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Noise at upper intake 454 Vortec. Pics and vid of noise...

 
TonyMiller
I love my Chevy Chevette!
Posts: 12
Joined: 07/09
Posted: 08/01/09 08:14 PM

The noise is on the drivers side. I replaced a lifter I thought it was and nothing. It did quiet down when I pushed on this lifter with a handle I thought. I sprayed around the upper intake for leaks and found nothing. Oil pressure is good. It's not the belt as I originally thought it was when I bought the car (I replaced that too). The area I hear the noise from the most when listening through a stick is shown in the pictures. It's heard in the upper intake. The video has the sound it's making. It sounds best towards the end as I moved to the drivers side. Thanks for any ideas.... Confused

1997 Chevy Suburban 2500 LT 4X4
454 Vortec (J CODE)

VIDEO:
http://www.youtube.com/watch?v=tSxAqEUQIU4

PICTURES:
http://i492.photobucket.com/albums/rr287/awmillerbrightnet/454issue1.jpg

http://i492.photobucket.com/albums/rr287/awmillerbrightnet/454issue2.jpg  
Trying To Learn...

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horror
I love my Chevy Chevette!
Posts: 9
Joined: 07/09
Posted: 08/02/09 02:37 AM

Hi,

Don't know this engine, but does it look like an '72 454?
I also had a ticking noise, replaced belts, waterpump, adjusted the pushrods a few times (I assume you adjusted the pushrod since you replaced the lifter)
anyhow, finally I found it, the ignition distributor cap had a loose contact in it, which was hitting the rotor of the ignition, and I would swear it was in the engine Smile
When the engine was running, I checked the sparkplug cables and suddenly the noise was gone when I checked the connections on top of the distributorcap, that's how I found it....
Maybe you have the same problem??
Good luck.  

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waynep712
I have an SS396 tatoo
Posts: 264
Joined: 01/08
Posted: 08/02/09 05:10 PM

i wonder if the hissing noise is the idle air bypass motor .... just bypassing a bunch of air past the throttle body..

i really don't like the lifter noise...   sounds like the cam is starting to go flat...

it still could be the fuel injectors...  

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goughfarms
I love my Chevy Chevette!
Posts: 2
Joined: 12/09
Posted: 12/23/09 01:24 PM

Have 98 chevy silverado 3500 4x4 with 454 vortec 170000 miles making what seems to be the same nosie as in your video only sounds as if it comes from the passenger side.

would like to know what would cause this and what needs to be done.  

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papacharlie
My first time was in a Chevy
Posts: 223
Joined: 12/09
Posted: 12/28/09 10:46 PM

did you check the push rods for rubbing or the rocker arms? looking at the location in the pics, and listening to the vid, it make me think it might be a rocker arm ball on the intake valve in that area. i'd check the rocker arms and spring retainers for any signs of contact where it's not supposed to. see if the ball is blue from heat also.  

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tuffnuff
Moderator
Posts: 7841
Joined: 12/09
Posted: 12/29/09 02:47 AM

+1
good point,
The exhaust runs hotter
it's worth a look see

Smile  
When The Flag Drops.,.

tuffnuff

The Bull ***t Stops.,.
tuffnuff

P. Engineer, Engine Builder

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Pontiacman2
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Posts: 8956
Joined: 09/08
Posted: 12/29/09 06:03 AM

+2  
Pontiacman2
Pontiacman2

Professional Hi-performance engine builder

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chevelle83
I mow my lawn and find Chevys
Posts: 2280
Joined: 11/09
Posted: 12/29/09 07:21 AM

If you take it apart again put a straight edge across the valve stems to see if the valve is sticking up higher than the other valves I wonder if the seat is worn out causing the noise.  You can do a compression test to check this to.  

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tuffnuff
Moderator
Posts: 7841
Joined: 12/09
Posted: 12/29/09 08:26 AM

A piece of garden hose held to the ear and the other end as a probe to find the exact location and source of the noise might work,,,
As a last resort a tear down would be in order

Smile  
When The Flag Drops.,.

tuffnuff

The Bull ***t Stops.,.
tuffnuff

P. Engineer, Engine Builder

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idrivejunk
I mow my lawn and find Chevys
Posts: 5119
Joined: 12/09
Posted: 12/29/09 09:33 AM

I use a $4 stethoscope for this kinda thing...

Sounds an awful lot like a loose rocker, does it miss? Maybe double check that lifter installation. Does this thing have roller lifters?

A new or old lifter would tick if the pushrod was bent or the rocker stud began to back out. Are the rocker nuts adjustable?

Have you taken a vacuum guage reading?  

Sometimes old or seldom used lifters stick in the bore. Marvel Mystery Oil in the crankcase oil has quieted those for me in the past. Sometimes exhaust leaks sound like a metallic click, too. Just throwing out ideas. Smile  
idrivejunk

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tuffnuff
Moderator
Posts: 7841
Joined: 12/09
Posted: 12/29/09 09:37 AM

+1
morning id Smile

Smile  
When The Flag Drops.,.

tuffnuff

The Bull ***t Stops.,.
tuffnuff

P. Engineer, Engine Builder

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Pontiacman2
Moderator
Posts: 8956
Joined: 09/08
Posted: 12/29/09 09:41 AM

+2  
Pontiacman2
Pontiacman2

Professional Hi-performance engine builder

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tuffnuff
Moderator
Posts: 7841
Joined: 12/09
Posted: 12/29/09 09:48 AM

+3
What,,, now we're all doctors runnin around with stethoscopes around our neck.
dressed in a white,,,
Schmuck

Smile  
When The Flag Drops.,.

tuffnuff

The Bull ***t Stops.,.
tuffnuff

P. Engineer, Engine Builder

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idrivejunk
I mow my lawn and find Chevys
Posts: 5119
Joined: 12/09
Posted: 12/29/09 10:22 AM

Hey! I actually got plusses on an engine-related thread! Who knew? Cool

Lemme get my...schmuck on!  
idrivejunk

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tuffnuff
Moderator
Posts: 7841
Joined: 12/09
Posted: 12/29/09 10:30 AM

you schmuck,,, Dr. id
LOL
there you go, your input is appreciated cuz every lil bit counts,,,
in a good recipe

Smile  
When The Flag Drops.,.

tuffnuff

The Bull ***t Stops.,.
tuffnuff

P. Engineer, Engine Builder

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