Rockers

dark horse · 02-26-2000, 09:33 PM

My car had a tapping rocker and I pulled the valve cover and tightened them down so they werent moving. My engine is a 68 289 2v. My shop manual says that I should set each cylnder that I am adjusting to TDC but I didnt do that. I think the rockers are positive stop non adjusting on the 289 2v. Was just tightening the studs until they dont move all I had to do?

I hope I didnt mess my engine up. It supprisingly runs a lot smoother now.

------------------
1968 coupe

Lou Lyman · 02-27-2000, 07:01 PM

I looked at your entry in Users Rides which
lists your engine as a stock 289 2v. It should have hydraulic lifters. Turn engine by hand until the piston is at TDC on compression stroke. Adjust rocker untill all play is removed from the push rod (twisting the pushrod helps). Then turn adjusting nut 1 and 1/2 more turns. Repeat for all cylinders. Hope you havn't damaged anything. Good Luck, Lou

John Z · 02-28-2000, 10:53 PM

Unless you are at TDC on the compression stroke, there can be compression in the valve springs that inhibits testing if the push rods are tight when you tighten the retainer nuts. So there is a chance that without having the piston at TDC, your rockers are too loose. I do not think this would cause permanent damage if you haven't driven much. Pull the valve cover and use the TDC procedure.

Dark Knight · 03-01-2000, 01:30 PM

easy to tell, if they are positive stop.. the stud and the nut will be beveled..and those you just torque down.. cant remember the specs now..

------------------
84 convt,'95 302, performer
3.55's, underdrives shorties
14.49@94,2.03 60ft
and a '68 stang that WAS nasty ;-)
MY ride
MY ride2

02-26-2000, 09:33 PM	#1
dark horse Registered Member Join Date: Apr 1999 Location: Wilkes-Barre, PA 1968Mustang Posts: 188	Rockers My car had a tapping rocker and I pulled the valve cover and tightened them down so they werent moving. My engine is a 68 289 2v. My shop manual says that I should set each cylnder that I am adjusting to TDC but I didnt do that. I think the rockers are positive stop non adjusting on the 289 2v. Was just tightening the studs until they dont move all I had to do? I hope I didnt mess my engine up. It supprisingly runs a lot smoother now. ------------------ 1968 coupe

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02-27-2000, 07:01 PM	#2
Lou Lyman Registered Member Join Date: Dec 1998 Location: Tampa, FL Posts: 70	I looked at your entry in Users Rides which lists your engine as a stock 289 2v. It should have hydraulic lifters. Turn engine by hand until the piston is at TDC on compression stroke. Adjust rocker untill all play is removed from the push rod (twisting the pushrod helps). Then turn adjusting nut 1 and 1/2 more turns. Repeat for all cylinders. Hope you havn't damaged anything. Good Luck, Lou

02-28-2000, 10:53 PM	#3
John Z Registered Member Join Date: Feb 1999 Posts: 102	Unless you are at TDC on the compression stroke, there can be compression in the valve springs that inhibits testing if the push rods are tight when you tighten the retainer nuts. So there is a chance that without having the piston at TDC, your rockers are too loose. I do not think this would cause permanent damage if you haven't driven much. Pull the valve cover and use the TDC procedure.

03-01-2000, 01:30 PM	#4
Dark Knight Registered Member Join Date: Oct 1998 Location: Az Posts: 854	easy to tell, if they are positive stop.. the stud and the nut will be beveled..and those you just torque down.. cant remember the specs now.. ------------------ 84 convt,'95 302, performer 3.55's, underdrives shorties 14.49@94,2.03 60ft and a '68 stang that WAS nasty ;-) MY ride MY ride2