noisy hyd roller lifters
 

Just a quick question....
How noisy are roller hyd lifters suppose to be...Fresh 383 about 1300 miles on new motor
They seem to clatter at about 1800-2200 rpm I have set them and reset them 3 times they still seem to be noisey....is there something wrong..?


SPECS=
1965 el Camino
383 4 bolt main roller block 30 over
Bore & hone with torque plate
RPM 4130 forged steel crank
Clevite rod bearings CB663P-8-000
Clevite main bearings MS909p-000
KB prem forged CNC pistons 3.75 X 6.000 X 5cc flat tops
H beam 6" 4340 rods
Dart Pro1 215 heads 64cc angle plugs 205/160
Comp Cam XE288HR Hyd roller cam Duration@50 236/242 LS110
GM 2148 Hyd roller lifters
Comp Cam pro 1.6 Magnum roller rockers
Air Gap intake
Demon 750
700r4 w/2900 stall
posi 373 gears
Dyno 502hp at 6400 / 464tq at 5100 to the flywheel

Roller Hydraulic Lifters should be as quite as they come. I have heard that Comp Cams and components are not the greatest. I'm sure that will be mentioned again. Sounds like you may have a lifter or 2 or 3 bleeding down.

what good components would be recommended to replace what I have...?

Many rollers are noisy, especially GMs. Just listen to any ZZ4 and you'll hear them plain as day. Don't worry about it.

Thats cool...I hope so...I will make a sound clip and attach it tomorrow...then you guys can let me know if I just being picky...

A Friend of of mine runs that same grind in a very similar 383 and it too is very noisey...

Ok I finally made the video so how do I post it.....?

exactly..... can here mine @ ideal and standing outside and to the sides of the engine bay .......

ok i have the video now...take a listen and let me know if it sounds normal or not...
http://www.youtube.com/watch?v=qhmr1FdgTlw

First off, that's a very good video! Most we see are crappy and have horrible sound.

Hmmm, kinda a tough call but to me, it sounds really noisey. We have a Comp roller with their 286 cam and it's pretty quiet compared to yours. Since you have a very loud exhaust and it still comes across as valve noise, i'd be suspect on it. Hopefully some of the others will give their opinion.

What rockers do you have on the heads?

Mark

Thanks Jmark...
The rockers are the Comp Cams Pro Magnum 1.6

Yes great vid. Great sounding small block. Personally, the light valve train noise wouldn't bother me. Although I am used to mechanical rollers... :D .

I bet your valve covers are exaggerating the noise some. Sounds crazy but try a different pair before you resort to drastic measures.

Other than that, double check your lifter preload. The Comp hyd. roller lifters I have spec .030" of plunger preload, which happens to be a half-turn at the rocker with a 7/16 stud. I don't know what GM specs on theirs as far as preload.

agree
sounds can be, well....

I readjusted them all 2 times yesterday....set to TDC spun the pushrod till it gave resistance then I went 3/4 turn and locked them down....Also my
harmonic balancer has a mark called VERTICAL TDC and then the timing marks starting with 0........10........20.........30 etc
I set at the the TDC at this Vertical TDC, was that the right thing to do or should I have set it at o...?
its a Professional Products Harmonic Balancer

A quote from the Professional Products damper instructions:

We have made a running change in our 6-3/4" SB Chevy 350 dampers #80000 and #90000 by adding another TDC mark which is labeled "Vertical TDC." This is for those engines produced from 1984 to 1995 which have the TDC mark at
the top of the balancer and are timed by looking down behind the water pump
to view the timing pointer. Use an aftermarket timing tape if desired."

Use the '0' zero on your balancer.

Here is what I do for adjusting lash and preload, This method works best with degreed balancers with marks every 90 deg.

Start with zero, #1 on TDC. Adjust #1 Intake and Exhaust, rotate engine clockwise with turning socket by hand 90 deg. and adjust #8 Intake and Exhaust...then another 90 deg. and so on.. 1,8,4,3,6,5,7,2. and you are done. Basically you are following all the TDC events in the firing order. Two full turns of the engine is all you need.

That's the method to my madness anyway. :thumbup: