Valvetrain Question

306bullet · 09-11-2003, 07:03 PM

I have a 306 w/ AFR185's. I am running a .560" lift cam. I had my "machine work guy" check assembled height, valve clearance, pushrod lenght etc. He said it all was great! I have put about 200 miles on the new motor. The other day, I had some serious valvetrain chatter. I pulled the valve covers and found the intake pushrod almost out from underneath the roller rocker. The perma-loc was finger loose. I am guessing that I missed one when tightening them up?
My question is this, I am running a stock length pushrod (6.25"). Do you think that this sounds right? AFR, along with most other aftermarket head companies, recommends a little longer pushrod. I would like some input on what you might recommend.

Thanks Brent

fiveOguy20 · 09-11-2003, 07:48 PM

i would recommend calling the cam manufacture an ask them cuz the cam base circle is what determines pushrod length. good luck

09-11-2003, 07:03 PM	#1
306bullet Registered Member Join Date: Jul 2002 Location: Indiana Posts: 51	Valvetrain Question I have a 306 w/ AFR185's. I am running a .560" lift cam. I had my "machine work guy" check assembled height, valve clearance, pushrod lenght etc. He said it all was great! I have put about 200 miles on the new motor. The other day, I had some serious valvetrain chatter. I pulled the valve covers and found the intake pushrod almost out from underneath the roller rocker. The perma-loc was finger loose. I am guessing that I missed one when tightening them up? My question is this, I am running a stock length pushrod (6.25"). Do you think that this sounds right? AFR, along with most other aftermarket head companies, recommends a little longer pushrod. I would like some input on what you might recommend. Thanks Brent

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09-11-2003, 07:48 PM	#2
fiveOguy20 Registered Member Join Date: Sep 2002 Posts: 156	i would recommend calling the cam manufacture an ask them cuz the cam base circle is what determines pushrod length. good luck