ever hear a sound like this?
#1186550
02/26/12 05:29 PM
02/26/12 05:29 PM
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Joined: Oct 2003
Posts: 21,345 Marysville, O-H-I-O
70Cuda383
OP
Too Many Posts
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OP
Too Many Posts
Joined: Oct 2003
Posts: 21,345
Marysville, O-H-I-O
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Tomorrow I'm going to get some rubber hose and see if I can narrow down the sound. Any of you heard anything like this? first, no, it's NOT an accessory belt/pulley issue. I removed the belt and the sound was unchanged. I hooked the belt back up to circulate water with the pump after trying it without a belt. Details are: stock 5.9L block, stock cast crank, new rods, new pistons, everything balanced together, edelbrock heads, and 1.6 adjustable roller rockers from Hughes. cam is 220/230 @ .050 114 LSA, hardened pushrods. I didn't notice the sound initially, had some isues on first fire-up with the headers getting hot and starting to glow faintly, looked at cam timing and found it was 6 degrees retarded (never again will I just line up the dots!!!) advanced it with a different timing set and 2 degree key so it's now at 110installed centerline the way the cam card says it should have been originally. noticed the sound after I got the rockers re-set and started the engine back up. pulled the distributor out and spun it around, it feels fine, smooth, no squeeks when spun by hand. pulled oil pump drive shaft and it looks normal, wear marks are dead center on the teeth of the gear, and the bronze bushing in the block looks ok, so I don't think thats worn and causing mis-alignment issues. tomorrow I'll pull the crank position sensor and check it just to be sure it hasn't moved and is rubbing on the flexplate, maybe kill a cylinder at a time and remove intake/exhaust to see if it goes away with any one cylinder, run a compression test, leak down test, and see where I'm at. if I can't find anything, I'll probably be pulling the intake for a visual inspection, and probably take the timing cover back off again. any ideas on what this sound might be? aside from the roller cam and rocker arms, the internals to this engine are the same as all the other LA small blocks out there. http://youtu.be/oYVDffxuduk
**Photobucket sucks**
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Re: ever hear a sound like this?
[Re: 340B5]
#1186553
02/26/12 06:15 PM
02/26/12 06:15 PM
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Joined: Jan 2005
Posts: 866 Winnipeg ,Mb. CA.
chryco
super stock
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super stock
Joined: Jan 2005
Posts: 866
Winnipeg ,Mb. CA.
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Your rocker shafts aren`t installed right and the sound is the rockers.
Gas is fer washin' parts ....Alky`s fer drinkin' ...Nitro`s fer Racin'!
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Re: ever hear a sound like this?
[Re: 340B5]
#1186555
02/26/12 06:25 PM
02/26/12 06:25 PM
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Joined: Apr 2005
Posts: 1,509 TN
SCATPACK 1
pro stock
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pro stock
Joined: Apr 2005
Posts: 1,509
TN
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I thought rocker too. Can u pull a VC and try it to see if it is louder. Then try the other vc
Old Geezer Racing
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Re: ever hear a sound like this?
[Re: SCATPACK 1]
#1186557
02/26/12 06:34 PM
02/26/12 06:34 PM
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Joined: Oct 2003
Posts: 21,345 Marysville, O-H-I-O
70Cuda383
OP
Too Many Posts
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OP
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Joined: Oct 2003
Posts: 21,345
Marysville, O-H-I-O
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I'll check the rockers, I THOUGHT I remember seeing oil flying everywhere when I had it running -- I actually set the valve lash with it running, based on the advice of a lot of the other Dakota guys, got the stuff close enough to run, then as it was running, tightened down the lash and locked it up solid. I sure hope it is just the rockers somewhere though, those are easy and right up on top! the bronze distributor bushing looked good when I looked at it with a flashlight through the hole in the block, and like I said about the distributor/oil pump drive gear, the gear mesh pattern was right in the middle of the teeth, so I don't think the bushing is worn out causing slop there, otherwise the gears wouldn't be meshing properly, right? these are the rockers I'm running: http://www.hughesengines.com/Index/produ...mp;partid=25423also appear to be the same as these cheap chevy rocker arms for $100 less: http://www.ebay.com/itm/SBC-GM-350-Chevy...ecc&vxp=mtr
Last edited by 70Cuda383; 02/26/12 06:42 PM.
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Re: ever hear a sound like this?
[Re: SCATPACK 1]
#1186558
02/26/12 06:39 PM
02/26/12 06:39 PM
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Joined: Nov 2010
Posts: 914 tn
robnbird
super stock
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super stock
Joined: Nov 2010
Posts: 914
tn
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Quote:
I thought rocker too. Can u pull a VC and try it to see if it is louder. Then try the other vc
sounds like a rocker but did you take all of your belts off first just to see if that stops the noise. I have heard water pump brgs make that noise also.
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Re: ever hear a sound like this?
[Re: VernMotor]
#1186566
02/26/12 08:23 PM
02/26/12 08:23 PM
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Joined: Mar 2003
Posts: 2,540 PA
moparacer
master
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master
Joined: Mar 2003
Posts: 2,540
PA
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Did you pull the belt off and try it?
I swear I have had idler pulleys screech just like that.
67 Barracuda street/bracket car 11.27-119 68 Dart 502 BB 8.70s-152 414 cid SB Dragster 7.65-174
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