/LSx on the right. that's the check valve spring. It holds the ball valve tighter so that the lifter dosen't fully pump up till the upper RPM's, supposedly makes running a large cam easier.

http://www.3500z.com/3500/Cam-Valvetrain/Misc%20301%20(Large).jpg

and here are the main springs.. stock on the left and LT1/LSx on the right.. the V8 one is slightly thicker, more coils and taller. it makes the plunger pretty hard to compress by hand unlike the stock spring.

http://www.3500z.com/3500/Cam-Valvetrain/Misc%20302%20(Large).jpg