valve adjustment question
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Lead Driver
Joined: Mar 2008
Posts: 7,193
Likes: 385
From: Near Los Angeles
valve adjustment question
My rocker studs have been changed to screw-in type. So, when adjusting the valves, I tighten to zero lash, and then 1/4 turn more.
But Abandoned Bronco called me on something, and forced me to re-read the Chilton manual. There it states to tighten until the p.rod can not be turned! and then a full turn more!!! Am I crazy? Or does that not seem super tight.
I have tried tightening 1/2 turn after zero lash (which I was taught was when you could feel resistance when rolling p.rod between fingers). My supposedly noiseless Isky lifters really click on morning start up. Could that be the cause? or wouldn't they click all the time if loose?
These are the same lifters (kept in order) I had in the first engine when something went through the oil and wiped out the bearings. Maybe they got clogged then?
But Abandoned Bronco called me on something, and forced me to re-read the Chilton manual. There it states to tighten until the p.rod can not be turned! and then a full turn more!!! Am I crazy? Or does that not seem super tight.
I have tried tightening 1/2 turn after zero lash (which I was taught was when you could feel resistance when rolling p.rod between fingers). My supposedly noiseless Isky lifters really click on morning start up. Could that be the cause? or wouldn't they click all the time if loose?
These are the same lifters (kept in order) I had in the first engine when something went through the oil and wiped out the bearings. Maybe they got clogged then?
Posting Guru
Joined: May 2007
Posts: 1,208
Likes: 2
From: North Reading Mass
If they were loose yes they would click all the time. Lifter noise at start up is usually because the the anti drain back valve on the oil filter has failed. If your not already use a Motorcraft or Purolater filter.
regards
rikard
regards
rikard
Laughing Gas
Joined: Nov 2003
Posts: 898
Likes: 1
From: southeren Oh
My rocker studs have been changed to screw-in type. So, when adjusting the valves, I tighten to zero lash, and then 1/4 turn more.
But Abandoned Bronco called me on something, and forced me to re-read the Chilton manual. There it states to tighten until the p.rod can not be turned! and then a full turn more!!! Am I crazy? Or does that not seem super tight.
I have tried tightening 1/2 turn after zero lash (which I was taught was when you could feel resistance when rolling p.rod between fingers). My supposedly noiseless Isky lifters really click on morning start up. Could that be the cause? or wouldn't they click all the time if loose?
These are the same lifters (kept in order) I had in the first engine when something went through the oil and wiped out the bearings. Maybe they got clogged then?
But Abandoned Bronco called me on something, and forced me to re-read the Chilton manual. There it states to tighten until the p.rod can not be turned! and then a full turn more!!! Am I crazy? Or does that not seem super tight.
I have tried tightening 1/2 turn after zero lash (which I was taught was when you could feel resistance when rolling p.rod between fingers). My supposedly noiseless Isky lifters really click on morning start up. Could that be the cause? or wouldn't they click all the time if loose?
These are the same lifters (kept in order) I had in the first engine when something went through the oil and wiped out the bearings. Maybe they got clogged then?
THe part about the push rod not turning with your fingers depends on if the lifter are full of oil.
If they are out directly "of the box" then when you hit zero lash you will only feel a slight increase in resistance in turning the push rod.
You will find the no turn spot when you run out of plunger travel in the lifter.
If they are full of oil they will not turn with your fingers.
Postmaster
Joined: Mar 2005
Posts: 2,949
Likes: 6
From: Earth
^^^ What he said. If you pump up new hydraulic lifters with oil they feel almost like a solid lifters. Already run lifters should feel pretty much the same way. Can't say for sure on a six, but on SBFs I've cracked open they turn by hand but it takes a pretty good pinch and torque.
FTE Legend
Joined: May 2008
Posts: 56,542
Likes: 0
From: In my own world
if I try to adjust the valves like the book says on my 82, it opens the valve. the way you are adjusting is how mine is. you and I have talked about you using the motorcraft filter before, but you are a "learn by doing" kind of guy.
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Lead Driver
Joined: Mar 2008
Posts: 7,193
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From: Near Los Angeles
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