valvetrain noise 440

challenger · Post by **challenger** » Mon Jul 06, 15 8:40 pm

recently fitted a fresh motor to my chally, seems to be a lot of valvetrain/timing chain noise coming from the front end, dont hear it when driving and motors nice and smooth ive set the lash 6 thou tighter than cam card specs,is the noise just due to aggressive cam ? heres the specs of the motor, ive also done a qiuck vid of the motor,
440+30
kb184 slugs 2 1/2thou bore clearance (quench pads milled to zero deck,pistons sit at 20 below tdc)
block decked 60 thou, valley tops decked 40 thou
comp around 10.4
bottom end balanced
magnum 306 cam, 306dur 555"lift installed at 106
billet rollmaster timing chain
eddy rpm heads, isky iron rockers
m1 intake
900 c&s carb

Mick70RR · Post by **Mick70RR** » Mon Jul 06, 15 9:50 pm

It does sound noisey Jim. It sounds like my engine did when I changed to Stealth heads. Turned out the pushrods were hitting the head and I had to open the pushrod holes up. That's not normally a problem with Eddy heads so it could be something else but worth checking. Check that the valve spring retainers are not hitting the rockers too. Pull the rockers and check for any marks on the underside.

challenger · Post by **challenger** » Mon Jul 06, 15 9:58 pm

thanks for that mick, thing is i,m using the same heads,pushrods and rocker gear that was on my old motor, there is more lift but not loads from 528 to 555 and the pushrods are very close, the noise seems to be right at the front, strange thing is is seems quieter at higher revs and you certainly dont notice when driving along unless you below 1500rpm

John · Post by **John** » Mon Jul 06, 15 10:18 pm

Could it be the cam to distributer gear or the dizzy drive itself Jim, have you one of the collars that could of come loose?

challenger · Post by **challenger** » Mon Jul 06, 15 10:27 pm

ive checked them john, got a trev d collar on but double checked and alls tight, i really put this motor together carefully so struggling to see what it is, maybe i have got to pull front end off and have pushrods back out etc when i first started this motor it sounded like there was 3" of slack in the timing chain !! once ran for half hr it calmed right down

Mick · Post by **Mick** » Mon Jul 06, 15 11:25 pm

Can you hear it in neutral as well as in gear ? Are you sure it's not a header leak ?

challenger · Post by **challenger** » Mon Jul 06, 15 11:46 pm

yes you can mick its def not header noise, click on the link for the vid, my phone going close up to the cooling fan makes it sound a bit worse

drewcrane · Post by **drewcrane** » Tue Jul 07, 15 12:32 am

challenger wrote:yes you can mick its def not header noise, click on the link for the vid, my phone going close up to the cooling fan makes it sound a bit worse

I just listened to yours , mine is pretty noisy kinda the same , and has always concerned me, but still runs, and I have about the same lift cam with hydraulic lifters, its about 0.572/ 0.585 lift, with a duration @.50 223/230 and I feel it is about the maximum with out going roller.

But from the way yours sounds something is different,have you pulled one or both valve covers,and maybe check the push rods .

I am running vid of my car at the same time and mine is noisy, but yours has a miss , something is different.

here have a listen,from the 1:10 mark mine is about the same as yours,especially when I put it in park, it almost sounds like a diesel , but 10 years and 50 k miles and still runs strong, but I agree they sound like they want to break

Mick · Post by **Mick** » Tue Jul 07, 15 12:49 am

So you're running 0.016 " ? I would take the rocker covers off, check the lash and look for any interference or signs of damage. As Drew says, it sounds like it's misfiring.

challenger · Post by **challenger** » Tue Jul 07, 15 1:53 am

Thanks for that drew your motor def has a similar sound. Are we confusing the misfire with my cam having more duration ? 260@50 certainly doesnt feel like a misfire and pulls really strong. I will double check pushrods etc but i did check for clearance when i fitted them and they seemed clear of contact with the head. Yes mick valve lash set at 16. Hardly hear them when driving. Had more tappet noise with the mopar 528 cam

drewcrane · Post by **drewcrane** » Tue Jul 07, 15 4:43 am

challenger wrote:Thanks for that drew your motor def has a similar sound. Are we confusing the misfire with my cam having more duration ? 260@50 certainly doesnt feel like a misfire and pulls really strong. I will double check pushrods etc but i did check for clearance when i fitted them and they seemed clear of contact with the head. Yes mick valve lash set at 16. Hardly hear them when driving. Had more tappet noise with the mopar 528 cam

It could be a sound deflection at 1:10 on the vid, now I heard it again it is your shoes in the gravel(my bad), but to me I would run it and take my chances I have for years on this motor

I have heard alot of cars sound like this and run like f#@%

What kind/weight oil do you run?

cadboy · Post by **cadboy** » Tue Jul 07, 15 6:21 am

I will watch with interest on this one as mine sounds the same, but run good I think.

TW71 · Post by **TW71** » Tue Jul 07, 15 10:35 am

Does not sound too far away from mine, similar spec, there is defiantly a misfire going on, maybe a plug, try to find find temperature difference on header down pipes?

Carl · Post by **Carl** » Tue Jul 07, 15 11:30 am

Comp lifters in it? They seem to be very rattly these days bought 2 sets for stroker rebuild as well as rattling 1 lifter on first set collapsed second set just as rattly, I wondered if it was because of the oil through lifters and pushrods running along side the stock oiling system. Changed to mopar performance lifters that are not oil through and quite as a mouse.

Did you match the springs to the cam? If springs too weak you could be getting a bit of valve bounce.

Headers blowing can sound like tappets too.

Dave999 · Post by **Dave999** » Tue Jul 07, 15 2:24 pm

timing chain or sprocket hitting oil galley plug?

I had that but spotted it when dialling in the cam i.e before cover went on. My roll master has a bearing on the back of the cam sprocket.
you can also get them without. if mine had not had this I would have had more interference, plug in galley needed to be flat more or less level with block face to avoid chain and edge of sprocket.

I can't play you video at work so haven't heard the issue

Dave