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03-17-2007, 05:54 PM
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#1 |
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Registered User
 
Join Date: Sep 2006
Location: Hendersonville, TN
Posts: 1,528
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noisy rocker
I'm not new to turning wrenches, but I am new to diagnosing problems with engines. My rockers are noisy. I think it is on the #5 cylinder. I pulled the valve cover off, but can't tell anything. What could be the problem? Thanks.
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BRENT  -'68 Stepside Project -'98 Z71 Daily Driver -Enough extra parts to build another truck and a half |
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03-17-2007, 06:32 PM
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#2 |
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67 shorty
Join Date: Feb 2007
Location: Graham,Wa.
Posts: 190
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Re: noisy rocker
If you have a 307. Replace the cam. But you can tighten it
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67 SWB with enough parts to build two 
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03-17-2007, 07:12 PM
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#3 |
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Registered User
Join Date: Sep 2006
Location: Hendersonville, TN
Posts: 1,528
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Re: noisy rocker
It's a 305 by the way. Guy said it had a comp cam in it. Engine is a fresh rebuild. Am I looking at a new camshaft or what?
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BRENT -'68 Stepside Project -'98 Z71 Daily Driver -Enough extra parts to build another truck and a half |
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03-17-2007, 09:14 PM
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67 shorty
Join Date: Feb 2007
Location: Graham,Wa.
Posts: 190
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Re: noisy rocker
I would adjust the lifters(all) and if it seems to run good,your OK.
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67 SWB with enough parts to build two
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03-17-2007, 09:14 PM
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#5 |
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GEARHEAD
Join Date: Jan 2007
Location: CENTRAL,PA
Posts: 2,284
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Re: noisy rocker
Could just be out of adjustment. Would go that route and check them all while your at it just to make sure they are all in adjustment. If new cam was installed and they reused rocker nuts they could be worn out. This would make this a re accuring problem. If you are worried about cam lobe being worn when turing engine over by hand watch that particular rocker to see if it has the sme amount of movement. RJ22
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03-17-2007, 09:21 PM
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#6 |
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Registered User
Join Date: Sep 2006
Location: Hendersonville, TN
Posts: 1,528
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Re: noisy rocker
Can you tell me how to go about adjusting them? Thanks. I really appreciate the help.
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BRENT -'68 Stepside Project -'98 Z71 Daily Driver -Enough extra parts to build another truck and a half |
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03-17-2007, 09:29 PM
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#7 |
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GEARHEAD
Join Date: Jan 2007
Location: CENTRAL,PA
Posts: 2,284
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Re: noisy rocker
http://67-72chevytrucks.com/vboard/s...d.php?t=225820
Scroll down to the area on this Post #14 in thread. This is when installing a new cam but proceder is the same just start out at TDC compression stoke. GR8 tech. RJ22
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Last edited by RACINJASON22; 03-17-2007 at 09:33 PM. |
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03-18-2007, 02:14 PM
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#8 |
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Registered User
Join Date: Sep 2006
Location: Hendersonville, TN
Posts: 1,528
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Re: noisy rocker
Hate to sound like a total newbie here, but...I read the section on adjusting the rockers. Great info. But could you explain exactly what "lash" is? I know I've heard it before, but when I got to thinking about it, I wasn't sure I could recognize it. Thanks.
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BRENT -'68 Stepside Project -'98 Z71 Daily Driver -Enough extra parts to build another truck and a half |
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03-18-2007, 03:17 PM
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Dave's not here, man
Join Date: Jun 2004
Location: Winder, Georgia
Posts: 2,000
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Re: noisy rocker
I believe lash is the vertical movement of the pushrod. As you tighten down the rocker nut, you can turn the pushrod with your fingers and as it starts to drag slightly you are near/at zero lash. Don't overtighten it, though.
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- 2014 VW Jetta - 2015 VW Jetta - 1966 Ford F-250 |
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03-18-2007, 04:30 PM
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#10 |
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Registered User
Join Date: Sep 2006
Location: Hendersonville, TN
Posts: 1,528
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Re: noisy rocker
Thanks again.
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BRENT -'68 Stepside Project -'98 Z71 Daily Driver -Enough extra parts to build another truck and a half |
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