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Re: Name that noise!
bigfunsixone #1329228 Tue Oct 08 2019 03:34 PM
Joined: Nov 1995
Posts: 4,654
J
Unrepentant VW Lover
Don, Team SimS already called that one. You can join with them if you like or ask them to grant you the rod bearing specifically. For extra points, you could specify which rod.


John
"There is a life about to start
When tomorrow comes..."


'49 Chevrolet 3804

Re: Name that noise!
bigfunsixone #1329233 Tue Oct 08 2019 04:08 PM
Joined: Apr 2005
Posts: 9,026
Grease Monkey, Moderator General Truck Talk & Greasy Spoon
Broken rocker shaft.šŸ› 


Martin
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Re: Name that noise!
bigfunsixone #1329234 Tue Oct 08 2019 04:10 PM
Joined: Mar 2007
Posts: 799
T
Shop Shark
Tuts59 respectfully asks permission to join Team Jerry, I believe it is a Main Bearing as well (rear main specifically for extra points.)


Craig

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Re: Name that noise!
bigfunsixone #1329240 Tue Oct 08 2019 05:49 PM
Joined: Mar 2010
Posts: 9,446
5
Master Gabster
Troubleshooting 101.
Start with the easy to test components.
Pulling a valve cover qualifies as easy.

Re: Name that noise!
bigfunsixone #1329255 Tue Oct 08 2019 08:51 PM
Joined: Aug 2001
Posts: 4,401
2
Shop Shark
OK Grand Pooh Bear.
My Heartland Bolter vote is for the #5 or #6 rod bearing.
SimS is too wide open to join that team so I want to enter our own precise entry.
A 3' piece of 1/2 inch wood dowel, will tell you what cylinder it's on.

Don


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Re: Name that noise!
bigfunsixone #1329257 Tue Oct 08 2019 09:33 PM
Joined: Mar 2002
Posts: 9,030
Master Gabster
If it is a main bearing, loading it at a low RPM will bring it out pretty clearly.

I think the high tech approaches that were mentioned are probably in use these days on new equipment where the expected sounds are known and don't deviate too much. I know auto engineers can use sensors to nail down noises and the exact timing as to which cylinder and during which part of the cycle it is happening,.

Last edited by truckernix; Tue Oct 08 2019 09:36 PM.

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Re: Name that noise!
bigfunsixone #1329271 Tue Oct 08 2019 10:49 PM
Joined: Jan 2013
Posts: 1,662
S
Shop Shark
If I win, I will make my early donation to the stovebolt forum, still sounds like air and exhaust mixing (sticky valve bad cam)but Jerry is an oak. I'd like to hear what 235 Dave has to say

Last edited by sstock; Tue Oct 08 2019 10:49 PM.

1953 Chevrolet 3100
261 cu inch, sm420, 3.55 rear, torque tube still,omaha orange, still 6 volt, RPO green glass, side carrier spare, all done
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Re: Name that noise!
bigfunsixone #1329281 Wed Oct 09 2019 12:19 AM
Joined: Aug 2012
Posts: 1,742
V
Shop Shark
Timing is too advanced.....

Re: Name that noise!
bigfunsixone #1329343 Wed Oct 09 2019 01:54 PM
Joined: Nov 1995
Posts: 4,654
J
Unrepentant VW Lover
New Teams!! But I think we need a ruling on Team sstock -- can "bad/sticky valve" be the same as "bad cam" or are those two separate issues? If two separate issues, we can only have one entry per team.

1. Team Apachefiend -- Exhaust Leak (Needs more specificity to differentiate between you and Team Two)
2. Team Lightholder's Dad -- Exhaust manifold Leak (Unless you want to join Apachefiend's team ...)
3. Team SStock -- Bad/sticky Valve
4. Team SimS -- Piston/rod/wrist pin
5. Team Jerry -- Main Bearing (Tuts59 and I are with Jerry)
6. Team Volfandt -- Timing
7. Team Heartland -- #5 or #6 Rod Bearing
8. Team Martin -- Rocker Shaft


John
"There is a life about to start
When tomorrow comes..."


'49 Chevrolet 3804

Re: Name that noise!
bigfunsixone #1329367 Wed Oct 09 2019 08:25 PM
Joined: Feb 2011
Posts: 902
R
Shop Shark
Have you removed 1 spark plug wire at a time with the engine running? If it is a rod bearing or piston slap the noise won't be as pronounced. Did you take a compression check?

Rick

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