Will bent rocker cause tapping?

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Dec 24, 2008 | 11:18 PM

Vicinity

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From: FL

Will bent rocker cause tapping?

Will a bent rocker cause a loud tapping (and by loud, I mean a car with true duals next to me cannot hide it)... my mechanic believes thats the reason, so I figure if it is, I'll do a swap for a new set I found on Summit.

Also, is there any advantage to upgrading them? I might do H/C later, so...

Dec 25, 2008 | 04:34 AM

the_merv

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From: The Beach...

Could be a Lifter..

Dec 25, 2008 | 06:41 AM

Vicinity

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From: FL

Quote:

Originally Posted by the_merv

Could be a Lifter..

Well, would it be worth it to replace them as well?

Dec 25, 2008 | 05:15 PM

97blackz28

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From: Chicago Suburbs

if you going to do the lifters you might as well do the head swap you said you were thinking about, because the heads have to come off to do the lifters.

Dec 25, 2008 | 05:32 PM

EDS01SS

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i highly doubt you have a bent rocker arm and its slightly possible that its a dead lifter but its a very good possibility that you have a bent pushrod.

Dec 25, 2008 | 06:17 PM

want297z

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I agree on the pushrod. Are they still stock ones?

Dec 25, 2008 | 06:51 PM

Vicinity

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From: FL

Quote:

Originally Posted by want297z

I agree on the pushrod. Are they still stock ones?

As far as I know. I just had my Dad look at it, he thinks its a lifter, he's worked on Harley engines for the past 20 years...

How much more difficult is it to fix a pushrod?

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Dec 26, 2008 | 05:59 PM

97blackz28

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From: Chicago Suburbs

pushrods are much easier than lifters. do what it says above, should take no more than 30 minutes to get PRs out.

Dec 26, 2008 | 08:02 PM

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vettenuts

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From: Little Rhody

Keep them in order and in top/bottom orientation for re-installation. If you know where the noise is, then just pull that one and the ones on either side of it to start with. Usually caused by an over-rev, miss any shifts lately?

Dec 26, 2008 | 10:48 PM

#11

Vicinity

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From: FL

Quote:

Originally Posted by vettenuts

Never, but the previous owner autocrossed it, so he might have. It pops out of third all the time, but I think that's a tranny issue.

It's coming from the driver side, or atleast, its louder over there. I might try this tomorrow.

Dec 27, 2008 | 01:47 PM

#12

Vicinity

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From: FL

Quote:

Originally Posted by the_merv

Pull the Coils, Valve Covers, and all the Rockers, then take all of them out and start looking at them. I just put all them on a Table, and see which ones roll wierd.

What about the gasket? Will the valve cover leak anything? Can I just pull it apart and reinstall it? What about oil?

Dec 27, 2008 | 01:53 PM

#13

WS6_00

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From: NM, 6-8,000DA land :(

put a tad bit of oil on the pushrods when installing them back in, it will help them not to be so noisy when you start it up after the install.

Dec 27, 2008 | 03:11 PM

#14

Vicinity

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From: FL

Quote:

Originally Posted by Vicinity

What about the gasket? Will the valve cover leak anything? Can I just pull it apart and reinstall it? What about oil?

Bump. I need an answer, I want to check today.

Dec 27, 2008 | 06:52 PM

#15

dyls1

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Quote:

Originally Posted by Vicinity

Bump. I need an answer, I want to check today.

the valve cover gaskets are reusable

Dec 27, 2008 | 06:57 PM

#16

Vicinity

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From: FL

Quote:

Originally Posted by dyls1

the valve cover gaskets are reusable

So I can just pop them off, inspect and put right back together and everything will be just as it was? (assuming I do it right)

Dec 27, 2008 | 07:59 PM

#17

vettenuts

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From: Little Rhody

Quote:

Originally Posted by Vicinity

So I can just pop them off, inspect and put right back together and everything will be just as it was? (assuming I do it right)

Yes, worst case if the gasket is bad (they are rubber and most times re-usable) you will need to replace later. Not as big a deal as running with your current issue. There is also a removal and re-installation procedure for the rockers. Here is the GM re-installation procedure.

Dec 27, 2008 | 08:34 PM

#18

Vicinity

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From: FL

Oh, thanks man!

How do I rotate the crankshaft?

Dec 28, 2008 | 08:08 AM

#19

vettenuts

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From: Little Rhody

See if you can get a 24mm wrench on it. Not familiar with the f-body as I have a Vette. In the Vette, the rack sits right in front of the pulley and you are limited to what you can get in there. Having the plugs out will help when its time to turn it. To find TDC, watch for the #1 intake to close and then bring the piston to the top.