adjusting valve train
Thread Starter
|
Lead Driver
Joined: Apr 2001
Posts: 6,175
Likes: 21
From: Texas
adjusting valve train
Is there a quick way to adjust the rockers?
I mean, if I see that the intake is full open on cylinder A, is it easy to say that cylinders x,y and z are closed and can be adjusted?
I want to adjust evreything tonight, before dropping the truck off tomorrow for dyno tuning the Demon carb. He reccomended torquing the adjusting screw to 18ft-lbs instead of trying to measure the lash or guesstimating turns after the pushrod stops spinning loosely. I'd rather not turn the crank to adjust each valve as was described in the Cam install instructions.
I guess I'm asking for the quick and lazy adjustment technique, if one exists. Not sure if any of this made sense ?
BTW, I'm running Crane hydraulic roller lifters and a crane hyd roller cam with Erson adjustable rockers arms/shaft/stands.
Thanks,
I mean, if I see that the intake is full open on cylinder A, is it easy to say that cylinders x,y and z are closed and can be adjusted?
I want to adjust evreything tonight, before dropping the truck off tomorrow for dyno tuning the Demon carb. He reccomended torquing the adjusting screw to 18ft-lbs instead of trying to measure the lash or guesstimating turns after the pushrod stops spinning loosely. I'd rather not turn the crank to adjust each valve as was described in the Cam install instructions.
I guess I'm asking for the quick and lazy adjustment technique, if one exists. Not sure if any of this made sense ?
BTW, I'm running Crane hydraulic roller lifters and a crane hyd roller cam with Erson adjustable rockers arms/shaft/stands.
Thanks,
Post Fiend
Joined: Feb 2001
Posts: 6,624
Likes: 8
From: Missouri
No way Greg!!! There is no Ft lb method. That will trash your enigne. Some adjusters might not even turn under 18 ft lbs and others may go way too far. With small cams you can put the engine in two differnt positions and adjust half the rockers each time. I can't remember the method but it doesn't work with big cams. How big would take a mathmetician to figure out. I do it one at a time man. I would keep the guy away from your valvetrain and let him work wonders on your carb. He sounds like he is thinking of the pedestal type rockers which the FE of course never had.
Thread Starter
|
Lead Driver
Joined: Apr 2001
Posts: 6,175
Likes: 21
From: Texas
Well, that throws a monkey wrench in my plans....
It made sense to me. But then I'm no expert. It seemed more precise than this "tighten until the pushrods is hard to turn and then another 1/2 turn" method. It sure has not worked well so far. I've been back in a few times already to readjust these darn things.
Also, the other day I was driving it and running it up to about 5000RPM in first. It would start to chatter a lot at that higher RPM. Since I shouldn't have valve float until like 6500rpm, is this pinging? My MSD advance should be full in at like 3000RPM, so why would there be any difference between 3000 and 5000rpm?
It made sense to me. But then I'm no expert. It seemed more precise than this "tighten until the pushrods is hard to turn and then another 1/2 turn" method. It sure has not worked well so far. I've been back in a few times already to readjust these darn things.
Also, the other day I was driving it and running it up to about 5000RPM in first. It would start to chatter a lot at that higher RPM. Since I shouldn't have valve float until like 6500rpm, is this pinging? My MSD advance should be full in at like 3000RPM, so why would there be any difference between 3000 and 5000rpm?
Post Fiend
Joined: Feb 2001
Posts: 6,624
Likes: 8
From: Missouri
If your not pinging at 3000 then you shouldn't be pinging at 5,000. Take one of your old crappy valve covers and cut the very top out just above the adjuster nuts and just big enough to get a socket on. Then you can run the engine at 500rpm or so and see where the clatter is coming from and adjust accordingly. I have had a slight valvetrain chatter ever since I rebuilt it but it only does it at low RPMS. I think I have a bad lifter. I need to get an old valve cover and do the same. I cut too much off the last one and it gets oil everywhere. Exhaust leaks sound a lot like valve clatter. You really ought to investigate it. On my trip home from Indiana I heard a sudden loud lifter noise and thought I was screwed. I have never heard a header leak like that but that is what it was.
Thread Starter
|
Lead Driver
Joined: Apr 2001
Posts: 6,175
Likes: 21
From: Texas
Went in and tightened the back rockers on the passenger side as they were loose again. Seems to have helped. But there is still some engine speed related noise under there. It may be an exhaust leak torturing me :-) But it sounds a bit more mechanical, and trust me I am familar with exhaust leaks sounds.
Thread Starter
|
Lead Driver
Joined: Apr 2001
Posts: 6,175
Likes: 21
From: Texas
Going to Colvin today. We'll see what all he finds wrong today..
It sure hates to start in this cooler weather. Fires first try, goes to a nice smooth high idle for a few seconds then drops to a pathetic stmubling low idle and usually dies, depending on how cold it is. If I feather the throttle, I can keep it going, but it sounds terrible. It takes a few minutes before it seems that it's firing on all cylinders.
BTW, the advance at 3000+rpm seems to be right at the "T" in BTC, That seems appropriate to me, what do you think?
It sure hates to start in this cooler weather. Fires first try, goes to a nice smooth high idle for a few seconds then drops to a pathetic stmubling low idle and usually dies, depending on how cold it is. If I feather the throttle, I can keep it going, but it sounds terrible. It takes a few minutes before it seems that it's firing on all cylinders.
BTW, the advance at 3000+rpm seems to be right at the "T" in BTC, That seems appropriate to me, what do you think?
Last edited by gtex; Jan 5, 2004 at 07:59 AM.
Trending Topics
Post Fiend
Joined: Feb 2001
Posts: 6,624
Likes: 8
From: Missouri
Mine does the exact same thing. I am hoping the MSD ignition takes care of it. Mine acts like the carb has leaked fuel into the intake all night but it hasn't. It starts up just like you said and then start the real rough idle and then your eyes start burining. Choke adjustment makes no difference. Idle mixture is lean if anything.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Thread Starter
|
Lead Driver
Joined: Apr 2001
Posts: 6,175
Likes: 21
From: Texas
I guess I added this after you responded.
BTW, the advance at 3000+rpm seems to be right at the "T" in BTC, That seems appropriate to me, what do you think?
PS Moderator, the time stamps look a bit funny.
BTW, the advance at 3000+rpm seems to be right at the "T" in BTC, That seems appropriate to me, what do you think?
PS Moderator, the time stamps look a bit funny.
Post Fiend
Joined: Feb 2001
Posts: 6,624
Likes: 8
From: Missouri
Yeah that might be right. I would have to look. I just set my initial and add 36. Can't wait until tomorrow when my MSD stuff gets here and then I can set it for +20 instead. How do the timestamps look funny?