I do get the idea and i have read everything from https://www.fiero.nl/forum/Forum2/HTML/095393.html my balancer does not have marks on it for some reason or another. is it reasonable to say just use the distributor for my TDC? and is it ok since the timing on the car is 1-3-4-2 that i can adjust them in this order?
When you seat the rocker is it 3/4 to 1.5 turns AFTER the rocker is snug to the push rod and the valve top? or is there an actual torque rating? I'm going to attempt this tomorrow as i need the car monday. Thank you.
i put them all down at the same time at 24 (and suddenly i have a tapping noise that i didn't have before) but from what i've been reading they have to be done one cylinder at a time. so which is it?
Yes, both at the same time at TDC. The FSM says "with lifter on base circle of camshaft", 24 lb/ft of torque. Using the dist to find TDC on #1 is fine. Just make sure both valves stay closed as you tighten the rocker.
I put some washer shims in with the rockers and they seemed to act as lash reducer. My engine is a good deal quieter now. Actually, it used to sound like a diesel and now it just sounds like an engine right behind the cabin. They go under the bolt heads and push the rocker down just a touch. I was not worried experimenting but hey it's only a car. Worked for my 84 but my situation I.E. push rod condition wear etc is particular and may not match yours etc.... Got them from ACE for 10 cents each, called "machine bushings", has got to be the easiest cheapest mod I ever did. KurtAXX had the idea, I worked out the application. I was thinking of filing down the stump which would also work. Turns out the design of the lifters is not very effective and can use a little help.
------------------ 84 Duke, Holley TBI, Manual Trans 4.10, CompuCam, White
[This message has been edited by White 84 SE (edited 04-04-2010).]
IP: Logged
12:03 AM
Patrick Member
Posts: 36446 From: Vancouver, British Columbia, Canada Registered: Apr 99
Yes, both at the same time at TDC. The FSM says "with lifter on base circle of camshaft", 24 lb/ft of torque. Using the dist to find TDC on #1 is fine. Just make sure both valves stay closed as you tighten the rocker.
If I was wrong to say "do 'em all at once" I apologize. However, if there's no adjustment to be made (basically the bolt is just being tightened down), what's the difference?
IP: Logged
12:22 AM
Finally_Mine_86_GT Member
Posts: 4809 From: Hyde Park, New York Registered: Sep 2006
I understand as to why each cylinder has to be at TDC when you torque them. If it's not at TDC the the rocker and push down on the spring and cause an inaccurate seating due to the springs resistance added with the bolt tightness. Thank you guys. Let you know how it works when i can get to it later today.
IP: Logged
07:35 AM
Patrick Member
Posts: 36446 From: Vancouver, British Columbia, Canada Registered: Apr 99
If it's not at TDC the the rocker and push down on the spring and cause an inaccurate seating due to the springs resistance added with the bolt tightness.
???
IP: Logged
02:46 PM
KurtAKX Member
Posts: 4008 From: West Bloomfield, MI Registered: Feb 2002
On a completely stock 2.5, the valve train is non-adjustable and you can hit all 8 of them at the same time. It makes no difference at all. I have always done all 8 without rolling the motor over.
IP: Logged
03:35 PM
PFF
System Bot
White 84 SE Member
Posts: 812 From: Chicago, Illinois USA Registered: Nov 2008
On a completely stock 2.5, the valve train is non-adjustable and you can hit all 8 of them at the same time. It makes no difference at all. I have always done all 8 without rolling the motor over.
Kurt, remember when you suggested that I simply use washers instead of filing down my rocker standoffs when I was trying to quiet my Duke? It worked buddy. Ogre agreed that it was a useful mod after doing a little research on the lifter choice GM made. The Thread was called...Quieting the Duke...or something.
------------------ 84 Duke, Holley TBI, Manual Trans 4.10, CompuCam, White
