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Will bent pushrods cause knock retard after 4krpm?

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Old 01-02-2002, 03:46 PM
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JC
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Default Will bent pushrods cause knock retard after 4krpm?

I'm trying to hunt down KR. Everything on the Atap is rich yet, KR pops up around 4k.

The car is at the exhaust shop now, getting everything tightened up. I'm thinking about pulling the pushrods this weekend. Since I hear slight ticking. Can the pushrods be a suspect?
Old 01-02-2002, 06:17 PM
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Default Re: Will bent pushrods cause knock retard after 4krpm?

my car is doing the same thing but it is above 5k. what does your timing drop down too? Mine is dropping all the way down to 10 degrees <img src="gr_sad.gif" border="0">
Old 01-02-2002, 06:48 PM
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Default Re: Will bent pushrods cause knock retard after 4krpm?

having the same KR problem at 4500 rpm's after installing my thunder racing cam. ?????? I am confused.
Old 01-02-2002, 07:28 PM
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Default Re: Will bent pushrods cause knock retard after 4krpm?

JC, what is your sig?

I have FLP's with severe KR above 5K , <img src="gr_images/icons/mad.gif" border="0"> and am getting ready to send it to the exhaust shop to tighten up the exhaust as well.
Old 01-03-2002, 07:38 AM
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Default Re: Will bent pushrods cause knock retard after 4krpm?

Viper,

Here is my sig. I have a 00ZM6 and the KR problem car is my wife's 98TA A4


Well the exhaust is tightened but it aint the prob. <img src="gr_sad.gif" border="0"> I noticed that I didn't get KR until the car shifted (roughly I might add) A fluid/filter change will happen today to help the rough shifting. I will check the LCAs this weekend. I think it is false knock.

[ January 03, 2002: Message edited by: JC ]</p>
Old 01-03-2002, 11:58 AM
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Default Re: Will bent pushrods cause knock retard after 4krpm?

Geez, y'all, this talk of bent pushrods 'n broken valve springs (two topics on it in this forum alone) is startin' to worry me a bit!

Is this a reliability issue with stock LS1's, or does the valvetrain not respond well to engine mods?
Old 01-03-2002, 02:05 PM
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Default Re: Will bent pushrods cause knock retard after 4krpm?

Ooooh crap... <img src="gr_eek2.gif" border="0">

(thanks, Red)
Old 01-04-2002, 12:22 AM
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Default Re: Will bent pushrods cause knock retard after 4krpm?

The drivetrain does not respond well to missed shifts. Most of the people with bent pushrods and valves are M6 guys missing shifts. The A4 guys <img src="gr_images/icons/wink.gif" border="0"> dont seem to have this problem.

Gary



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